@font-face{font-family:Inter;font-style:normal;font-weight:100 900;font-display:swap;src:url(/_next/static/media/569ce4b8f30dc480-s.p.woff2) format("woff2");unicode-range:u+00??,u+0131,u+0152-0153,u+02bb-02bc,u+02c6,u+02da,u+02dc,u+0304,u+0308,u+0329,u+2000-206f,u+20ac,u+2122,u+2191,u+2193,u+2212,u+2215,u+feff,u+fffd}@font-face{font-family:Inter Fallback;src:local("Arial");ascent-override:90.44%;descent-override:22.52%;line-gap-override:0.00%;size-adjust:107.12%}.__className_8c7205{font-family:Inter,Inter Fallback;font-style:normal}.__variable_8c7205{--font-inter:"Inter","Inter Fallback"}

/*! tailwindcss v4.3.0 | MIT License | https://tailwindcss.com */@layer properties{@supports (((-webkit-hyphens:none)) and (not (margin-trim:inline))) or ((-moz-orient:inline) and (not (color:rgb(from red r g b)))){*,::backdrop,:after,:before{--tw-rotate-x:initial;--tw-rotate-y:initial;--tw-rotate-z:initial;--tw-skew-x:initial;--tw-skew-y:initial;--tw-border-style:solid;--tw-ordinal:initial;--tw-slashed-zero:initial;--tw-numeric-figure:initial;--tw-numeric-spacing:initial;--tw-numeric-fraction:initial;--tw-shadow:0 0 #0000;--tw-shadow-color:initial;--tw-shadow-alpha:100%;--tw-inset-shadow:0 0 #0000;--tw-inset-shadow-color:initial;--tw-inset-shadow-alpha:100%;--tw-ring-color:initial;--tw-ring-shadow:0 0 #0000;--tw-inset-ring-color:initial;--tw-inset-ring-shadow:0 0 #0000;--tw-ring-inset:initial;--tw-ring-offset-width:0px;--tw-ring-offset-color:#fff;--tw-ring-offset-shadow:0 0 #0000;--tw-outline-style:solid;--tw-blur:initial;--tw-brightness:initial;--tw-contrast:initial;--tw-grayscale:initial;--tw-hue-rotate:initial;--tw-invert:initial;--tw-opacity:initial;--tw-saturate:initial;--tw-sepia:initial;--tw-drop-shadow:initial;--tw-drop-shadow-color:initial;--tw-drop-shadow-alpha:100%;--tw-drop-shadow-size:initial;--tw-backdrop-blur:initial;--tw-backdrop-brightness:initial;--tw-backdrop-contrast:initial;--tw-backdrop-grayscale:initial;--tw-backdrop-hue-rotate:initial;--tw-backdrop-invert:initial;--tw-backdrop-opacity:initial;--tw-backdrop-saturate:initial;--tw-backdrop-sepia:initial}}}@layer theme{:host,:root{--spacing:.25rem;--text-xs:.75rem;--radius-sm:.25rem;--radius-md:.375rem;--radius-lg:.5rem;--radius-xl:.75rem;--radius-2xl:1rem;--shadow-xs:0 1px 2px 0 #0000000d;--shadow-sm:0 1px 3px 0 #0000001a,0 1px 2px -1px #0000001a;--shadow-md:0 4px 6px -1px #0000001a,0 2px 4px -2px #0000001a;--shadow-lg:0 10px 15px -3px #0000001a,0 4px 6px -4px #0000001a;--default-transition-duration:.15s;--default-transition-timing-function:cubic-bezier(.4,0,.2,1);--default-font-family:var(--font-sans-stack);--default-mono-font-family:var(--font-mono-stack)}}@layer base{*,::backdrop,:after,:before{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}:host,html{-webkit-text-size-adjust:100%;tab-size:4;line-height:1.5;font-family:var(--default-font-family,ui-sans-serif,system-ui,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji");font-feature-settings:var(--default-font-feature-settings,normal);font-variation-settings:var(--default-font-variation-settings,normal);-webkit-tap-highlight-color:transparent}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;-webkit-text-decoration:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,pre,samp{font-family:var(--default-mono-font-family,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono","Courier New",monospace);font-feature-settings:var(--default-mono-font-feature-settings,normal);font-variation-settings:var(--default-mono-font-variation-settings,normal);font-size:1em}small{font-size:80%}sub,sup{vertical-align:baseline;font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}:-moz-focusring{outline:auto}progress{vertical-align:baseline}summary{display:list-item}menu,ol,ul{list-style:none}audio,canvas,embed,iframe,img,object,svg,video{vertical-align:middle;display:block}img,video{max-width:100%;height:auto}button,input,optgroup,select,textarea{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}::file-selector-button{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}:where(select:is([multiple],[size])) optgroup{font-weight:bolder}:where(select:is([multiple],[size])) optgroup option{padding-inline-start:20px}::file-selector-button{margin-inline-end:4px}::placeholder{opacity:1}@supports (not ((-webkit-appearance:-apple-pay-button))) or (contain-intrinsic-size:1px){::placeholder{color:currentColor}@supports (color:color-mix(in lab,red,red)){::placeholder{color:color-mix(in oklab,currentcolor 50%,transparent)}}}textarea{resize:vertical}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-date-and-time-value{min-height:1lh;text-align:inherit}::-webkit-datetime-edit{display:inline-flex}::-webkit-datetime-edit-fields-wrapper{padding:0}::-webkit-datetime-edit,::-webkit-datetime-edit-year-field{padding-block:0}::-webkit-datetime-edit-day-field,::-webkit-datetime-edit-month-field{padding-block:0}::-webkit-datetime-edit-hour-field,::-webkit-datetime-edit-minute-field{padding-block:0}::-webkit-datetime-edit-millisecond-field,::-webkit-datetime-edit-second-field{padding-block:0}::-webkit-datetime-edit-meridiem-field{padding-block:0}::-webkit-calendar-picker-indicator{line-height:1}:-moz-ui-invalid{box-shadow:none}button,input:where([type=button],[type=reset],[type=submit]){appearance:button}::file-selector-button{appearance:button}::-webkit-inner-spin-button,::-webkit-outer-spin-button{height:auto}[hidden]:where(:not([hidden=until-found])){display:none!important}}@layer components;@layer utilities{.collapse{visibility:collapse}.invisible{visibility:hidden}.visible{visibility:visible}.sr-only{clip-path:inset(50%);white-space:nowrap;border-width:0;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden}.absolute,.sr-only{position:absolute}.fixed{position:fixed}.relative{position:relative}.static{position:static}.sticky{position:sticky}.top-50{top:calc(var(--spacing) * 50)}.isolate{isolation:isolate}.container{width:100%}@media (min-width:40rem){.container{max-width:40rem}}@media (min-width:48rem){.container{max-width:48rem}}@media (min-width:64rem){.container{max-width:64rem}}@media (min-width:80rem){.container{max-width:80rem}}@media (min-width:96rem){.container{max-width:96rem}}.block{display:block}.contents{display:contents}.flex{display:flex}.grid{display:grid}.hidden{display:none}.inline{display:inline}.table{display:table}.shrink{flex-shrink:1}.grow{flex-grow:1}.transform{transform:var(--tw-rotate-x,) var(--tw-rotate-y,) var(--tw-rotate-z,) var(--tw-skew-x,) var(--tw-skew-y,)}.resize{resize:both}.flex-wrap{flex-wrap:wrap}.rounded{border-radius:.25rem}.border{border-style:var(--tw-border-style);border-width:1px}.lowercase{text-transform:lowercase}.uppercase{text-transform:uppercase}.ordinal{--tw-ordinal:ordinal;font-variant-numeric:var(--tw-ordinal,) var(--tw-slashed-zero,) var(--tw-numeric-figure,) var(--tw-numeric-spacing,) var(--tw-numeric-fraction,)}.underline{text-decoration-line:underline}.ring{--tw-ring-shadow:var(--tw-ring-inset,) 0 0 0 calc(1px + var(--tw-ring-offset-width)) var(--tw-ring-color,currentcolor);box-shadow:var(--tw-inset-shadow),var(--tw-inset-ring-shadow),var(--tw-ring-offset-shadow),var(--tw-ring-shadow),var(--tw-shadow)}.outline{outline-style:var(--tw-outline-style);outline-width:1px}.blur{--tw-blur:blur(8px)}.blur,.filter{filter:var(--tw-blur,) var(--tw-brightness,) var(--tw-contrast,) var(--tw-grayscale,) var(--tw-hue-rotate,) var(--tw-invert,) var(--tw-saturate,) var(--tw-sepia,) var(--tw-drop-shadow,)}.backdrop-filter{-webkit-backdrop-filter:var(--tw-backdrop-blur,) var(--tw-backdrop-brightness,) var(--tw-backdrop-contrast,) var(--tw-backdrop-grayscale,) var(--tw-backdrop-hue-rotate,) var(--tw-backdrop-invert,) var(--tw-backdrop-opacity,) var(--tw-backdrop-saturate,) var(--tw-backdrop-sepia,);backdrop-filter:var(--tw-backdrop-blur,) var(--tw-backdrop-brightness,) var(--tw-backdrop-contrast,) var(--tw-backdrop-grayscale,) var(--tw-backdrop-hue-rotate,) var(--tw-backdrop-invert,) var(--tw-backdrop-opacity,) var(--tw-backdrop-saturate,) var(--tw-backdrop-sepia,)}.transition{transition-property:color,background-color,border-color,outline-color,text-decoration-color,fill,stroke,--tw-gradient-from,--tw-gradient-via,--tw-gradient-to,opacity,box-shadow,transform,translate,scale,rotate,filter,-webkit-backdrop-filter,backdrop-filter,display,content-visibility,overlay,pointer-events;transition-timing-function:var(--tw-ease,var(--default-transition-timing-function));transition-duration:var(--tw-duration,var(--default-transition-duration))}}:root{color-scheme:light;--background:#f4f3ee;--background-elevated:#fff;--paper:#faf8f3;--surface-0:#fff;--surface-1:#fff;--surface-2:#fafaf6;--surface-3:#f0eee7;--surface-glass:#f4f3eed1;--card:var(--surface-1);--border:#0f131a12;--border-strong:#0f131a21;--card-border:var(--border);--foreground:#15181d;--foreground-strong:#0a0c10;--muted:#5a626f;--subtle:#6b7585;--disabled:#b8bdc7;--accent:#2563eb;--accent-hover:#1d4ed8;--accent-strong:#1e40af;--accent-soft:#2563eb17;--accent-tint:#eaf1ff;--warm:#d97706;--warm-soft:#d977061a;--warm-tint:#fff7eb;--correct:#15803d;--correct-soft:#15803d1a;--correct-tint:#e9f7ef;--wrong:#dc2626;--wrong-soft:#dc262617;--wrong-tint:#fdecec;--danger:#b91c1c;--shadow-xs:0 1px 2px #0f131a0a;--shadow-sm:0 2px 4px #0f131a0d,0 1px 2px #0f131a08;--shadow-md:0 6px 18px #0f131a12,0 2px 6px #0f131a0a;--shadow-lg:0 18px 40px #0f131a1a,0 4px 12px #0f131a0a;--shadow-glow:0 0 0 4px #2563eb1a;--inner-glow:inset 0 1px 0 #ffffffb3;--radius-sm:6px;--radius-md:10px;--radius-lg:14px;--radius-xl:20px;--radius-2xl:28px;--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:20px;--space-6:24px;--space-8:32px;--space-10:40px;--space-12:48px;--space-16:64px;--font-sans-stack:var(--font-inter),Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;--font-mono-stack:"SFMono-Regular","SF Mono",Consolas,"Liberation Mono",monospace;--text-display:clamp(2.4rem,6vw,4.2rem);--text-h1:clamp(1.85rem,4vw,2.75rem);--text-h2:clamp(1.3rem,2.4vw,1.65rem);--text-h3:clamp(1.02rem,1.5vw,1.16rem);--text-body:1rem;--text-small:.875rem;--text-xs:.78rem;--text-mono:.82rem;--ease-standard:cubic-bezier(.2,.8,.2,1);--ease-press:cubic-bezier(.3,0,.2,1);--duration-fast:.14s;--duration-med:.22s}*{box-sizing:border-box}html{background:var(--background);scroll-behavior:smooth;-webkit-text-size-adjust:100%;min-height:100%}body{min-height:100vh;color:var(--foreground);font-family:var(--font-sans-stack);font-size:var(--text-body);text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:radial-gradient(circle at 8% -12%,#2563eb0f,transparent 36rem),radial-gradient(circle at 92% -18%,#d977060d,transparent 32rem),var(--background);margin:0;line-height:1.55}::selection{color:var(--foreground-strong);background:#2563eb2e}a{color:inherit}button,input,select,textarea{font:inherit}button{-webkit-tap-highlight-color:transparent}img{max-width:100%;height:auto;display:block}h1,h2,h3,p{margin:0}:focus-visible{box-shadow:var(--shadow-focus,0 0 0 4px #2563eb38);border-radius:4px;outline:none}.app-icon{stroke-width:2px;flex:none;width:1.05rem;height:1.05rem}.site-root{flex-direction:column;min-height:100vh;display:flex}.site-header{z-index:50;-webkit-backdrop-filter:blur(18px)saturate(160%);transition:background var(--duration-med) var(--ease-standard),border-color var(--duration-med) var(--ease-standard),box-shadow var(--duration-med) var(--ease-standard);background:#f4f3eecc;border-bottom:1px solid #0000;position:sticky;top:0}.site-header.is-scrolled{border-color:var(--border);background:#f4f3eef2;box-shadow:0 1px 14px #0f131a0a}.site-header-inner{justify-content:space-between;align-items:center;gap:var(--space-4);width:min(1200px,100% - 32px);min-height:68px;margin:0 auto;display:flex}.site-brand{align-items:center;gap:var(--space-3);min-height:44px;color:var(--foreground-strong);letter-spacing:-.01em;white-space:nowrap;font-weight:720;text-decoration:none;display:inline-flex}.site-brand-mark{border-radius:var(--radius-md);background:linear-gradient(135deg,var(--accent),var(--accent-strong));color:#fff;place-items:center;width:38px;height:38px;display:grid;box-shadow:0 4px 14px #2563eb52}.site-brand-copy{flex-direction:column;line-height:1.05;display:flex}.site-brand-kicker{color:var(--subtle);letter-spacing:.16em;text-transform:uppercase;font-size:.66rem;font-weight:720}.site-brand-name{font-size:1rem}.site-nav{background:var(--surface-0);border:1px solid var(--border);box-shadow:var(--shadow-xs);gap:2px;padding:4px;display:flex}.site-nav,.site-nav-link{border-radius:999px;align-items:center}.site-nav-link{min-height:36px;padding:0 var(--space-3);color:var(--muted);white-space:nowrap;transition:color var(--duration-fast) var(--ease-standard),background var(--duration-fast) var(--ease-standard);justify-content:center;gap:6px;font-size:.86rem;font-weight:600;text-decoration:none;display:inline-flex}.site-nav-link:hover{color:var(--foreground-strong);background:var(--paper)}.site-nav-link.is-active{color:#fff;background:var(--accent);box-shadow:0 2px 8px #2563eb52}.nav-label{display:inline}.site-main{width:min(1200px,100% - 32px);padding:var(--space-10) 0 var(--space-16);flex:1;margin:0 auto}.site-footer{border-top:1px solid var(--border);background:var(--paper)}.site-footer-inner{width:min(1200px,100% - 32px);padding:var(--space-6) 0;justify-content:space-between;gap:var(--space-4);font-size:var(--text-small);flex-wrap:wrap;margin:0 auto;display:flex}.footer-meta,.site-footer-inner{align-items:center;color:var(--muted)}.footer-meta{gap:var(--space-2);display:inline-flex}.footer-dot{background:var(--correct);border-radius:999px;width:6px;height:6px;box-shadow:0 0 12px #15803d80}.page-shell{gap:var(--space-10);display:grid}.page-header{gap:var(--space-3);max-width:820px;display:grid}.eyebrow{align-items:center;gap:var(--space-2);width:fit-content;color:var(--accent-strong);letter-spacing:.15em;text-transform:uppercase;font-size:.72rem;font-weight:800;display:inline-flex}.page-title{font-size:var(--text-h1);letter-spacing:-.02em;font-weight:800;line-height:1.04}.page-title,.section-title{color:var(--foreground-strong)}.section-title{font-size:var(--text-h2);letter-spacing:-.01em;font-weight:750;line-height:1.16}.section-kicker{color:var(--subtle);font-size:var(--text-xs);letter-spacing:.12em;text-transform:uppercase;font-weight:750}.lede{max-width:700px;font-size:clamp(1.02rem,1.5vw,1.14rem);line-height:1.62}.lede,.muted{color:var(--muted)}.subtle{color:var(--subtle)}.mono,.tabular{font-variant-numeric:tabular-nums}.mono{font-family:var(--font-mono-stack)}.card{background:var(--surface-0);border:1px solid var(--card-border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm)}.card-pad{padding:var(--space-6)}.card-link{color:inherit;text-decoration:none;display:block}.interactive-card{transition:transform var(--duration-med) var(--ease-standard),border-color var(--duration-med) var(--ease-standard),box-shadow var(--duration-med) var(--ease-standard)}.interactive-card:hover{border-color:var(--border-strong);box-shadow:var(--shadow-md);transform:translateY(-2px)}.btn{justify-content:center;align-items:center;gap:var(--space-2);border-radius:var(--radius-md);min-height:44px;padding:0 var(--space-4);color:#fff;background:linear-gradient(180deg,var(--accent),var(--accent-strong));cursor:pointer;transition:transform var(--duration-fast) var(--ease-press),box-shadow var(--duration-fast) var(--ease-standard),background var(--duration-fast) var(--ease-standard);border:1px solid #0000;font-size:.92rem;font-weight:650;line-height:1;text-decoration:none;display:inline-flex;box-shadow:0 2px 6px #2563eb38,inset 0 1px #fff3}.btn:hover{transform:translateY(-1px);box-shadow:0 6px 16px #2563eb47,inset 0 1px #fff3}.btn:active{transform:translateY(0)}.btn:disabled,.btn[aria-disabled=true]{color:var(--disabled);background:var(--surface-3);box-shadow:none;cursor:not-allowed;opacity:.7;transform:none}.btn-outline,.btn-secondary{color:var(--foreground-strong);background:var(--surface-0);border-color:var(--border-strong);box-shadow:var(--shadow-xs)}.btn-outline:hover,.btn-secondary:hover{background:var(--paper);box-shadow:var(--shadow-sm);border-color:#0f131a33}.btn-ghost{color:var(--muted);box-shadow:none;background:0 0;border-color:#0000}.btn-ghost:hover{color:var(--foreground-strong);background:var(--paper)}.btn-danger{color:#fff;background:linear-gradient(180deg,#ef4444,var(--danger));box-shadow:0 2px 8px #b91c1c3d,inset 0 1px #ffffff29}.btn-success{color:#fff;background:linear-gradient(180deg,#22c55e,var(--correct));box-shadow:0 2px 8px #15803d3d,inset 0 1px #ffffff2e}.icon-btn{border:1px solid var(--border);border-radius:var(--radius-md);width:40px;height:40px;color:var(--muted);background:var(--surface-0);box-shadow:var(--shadow-xs);cursor:pointer;transition:color var(--duration-fast) var(--ease-standard),background var(--duration-fast) var(--ease-standard),border-color var(--duration-fast) var(--ease-standard),transform var(--duration-fast) var(--ease-standard);place-items:center;display:inline-grid}.icon-btn:hover{color:var(--foreground-strong);background:var(--paper);border-color:var(--border-strong)}.icon-btn:active{transform:scale(.97)}.bookmark-btn.is-active,.icon-btn.is-active{color:var(--warm);background:var(--warm-tint);border-color:#d977064d}.badge{min-height:24px;padding:0 var(--space-3);background:var(--accent-tint);color:var(--accent-strong);letter-spacing:.06em;text-transform:uppercase;white-space:nowrap;border:1px solid #2563eb33;border-radius:999px;align-items:center;gap:6px;font-size:.7rem;font-weight:750;line-height:1;display:inline-flex}.badge.easy{color:var(--correct);background:var(--correct-tint);border-color:#15803d38}.badge.medium{color:var(--warm);background:var(--warm-tint);border-color:#d977063d}.badge.hard{color:var(--wrong);background:var(--wrong-tint);border-color:#dc262638}.meta-chip{padding:0 var(--space-3);border:1px solid var(--border);background:var(--surface-0);color:var(--muted);white-space:nowrap;border-radius:999px;gap:6px;font-size:.78rem;font-weight:600;line-height:1}.citation-chip,.meta-chip{min-height:28px;align-items:center;display:inline-flex}.citation-chip{gap:var(--space-2);width:fit-content;max-width:100%;padding:4px var(--space-3);color:var(--accent-strong);background:var(--accent-tint);border:1px solid #2563eb2e;border-radius:999px;font-size:.76rem;font-weight:650;line-height:1.2}.progress-wrap{gap:var(--space-2);display:grid}.progress-meta{justify-content:space-between;align-items:center;gap:var(--space-3);color:var(--muted);font-size:var(--text-small);font-weight:600;display:flex}.progress-bar{background:var(--surface-3);border-radius:999px;height:8px;position:relative;overflow:hidden}.progress-bar>div,.progress-fill{border-radius:inherit;background:linear-gradient(90deg,var(--accent),var(--accent-strong));height:100%;transition:width .25s var(--ease-standard)}.stat-grid{gap:var(--space-4);grid-template-columns:repeat(3,minmax(0,1fr));display:grid}.stat-card{align-content:space-between;gap:var(--space-3);min-height:104px;padding:var(--space-5);display:grid}.stat-label{color:var(--subtle);letter-spacing:.12em;text-transform:uppercase;font-size:.7rem;font-weight:750}.review-stat-value,.stat-value{color:var(--foreground-strong);letter-spacing:-.02em;font-variant-numeric:tabular-nums;font-size:clamp(1.9rem,4vw,2.5rem);font-weight:800;line-height:.95}.stat-note{color:var(--muted);font-size:var(--text-small)}.home-hero{gap:var(--space-8);padding:var(--space-4) 0;grid-template-columns:minmax(0,1.04fr) minmax(340px,.78fr);align-items:stretch;display:grid}.hero-copy{align-content:center;gap:var(--space-6);min-height:460px;display:grid}.hero-title{max-width:760px;color:var(--foreground-strong);font-size:var(--text-display);letter-spacing:-.025em;font-weight:820;line-height:1}.action-row,.hero-actions{gap:var(--space-3);flex-wrap:wrap;display:flex}.hero-visual{border-radius:var(--radius-2xl);background:var(--surface-0);border:1px solid var(--border);min-height:460px;box-shadow:var(--shadow-lg);position:relative;overflow:hidden}.hero-visual img{object-fit:cover;object-position:center;width:100%;height:100%;min-height:460px}.hero-instrument{left:var(--space-5);right:var(--space-5);bottom:var(--space-5);z-index:1;gap:var(--space-3);padding:var(--space-4);border-radius:var(--radius-lg);border:1px solid var(--border);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);box-shadow:var(--shadow-md);background:#fffffff0;display:grid;position:absolute}.instrument-row{justify-content:space-between;align-items:center;gap:var(--space-4);display:flex}.instrument-title{color:var(--foreground-strong);font-size:.92rem;font-weight:700}.instrument-value{color:var(--accent-strong);font-family:var(--font-mono-stack);font-variant-numeric:tabular-nums;font-size:.82rem;font-weight:700}.exam-mode-grid,.quick-grid,.review-grid,.topic-grid{gap:var(--space-4);grid-template-columns:repeat(auto-fit,minmax(240px,1fr));display:grid}.exam-mode-card,.quick-tile,.review-action-card{align-content:space-between;gap:var(--space-5);min-height:168px;padding:var(--space-5);display:grid}.exam-mode-card,.review-action-card{text-align:left;background:var(--surface-0);border:1px solid var(--card-border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);cursor:pointer;color:inherit}.review-action-card:disabled{opacity:.55;cursor:not-allowed}.mode-list{font-size:var(--text-small);color:var(--muted);gap:6px;display:grid}.mode-list span:before{content:"•  ";color:var(--subtle)}.tile-top{justify-content:space-between;align-items:flex-start;gap:var(--space-4);color:var(--subtle);display:flex}.empty-icon,.mode-icon,.review-icon,.tile-icon,.topic-icon{border-radius:var(--radius-md);width:44px;height:44px;color:var(--topic-accent,var(--accent));background:var(--topic-accent,var(--accent));place-items:center;display:grid}@supports (color:color-mix(in lab,red,red)){.empty-icon,.mode-icon,.review-icon,.tile-icon,.topic-icon{background:color-mix(in srgb,var(--topic-accent,var(--accent)) 12%,transparent)}}.empty-icon,.mode-icon,.review-icon,.tile-icon,.topic-icon{border:1px solid var(--topic-accent,var(--accent))}@supports (color:color-mix(in lab,red,red)){.empty-icon,.mode-icon,.review-icon,.tile-icon,.topic-icon{border:1px solid color-mix(in srgb,var(--topic-accent,var(--accent)) 22%,transparent)}}.mode-title,.tile-title,.topic-title{color:var(--foreground-strong);font-size:var(--text-h3);letter-spacing:-.005em;font-weight:700;line-height:1.18}.mode-copy,.tile-copy,.topic-copy{color:var(--muted);font-size:var(--text-small);line-height:1.55}.coverage-section,.topic-card{gap:var(--space-4);display:grid}.topic-card{min-height:168px;padding:var(--space-5);position:relative;overflow:hidden}.topic-card:before{content:"";background:radial-gradient(circle at 84% 18%,var(--topic-accent,var(--accent)),transparent 50%);position:absolute;inset:0}@supports (color:color-mix(in lab,red,red)){.topic-card:before{background:radial-gradient(circle at 84% 18%,color-mix(in srgb,var(--topic-accent,var(--accent)) 11%,transparent),transparent 50%)}}.topic-card:before{pointer-events:none}.topic-card>*{position:relative}.topic-card-head{justify-content:space-between;align-items:flex-start;gap:var(--space-4);display:flex}.topic-count{color:var(--subtle);letter-spacing:.1em;text-transform:uppercase;font-size:.72rem;font-weight:700}.topic-footer{justify-content:space-between;align-items:center;gap:var(--space-3);color:var(--topic-accent,var(--accent-strong));font-size:var(--text-small);font-weight:700;display:flex}.topic-entry{gap:var(--space-6);display:grid}.topic-entry-card{padding:var(--space-6);gap:var(--space-5);display:grid}.quiz-shell,.result-shell,.review-list{gap:var(--space-5);max-width:820px;margin:0 auto;display:grid}.quiz-topbar{gap:var(--space-3);display:grid}.quiz-title-row{justify-content:space-between;align-items:center;gap:var(--space-4);flex-wrap:wrap;display:flex}.quiz-title{color:var(--foreground-strong);flex:1;min-width:0;margin:0;font-size:1.22rem;font-weight:720}.quiz-status{align-items:center;gap:var(--space-2);color:var(--muted);font-size:var(--text-small);font-variant-numeric:tabular-nums;font-weight:600;display:inline-flex}.quiz-card{padding:var(--space-6);gap:var(--space-5);display:grid}.quiz-meta-row{justify-content:space-between;align-items:center;gap:var(--space-3);flex-wrap:wrap;display:flex}.quiz-meta-left,.quiz-meta-right{align-items:center;gap:var(--space-2);display:inline-flex}.quiz-stem{color:var(--foreground);white-space:pre-wrap;font-size:1.08rem;font-weight:500;line-height:1.55}.choice-list{gap:10px;display:grid}.choice{text-align:left;border-radius:var(--radius-md);border:1px solid var(--border-strong);background:var(--surface-0);width:100%;min-height:52px;color:var(--foreground);cursor:pointer;transition:border-color var(--duration-fast) var(--ease-standard),background var(--duration-fast) var(--ease-standard),box-shadow var(--duration-fast) var(--ease-standard);padding:14px 16px;font-family:inherit;font-size:.97rem;line-height:1.45;display:block}.choice:hover:not(:disabled):not(.is-disabled){border-color:var(--accent);background:var(--accent-tint)}.choice:focus-visible{outline:2px solid var(--accent-strong,var(--accent));outline-offset:2px}.choice.is-disabled,.choice:disabled{cursor:default}.choice.correct{border-color:var(--correct);background:var(--correct-tint);font-weight:600}.choice.correct,.choice.wrong{color:var(--foreground-strong)}.choice.wrong{border-color:var(--wrong);background:var(--wrong-tint)}.choice.selected{border-color:var(--accent);background:var(--accent-tint)}.explanation-panel{padding:var(--space-4);border-radius:var(--radius-md);background:var(--surface-2);border:1px solid var(--border);gap:var(--space-3);display:grid}.explanation-title{color:var(--foreground-strong);align-items:center;gap:var(--space-2);font-weight:700;display:inline-flex}.explanation-copy{color:var(--foreground);font-size:.94rem;line-height:1.6}.quiz-nav{justify-content:space-between;align-items:center;gap:var(--space-3);flex-wrap:wrap;display:flex}.quiz-nav-actions{gap:var(--space-2);flex-wrap:wrap;display:flex}.result-hero{padding:var(--space-6);gap:var(--space-4);display:grid}.result-hero.pass{background:linear-gradient(180deg,var(--correct-tint),var(--surface-0));border-color:#15803d38}.result-hero.fail{background:linear-gradient(180deg,var(--wrong-tint),var(--surface-0));border-color:#dc262638}.result-score{align-items:baseline;gap:var(--space-3);display:flex}.result-score strong{color:var(--foreground-strong);font-variant-numeric:tabular-nums;font-size:3rem;font-weight:820;line-height:1}.result-score span{color:var(--muted);font-size:1rem}.breakdown-grid{gap:var(--space-2);display:grid}.breakdown-row{padding:var(--space-3) var(--space-4);border-radius:var(--radius-md);border:1px solid var(--border);background:var(--surface-2);justify-content:space-between;align-items:center;gap:var(--space-4);display:flex}.breakdown-row.is-weakest{background:var(--wrong-tint);border-color:#dc26264d}.breakdown-row .stat-value{font-size:1.4rem}.review-question{color:var(--foreground-strong);font-weight:600}.review-item{gap:var(--space-2);padding:var(--space-4);border-radius:var(--radius-md);border:1px solid var(--border);background:var(--surface-2);display:grid}.review-stat-grid{gap:var(--space-3);grid-template-columns:repeat(auto-fit,minmax(160px,1fr));display:grid}.review-stat{padding:var(--space-4);gap:4px;display:grid}.review-panel{padding:var(--space-6)}.home-progress,.review-panel{gap:var(--space-4);display:grid}.activity-grid,.activity-list{gap:var(--space-3);display:grid}.activity-grid{grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}.activity-item{padding:var(--space-4);border-radius:var(--radius-md);border:1px solid var(--border);background:var(--surface-0);gap:4px;display:grid}.activity-title{color:var(--foreground-strong);font-weight:650}.activity-meta{color:var(--muted);font-size:var(--text-small);font-variant-numeric:tabular-nums}.cheat-section{gap:var(--space-3);margin-bottom:var(--space-6);display:grid}.cheat-section-title{color:var(--foreground-strong);letter-spacing:-.01em;border-left:3px solid var(--accent);padding-left:10px;font-size:1.06rem;font-weight:750}.cheat-table-card{padding:0;overflow:hidden}.cheat-table{border-collapse:collapse;width:100%}.cheat-table td.label{vertical-align:top;width:34%;color:var(--foreground-strong);padding:14px 18px;font-size:.93rem;font-weight:650}.cheat-table td.value{color:var(--foreground);padding:14px 18px;font-size:.93rem;line-height:1.6}.cheat-row.is-expandable{cursor:pointer;transition:background var(--duration-fast)}.cheat-row.is-expandable:hover{background:var(--surface-2)}.cheat-row.is-open{background:var(--accent-tint)}.cheat-row td.label span{align-items:center;gap:6px;display:inline-flex}.cheat-disclosure{width:16px;height:16px;color:var(--accent);transition:transform var(--duration-fast) var(--ease-standard);justify-content:center;align-items:center;display:inline-flex}.cheat-row.is-open .cheat-disclosure{transform:rotate(90deg)}.cheat-table tr+tr{border-top:1px solid var(--border)}.cheat-detail-row td{background:var(--accent-tint);border-top:1px solid #2563eb2e;padding:0}.cheat-detail{color:var(--foreground);border-left:3px solid var(--accent);box-shadow:var(--shadow-xs);background:#fff;border-radius:0 6px 6px 0;margin:4px 18px 18px;padding:16px 18px;font-size:.92rem;line-height:1.65}.flash-shell{gap:var(--space-5);max-width:820px;margin:0 auto;display:grid}.flash-topbar{justify-content:space-between;align-items:flex-end;gap:var(--space-3);flex-wrap:wrap;display:flex}.flash-stage{place-items:stretch stretch;display:grid}.flash-card{padding:var(--space-6);gap:var(--space-5);cursor:pointer;transition:transform var(--duration-med) var(--ease-standard),box-shadow var(--duration-med) var(--ease-standard);outline:none;min-height:360px;display:grid}.flash-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}.flash-card.is-revealed{border-color:#2563eb52}.flash-question{color:var(--foreground-strong);white-space:pre-wrap;font-size:1.16rem;font-weight:600;line-height:1.45}.flash-choice-list{gap:8px;display:grid}.flash-choice{border-radius:var(--radius-md);border:1px solid var(--border);background:var(--surface-2);color:var(--foreground);padding:12px 14px;font-size:.93rem;line-height:1.45}.flash-choice.is-answer{border-color:var(--correct);background:var(--correct-tint);color:var(--foreground-strong);font-weight:600}.kbd-row{gap:var(--space-2);color:var(--subtle);padding:var(--space-3);flex-wrap:wrap;font-size:.78rem;display:flex}.kbd-row,.kbd-row kbd{justify-content:center;align-items:center}.kbd-row kbd{background:var(--surface-0);min-width:26px;color:var(--foreground);font-family:var(--font-mono-stack);border:solid var(--border-strong);border-width:1px 1px 2px;border-radius:5px;padding:2px 7px;font-size:.7rem;font-weight:650;display:inline-flex}.empty-state{padding:var(--space-8);text-align:center;place-items:center;gap:var(--space-4);display:grid}.review-panel.empty-state{padding:var(--space-8)}.exam-landing{gap:var(--space-8);display:grid}.figure-shell{margin:0 calc(-1 * var(--space-6)) var(--space-4);gap:var(--space-2);display:grid}.figure-button{cursor:zoom-in;background:0 0;border:none;width:100%;padding:0;display:block;position:relative}.figure-button img{border-top:1px solid var(--border);border-bottom:1px solid var(--border);background:#f7f5ee;width:100%;height:auto;display:block}.figure-zoom-chip{pointer-events:none;position:absolute;top:12px;right:16px;color:#fff!important;background:#0f131ac7!important;border-color:#ffffff2e!important}.figure-caption{margin:0 var(--space-5)}.figure-dialog{z-index:1000;touch-action:none;background:#080a0ef5;grid-template-rows:auto 1fr auto;display:grid;position:fixed;inset:0;overflow:hidden}.figure-dialog-bar{padding:var(--space-3) var(--space-4);justify-content:space-between;align-items:center;gap:var(--space-3);color:#fff;display:flex}.figure-dialog-bar.top{background:linear-gradient(#000000b3,#0000)}.figure-dialog-title{color:#fff;font-size:.92rem;font-weight:650}.figure-dialog .icon-btn{color:#fff;background:#ffffff24;border-color:#fff3}.figure-dialog .icon-btn:hover{background:#ffffff38}.figure-stage{cursor:default;place-items:center;display:grid;overflow:hidden}.figure-stage.is-draggable{cursor:grab}.figure-stage img{-webkit-user-select:none;user-select:none;pointer-events:none;max-width:100%;max-height:100%}.figure-controls{padding:var(--space-3);justify-content:center;gap:var(--space-2);display:flex}.figure-controls .btn{min-height:40px;padding:0 var(--space-3)}.glossary-trigger{appearance:none;min-height:32px;color:var(--accent-strong);font:inherit;font-weight:inherit;cursor:help;text-align:inherit;background:0 0;border:0;border-bottom:1px dotted #1e40af85;border-radius:4px;align-items:center;margin:-6px -2px;padding:6px 2px 4px;line-height:1;text-decoration:none;display:inline-flex}.glossary-trigger:hover{color:var(--accent);background:var(--accent-soft)}.glossary-trigger[aria-expanded=true]{color:var(--accent);background:var(--accent-tint)}.glossary-popover-layer{z-index:1000;pointer-events:none;position:fixed;inset:0}.glossary-modal,.glossary-popover{border:1px solid var(--border-strong);background:var(--surface-0);box-shadow:var(--shadow-lg);color:var(--foreground);border-radius:8px;padding:14px}.glossary-popover{z-index:1001;pointer-events:auto;max-height:min(360px,100vh - 24px);position:fixed;overflow:auto}.glossary-popover.is-top{transform:translateY(-100%)}.glossary-modal-backdrop{z-index:1000;padding:var(--space-4);background:#0f131a57;place-items:center;display:grid;position:fixed;inset:0}.glossary-modal{width:min(420px,100%);max-height:calc(100dvh - 32px);overflow:auto}.glossary-popover-header{justify-content:space-between;align-items:flex-start;gap:var(--space-3);display:flex}.glossary-popover-term{color:var(--foreground-strong);font-size:1rem;line-height:1.2;display:block}.glossary-popover-full{color:var(--accent-strong);font-size:var(--text-small);margin-top:2px;font-weight:650;line-height:1.35}.glossary-popover-definition{margin-top:var(--space-3);color:var(--foreground);font-size:.92rem;line-height:1.55}.glossary-popover-close{border:1px solid var(--border);background:var(--surface-2);width:32px;height:32px;color:var(--muted);cursor:pointer;border-radius:8px;flex:none;justify-content:center;align-items:center;display:inline-flex}.glossary-popover-close:hover{color:var(--foreground-strong);background:var(--accent-tint)}.glossary-search{padding:var(--space-4);gap:var(--space-3);grid-template-columns:minmax(0,1fr) auto;align-items:end;display:grid}.glossary-search-label{color:var(--foreground-strong);font-size:var(--text-small);grid-column:1/-1;font-weight:700}.glossary-search-input{border:1px solid var(--border-strong);width:100%;min-height:44px;padding:0 var(--space-4);background:var(--surface-0);color:var(--foreground);border-radius:8px;outline:none}.glossary-search-input:focus{border-color:var(--accent);box-shadow:var(--shadow-glow)}.glossary-search-count{color:var(--muted);font-size:var(--text-small);white-space:nowrap;font-weight:650}.glossary-category-nav{gap:var(--space-2);flex-wrap:wrap;display:flex}.glossary-category-link{border:1px solid var(--border);min-height:36px;padding:0 var(--space-3);background:var(--surface-0);color:var(--muted);font-size:var(--text-small);border-radius:999px;align-items:center;font-weight:650;text-decoration:none;display:inline-flex}.glossary-category-link:hover{color:var(--foreground-strong);border-color:var(--border-strong);background:var(--paper)}.glossary-groups{gap:var(--space-8);display:grid}.glossary-category-section,.glossary-entry{scroll-margin-top:92px}.glossary-category-title{margin-bottom:var(--space-3);justify-content:space-between;align-items:center;gap:var(--space-3);color:var(--foreground-strong);letter-spacing:-.01em;font-size:1.08rem;font-weight:760;display:flex}.glossary-category-title span:last-child{color:var(--subtle);font-size:var(--text-small);font-variant-numeric:tabular-nums;font-weight:700}.glossary-entry-list{gap:var(--space-3);grid-template-columns:repeat(auto-fit,minmax(260px,1fr));display:grid}.glossary-entry{padding:var(--space-4);gap:var(--space-2);border-radius:8px;display:grid}.glossary-entry-heading{justify-content:space-between;align-items:baseline;gap:var(--space-3);display:flex}.glossary-entry-heading h3{color:var(--foreground-strong);font-size:1rem;font-weight:800}.glossary-entry-anchor{color:var(--subtle);font-size:var(--text-small);font-weight:750;text-decoration:none}.glossary-entry-anchor:hover{color:var(--accent)}.glossary-entry-actions{gap:var(--space-2)}.audio-mini,.glossary-entry-actions{align-items:center;display:inline-flex}.audio-mini{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:999px;flex-shrink:0;justify-content:center;width:32px;height:32px;padding:0;transition:transform .12s,background .15s,box-shadow .15s;box-shadow:0 1px 3px #0f172a29}.audio-mini:hover{background:var(--accent-strong,var(--accent));transform:scale(1.05)}.audio-mini:active{transform:scale(.96)}.audio-mini:focus-visible{outline:2px solid var(--accent-strong,var(--accent));outline-offset:2px}.audio-mini svg{width:14px;height:14px}.audio-mini svg.audio-play-triangle,.audio-mini.audio-play-triangle{margin-left:1.5px}.audio-mini.is-backup{background:var(--surface-strong,#e5e7eb);color:var(--foreground-strong,#0f172a);box-shadow:inset 0 0 0 1px var(--border,#0f172a24)}.audio-mini.is-backup:hover{background:var(--surface,#f1f5f9)}.audio-mini.is-playing{background:var(--accent-strong,var(--accent));animation:audio-mini-pulse 1.6s ease-in-out infinite}@keyframes audio-mini-pulse{0%,to{box-shadow:0 0 0 0 color-mix(in oklab,var(--accent) 45%,transparent)}50%{box-shadow:0 0 0 6px color-mix(in oklab,var(--accent) 0%,transparent)}}.glossary-entry-full{color:var(--accent-strong);font-size:var(--text-small);font-weight:680;line-height:1.4}.glossary-entry-definition{color:var(--foreground);font-size:.93rem;line-height:1.6}@media (max-width:900px){.home-hero{grid-template-columns:1fr}.hero-visual,.hero-visual img{min-height:280px}.hero-copy{min-height:auto}.stat-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}@media (max-width:640px){.site-header-inner{gap:var(--space-2);min-height:56px;padding:0}.site-brand-mark{width:32px;height:32px}.site-brand-name{font-size:.9rem}.site-brand-kicker{font-size:.58rem}.site-nav{scrollbar-width:none;max-width:calc(100vw - 126px);padding:3px;overflow-x:auto}.site-nav::-webkit-scrollbar{display:none}.site-nav-link{min-height:32px;padding:0 9px;font-size:.78rem}.nav-label{display:none}.site-main{padding:var(--space-5) 0 var(--space-12)}.page-shell{gap:var(--space-6)}.stat-grid{gap:var(--space-2);grid-template-columns:repeat(3,minmax(0,1fr))}.stat-card{min-height:84px;padding:var(--space-3)}.stat-value{font-size:1.4rem}.stat-label{font-size:.6rem}.stat-note{display:none}.card-pad,.quiz-card,.review-panel,.topic-entry-card{padding:var(--space-4)}.btn{width:100%}.action-row .btn,.hero-actions .btn{flex:auto;width:auto;min-width:0}.quiz-nav .btn{flex:1;width:auto}.figure-shell{margin:0 calc(-1 * var(--space-4)) var(--space-3)}.figure-zoom-chip{top:8px;right:10px}.cheat-table,.cheat-table tbody,.cheat-table td,.cheat-table tr{display:block;width:100%!important}.cheat-row.is-expandable{padding:4px 0}.cheat-table td.label{text-transform:uppercase;letter-spacing:.05em;color:var(--subtle);padding:14px 18px 4px;font-size:.74rem;font-weight:700}.cheat-table td.label span{justify-content:space-between;width:100%}.cheat-table td.value{padding:0 18px 14px;font-size:.95rem}.cheat-detail{border-radius:0;margin:0 0 12px;padding:14px 18px}.glossary-search{grid-template-columns:1fr}.glossary-search-count{white-space:normal}.glossary-entry-list{grid-template-columns:1fr}}@media (prefers-reduced-motion:reduce){*,:after,:before{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important}}@keyframes spin{to{transform:rotate(1turn)}}.study-day,.study-path-list{gap:var(--space-5);display:grid}.study-day{position:relative;overflow:hidden}.study-day:before{content:"";background:linear-gradient(180deg,var(--topic-accent,var(--accent)),transparent 50%);position:absolute;inset:0}@supports (color:color-mix(in lab,red,red)){.study-day:before{background:linear-gradient(180deg,color-mix(in srgb,var(--topic-accent,var(--accent)) 6%,transparent),transparent 50%)}}.study-day:before{pointer-events:none}.study-day>*{position:relative}.study-day-head{align-items:flex-start;gap:var(--space-4);display:flex}.study-day-head .tile-icon{flex:none}.study-day-head>div{gap:4px;display:grid}.study-steps{gap:var(--space-4);border-top:1px solid var(--border);padding:0;padding-top:var(--space-4);margin:0;list-style:none;display:grid}.study-step{align-items:flex-start;gap:var(--space-3);display:flex}.study-step-number{background:var(--accent-tint);width:28px;height:28px;color:var(--accent-strong);font-variant-numeric:tabular-nums;border-radius:999px;flex:none;place-items:center;font-size:.85rem;font-weight:700;display:inline-grid}.study-step-title{color:var(--foreground-strong);align-items:center;gap:6px;font-weight:650;text-decoration:none;display:inline-flex}a.study-step-title:hover{color:var(--accent-strong)}.exam-day-list{gap:var(--space-3);margin:0;padding:0;list-style:none;display:grid}.exam-day-item{align-items:flex-start;gap:var(--space-3);display:flex}.exam-day-bullet{background:var(--correct-tint);width:26px;height:26px;color:var(--correct);border:1px solid #15803d38;border-radius:999px;flex:none;place-items:center;display:inline-grid}.exam-day-item>div{gap:4px;display:grid}.cold-facts-list{gap:var(--space-3);margin:0;padding:0;list-style:none;display:grid}.cold-fact{align-items:flex-start;gap:var(--space-3);padding:var(--space-3) 0;display:flex}.cold-fact+.cold-fact{border-top:1px solid var(--border)}.cold-fact-number{border-radius:var(--radius-md);background:var(--accent);color:#fff;font-variant-numeric:tabular-nums;width:32px;height:32px;box-shadow:var(--shadow-xs);flex:none;place-items:center;font-size:.88rem;font-weight:720;display:inline-grid}.cold-fact-text{color:var(--foreground-strong);font-size:.98rem;font-weight:600;line-height:1.5;display:block}.cold-fact-why{color:var(--muted);margin-top:4px;font-size:.85rem;line-height:1.5}.audio-player{--audio-progress:0%;gap:var(--space-3);width:100%;max-width:100%;padding:var(--space-3);border:1px solid var(--border);border-radius:var(--radius-lg);background:var(--surface-0);color:var(--foreground-strong);box-shadow:var(--shadow-md);flex-direction:column;display:flex;overflow:hidden}.audio-controls-row,.audio-timeline-row{flex-wrap:nowrap;align-items:center;width:100%;min-width:0;display:flex}.audio-controls-row{justify-content:space-between;gap:var(--space-2)}.audio-timeline-row{gap:var(--space-2)}.audio-control-group{align-items:center;gap:var(--space-1);flex:none;display:flex}.audio-control-group-right{justify-content:flex-end}.audio-title{text-align:center;flex:1 1 0;min-width:0}.audio-label{min-width:0;color:var(--foreground-strong);text-overflow:ellipsis;white-space:nowrap;font-size:.9rem;font-weight:760;line-height:1.15;display:block;overflow:hidden}.audio-play,.audio-skip,.audio-speed-toggle,.audio-stop{cursor:pointer;border-radius:999px;flex:none;place-items:center;min-width:44px;min-height:44px;margin:0;transition:background-color .14s,border-color .14s,color .14s,transform .14s,box-shadow .14s;display:inline-grid}.audio-play{background:var(--accent);width:52px;height:52px;color:var(--surface-0);box-shadow:var(--shadow-md);border:0}.audio-play:hover{background:var(--accent-strong)}.audio-play:active{transform:scale(.97)}.audio-play .app-icon{stroke-width:2.4px;width:22px;height:22px}.audio-play .audio-play-triangle{transform:translate(1px)}.audio-skip{width:44px;height:44px;color:var(--muted);background:0 0;border:1px solid #0000}.audio-skip:hover:not(:disabled){border-color:var(--border);background:var(--paper);color:var(--accent-strong)}.audio-skip:active:not(:disabled){transform:scale(.96)}.audio-skip:disabled{color:var(--muted);cursor:not-allowed;opacity:.45}.audio-skip .app-icon{stroke-width:2.2px;width:21px;height:21px}.audio-hd-pill{min-height:24px;background:var(--correct);color:var(--surface-0);cursor:help;letter-spacing:0;border-radius:999px;flex:none;justify-content:center;align-items:center;font-size:.68rem;font-weight:850;display:inline-flex}.audio-hd-pill,.audio-speed-toggle{padding:0 var(--space-2);line-height:1}.audio-speed-toggle{min-width:50px;height:44px;border:1px solid var(--border);background:var(--surface-0);color:var(--foreground-strong);font-variant-numeric:tabular-nums;font-size:.78rem;font-weight:760}.audio-speed-toggle:hover{border-color:var(--accent);background:var(--paper);color:var(--accent-strong)}.audio-stop{border:1px solid var(--border);background:var(--surface-0);width:44px;height:44px;color:var(--muted)}.audio-stop:hover:not(:disabled){border-color:var(--wrong);color:var(--wrong)}.audio-stop.is-hidden{visibility:hidden;pointer-events:none}.audio-stop:disabled{cursor:default}.audio-stop .app-icon{stroke-width:2.2px;width:18px;height:18px}.audio-backup-caption,.audio-time{color:var(--muted);font-variant-numeric:tabular-nums;white-space:nowrap;font-size:.74rem;font-weight:650;line-height:1}.audio-time{flex:0 0 4.8ch;width:4.8ch}.audio-time-end{text-align:right}.audio-backup-caption{text-overflow:ellipsis;flex:0 auto;min-width:0;max-width:13rem;overflow:hidden}.audio-seek{width:100%;min-width:48px;height:44px;accent-color:var(--accent);appearance:none;cursor:pointer;touch-action:pan-y;background:0 0;border:0;outline:none;flex:auto;margin:0;padding:0}.audio-seek:disabled{cursor:default;opacity:1}.audio-seek:focus-visible{box-shadow:none;outline:2px solid var(--accent);outline-offset:2px}.audio-seek::-webkit-slider-runnable-track{background:linear-gradient(var(--accent),var(--accent)) 0 /var(--audio-progress) 100% no-repeat,var(--border);border-radius:999px;height:8px}.audio-seek::-moz-range-track{background:var(--border);border-radius:999px;height:8px}.audio-seek::-moz-range-progress{background:var(--accent);border-radius:999px;height:8px}.audio-seek::-webkit-slider-thumb{border:2px solid var(--surface-0);background:var(--accent);width:16px;height:16px;box-shadow:var(--shadow-sm);appearance:none;border-radius:999px;margin-top:-4px}.audio-seek::-moz-range-thumb{border:2px solid var(--surface-0);background:var(--accent);width:16px;height:16px;box-shadow:var(--shadow-sm);border-radius:999px}.audio-player.is-backup .audio-skip{display:none}.audio-player.is-backup .audio-control-group-left{gap:0}.audio-player.is-backup .audio-seek{pointer-events:none}.audio-player.is-backup .audio-seek::-webkit-slider-thumb{opacity:0;width:0;height:0;box-shadow:none;border:0;margin-top:0}.audio-player.is-backup .audio-seek::-moz-range-thumb{opacity:0;width:0;height:0;box-shadow:none;border:0}.audio-unsupported{align-items:center;gap:var(--space-2);border-radius:var(--radius-md);background:var(--paper);color:var(--wrong);flex-direction:row;font-size:.84rem}.audio-unsupported .app-icon{flex:none;width:18px;height:18px}.audio-player.audio-player-sm{gap:var(--space-2);padding:var(--space-2);border-radius:var(--radius-md)}.audio-player.audio-player-sm .audio-controls-row,.audio-player.audio-player-sm .audio-timeline-row{gap:var(--space-1)}.audio-player.audio-player-sm .audio-play{width:44px;height:44px}.audio-player.audio-player-sm .audio-play .app-icon,.audio-player.audio-player-sm .audio-skip .app-icon{width:19px;height:19px}.audio-player.audio-player-sm .audio-label{font-size:.82rem}.audio-player.audio-player-sm .audio-hd-pill{min-height:22px;padding:0 7px;font-size:.63rem}.audio-player.audio-player-sm .audio-speed-toggle{min-width:46px;font-size:.74rem}.audio-player.audio-player-sm .audio-backup-caption,.audio-player.audio-player-sm .audio-time{font-size:.69rem}@media (max-width:480px){.audio-player{gap:var(--space-2);padding:var(--space-2)}.audio-control-group,.audio-controls-row,.audio-timeline-row{gap:var(--space-1)}.audio-label{font-size:.8rem}.audio-hd-pill{min-height:22px;padding:0 6px;font-size:.62rem}.audio-speed-toggle{min-width:46px;padding:0 6px;font-size:.74rem}.audio-backup-caption,.audio-time{font-size:.69rem}.audio-backup-caption{max-width:10rem}}@media (max-width:380px){.audio-control-group,.audio-controls-row{gap:0}.audio-title{padding:0}.audio-label{font-size:.76rem}.audio-speed-toggle{min-width:44px;padding:0 5px}.audio-backup-caption{max-width:9.5rem}}@media (prefers-reduced-motion:reduce){.audio-player *,.audio-player :after,.audio-player :before{transition:none!important;animation:none!important}}.listen-audio-system{gap:var(--space-5);display:grid}.listen-status-panel{gap:var(--space-3);grid-template-columns:repeat(2,minmax(0,1fr));display:grid}.listen-status-card{align-items:flex-start;gap:var(--space-3);min-width:0;padding:var(--space-4);border:1px solid var(--border);border-radius:var(--radius-lg);background:var(--surface-0);box-shadow:var(--shadow-sm);display:flex}.listen-status-icon{border-radius:var(--radius-md);width:36px;height:36px;color:var(--accent-strong);background:var(--accent-tint);flex:none;place-items:center;display:grid}.listen-status-title{color:var(--muted);font-size:.78rem;font-weight:760;line-height:1.25}.listen-status-value{color:var(--foreground-strong);overflow-wrap:anywhere;margin-top:3px;font-size:1.02rem;font-weight:760;line-height:1.25}.listen-status-note{color:var(--subtle);font-size:var(--text-xs);margin-top:2px;font-weight:650}.listen-coverage-panel,.listen-settings-panel{gap:var(--space-5);display:grid}.listen-section-head{justify-content:space-between;align-items:flex-start;gap:var(--space-3);flex-wrap:wrap;display:flex}.listen-preference-grid{gap:var(--space-3);grid-template-columns:repeat(2,minmax(0,1fr));display:grid}.listen-preference-option{align-items:flex-start;gap:var(--space-3);min-width:0;padding:var(--space-4);border:1px solid var(--border);border-radius:var(--radius-md);background:var(--surface-2);color:var(--foreground);cursor:pointer;transition:border-color var(--duration-fast) var(--ease-standard),background var(--duration-fast) var(--ease-standard),box-shadow var(--duration-fast) var(--ease-standard);display:flex}.listen-preference-option.is-active{border-color:var(--accent);background:var(--accent-tint);box-shadow:var(--shadow-xs)}.listen-preference-option input{accent-color:var(--accent);flex:none;margin-top:3px}.listen-preference-option span{gap:3px;min-width:0;display:grid}.listen-preference-option strong{color:var(--foreground-strong);font-size:.94rem;line-height:1.25}.listen-preference-option small{color:var(--muted);font-size:var(--text-xs);line-height:1.45}.listen-item,.listen-section{gap:var(--space-3);display:grid}.listen-item{padding:var(--space-4) var(--space-5);border-radius:var(--radius-md);border:1px solid var(--border);background:var(--surface-2)}.listen-item-head{justify-content:space-between;align-items:center;gap:var(--space-3);flex-wrap:wrap;display:flex}.listen-item-title{color:var(--foreground-strong);font-size:1rem;font-weight:700}.listen-item-meta{color:var(--subtle);font-size:.8rem}.cheat-section-head{justify-content:space-between;align-items:center;gap:var(--space-3);flex-wrap:wrap;margin-bottom:6px;display:flex}.cheat-playlist{z-index:25;background:var(--surface,#fff);border:1px solid var(--border,#0f172a1f);margin-bottom:var(--space-4);border-radius:14px;gap:8px;padding:12px 14px;display:grid;position:sticky;top:76px;box-shadow:0 6px 24px #0f172a0f,0 1px 2px #0f172a0a}.cheat-playlist.is-active{border-color:var(--accent)}@supports (color:color-mix(in lab,red,red)){.cheat-playlist.is-active{border-color:color-mix(in oklab,var(--accent) 38%,var(--border,#0f172a1f))}}.cheat-playlist.is-active{box-shadow:0 8px 32px #0f172a1a,0 0 0 3px var(--accent)}@supports (color:color-mix(in lab,red,red)){.cheat-playlist.is-active{box-shadow:0 8px 32px #0f172a1a,0 0 0 3px color-mix(in oklab,var(--accent) 14%,transparent)}}.cheat-playlist-main{align-items:center;gap:12px;display:flex}.cheat-playlist-play{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:999px;flex-shrink:0;justify-content:center;align-items:center;width:44px;height:44px;transition:transform .12s,box-shadow .15s;display:inline-flex;box-shadow:0 2px 6px #0f172a2e}.cheat-playlist-play:hover{transform:scale(1.04)}.cheat-playlist-play:active{transform:scale(.96)}.cheat-playlist-play svg{width:18px;height:18px}.cheat-playlist-play svg.audio-play-triangle{margin-left:2px}.cheat-playlist-info{flex:1;gap:1px;min-width:0;display:grid}.cheat-playlist-eyebrow{text-transform:uppercase;letter-spacing:.06em;color:var(--subtle,#475569);align-items:center;gap:6px;font-size:.72rem;font-weight:700;display:inline-flex}.cheat-playlist-hd-tag{background:var(--accent);border-radius:4px;align-items:center;padding:1px 6px;display:inline-flex}@supports (color:color-mix(in lab,red,red)){.cheat-playlist-hd-tag{background:color-mix(in oklab,var(--accent) 14%,transparent)}}.cheat-playlist-hd-tag{color:var(--accent-strong,var(--accent));letter-spacing:.04em;font-size:.62rem;font-weight:800}.cheat-playlist-title{color:var(--foreground-strong,#0f172a);white-space:nowrap;text-overflow:ellipsis;font-size:.95rem;font-weight:720;line-height:1.3;overflow:hidden}.cheat-playlist-controls{flex-shrink:0;align-items:center;gap:4px;display:inline-flex}.cheat-playlist-btn{width:36px;height:36px;color:var(--foreground-strong,#0f172a);cursor:pointer;background:0 0;border:1px solid #0000;border-radius:8px;justify-content:center;align-items:center;padding:0;font-size:.78rem;font-weight:750;display:inline-flex;position:relative}.cheat-playlist-btn:hover:not(:disabled){background:var(--surface-strong,#f1f5f9);border-color:var(--border,#0f172a1f)}.cheat-playlist-btn:focus-visible{outline:2px solid var(--accent-strong,var(--accent));outline-offset:2px}.cheat-playlist-btn:disabled{opacity:.35;cursor:not-allowed}.cheat-playlist-btn svg{width:14px;height:14px}.cheat-playlist-prev svg{transform:scaleX(-1)}.cheat-playlist-flip{display:none}.cheat-playlist-play:focus-visible,.cheat-section-play:focus-visible{outline:2px solid var(--accent-strong,var(--accent));outline-offset:2px}.cheat-playlist-speed{width:auto;min-width:38px;padding:0 8px}.cheat-playlist-timeline{align-items:center;gap:8px;display:flex}.cheat-playlist-time{font-variant-numeric:tabular-nums;color:var(--subtle,#475569);text-align:center;min-width:32px;font-size:.72rem}.cheat-playlist-seek{appearance:none;background:linear-gradient(to right,var(--accent) 0,var(--accent) var(--audio-progress,0),var(--accent) var(--audio-progress,0),var(--accent) 100%);border-radius:999px;flex:1;height:4px}@supports (color:color-mix(in lab,red,red)){.cheat-playlist-seek{background:linear-gradient(to right,var(--accent) 0,var(--accent) var(--audio-progress,0),color-mix(in oklab,var(--accent) 14%,transparent) var(--audio-progress,0),color-mix(in oklab,var(--accent) 14%,transparent) 100%)}}.cheat-playlist-seek{cursor:pointer}.cheat-playlist-seek::-webkit-slider-thumb{appearance:none;background:var(--accent-strong,var(--accent));cursor:pointer;border:2px solid #fff;border-radius:999px;width:12px;height:12px;box-shadow:0 1px 3px #0f172a40}.cheat-playlist-seek::-moz-range-thumb{background:var(--accent-strong,var(--accent));cursor:pointer;border:2px solid #fff;border-radius:999px;width:12px;height:12px}.cheat-playlist-seek:disabled{cursor:not-allowed;opacity:.5}.cheat-section-play{border:1px solid var(--border,#0f172a24);color:var(--foreground-strong,#0f172a);cursor:pointer;background:0 0;border-radius:999px;align-items:center;gap:8px;padding:6px 12px 6px 8px;font-size:.78rem;font-weight:700;transition:background .15s,border-color .15s;display:inline-flex}.cheat-section-play:hover{background:var(--surface-strong,#f1f5f9);border-color:var(--accent)}@supports (color:color-mix(in lab,red,red)){.cheat-section-play:hover{border-color:color-mix(in oklab,var(--accent) 30%,var(--border,#0f172a24))}}.cheat-section-play svg{color:#fff;box-sizing:content-box;border-radius:999px;width:12px;height:12px;padding:4px}.cheat-section-play svg,.cheat-section-play.is-active{background:var(--accent)}@supports (color:color-mix(in lab,red,red)){.cheat-section-play.is-active{background:color-mix(in oklab,var(--accent) 12%,transparent)}}.cheat-section-play.is-active{border-color:var(--accent)}@supports (color:color-mix(in lab,red,red)){.cheat-section-play.is-active{border-color:color-mix(in oklab,var(--accent) 50%,transparent)}}.cheat-section-play.is-active{color:var(--accent-strong,var(--accent))}.cheat-section.is-now-playing .cheat-table-card{box-shadow:0 0 0 2px var(--accent),0 6px 18px #0f172a14}@supports (color:color-mix(in lab,red,red)){.cheat-section.is-now-playing .cheat-table-card{box-shadow:0 0 0 2px color-mix(in oklab,var(--accent) 45%,transparent),0 6px 18px #0f172a14}}.cheat-section.is-now-playing .cheat-table-card{transition:box-shadow .2s}.cheat-section{scroll-margin-top:160px}.cheat-playlist.is-playing .cheat-playlist-play{animation:cheat-playlist-pulse 1.8s ease-in-out infinite}@keyframes cheat-playlist-pulse{0%,to{box-shadow:0 0 0 0 color-mix(in oklab,var(--accent) 35%,transparent),0 2px 6px #0f172a2e}50%{box-shadow:0 0 0 6px color-mix(in oklab,var(--accent) 0%,transparent),0 2px 6px #0f172a2e}}@media (max-width:640px){.cheat-playlist{top:64px}.cheat-playlist-main{flex-wrap:wrap}.cheat-playlist-controls{order:3;justify-content:flex-end;width:100%}.cheat-playlist-title{white-space:normal}.cheat-section{scroll-margin-top:140px}.cheat-playlist-seek::-webkit-slider-thumb{width:20px;height:20px}.cheat-playlist-seek::-moz-range-thumb{width:20px;height:20px}}@media (prefers-reduced-motion:reduce){.audio-mini.is-playing,.cheat-playlist.is-playing .cheat-playlist-play{animation:none}.cheat-section.is-now-playing .cheat-table-card{transition:none}}.voice-picker{gap:var(--space-2);max-width:760px;display:grid}.voice-picker-head{gap:2px;display:grid}.voice-picker-label{color:var(--foreground-strong);font-size:.95rem;font-weight:720;line-height:1.25}.voice-count,.voice-helper,.voice-picker-subtitle{color:var(--muted);font-size:var(--text-small);line-height:1.45}.voice-select{border-radius:var(--radius-md);border:1px solid var(--border-strong);background:var(--surface-0);width:100%;min-width:0;color:var(--foreground-strong);min-height:44px;padding:10px 12px;font-size:.95rem;font-weight:500}.voice-select:disabled{color:var(--disabled);background:var(--surface-3)}.voice-helper{margin:0}.listen-language-toggle{align-items:center;gap:var(--space-2);width:fit-content;color:var(--foreground-strong);font-size:var(--text-small);cursor:pointer;font-weight:650;display:inline-flex}.listen-language-toggle input{accent-color:var(--accent)}.voice-count{color:var(--subtle);margin:0}.listen-samples{gap:var(--space-4);grid-template-columns:repeat(2,minmax(0,1fr));display:grid}.listen-sample-card{align-content:start;gap:var(--space-3);min-width:0;padding:var(--space-5);border:1px solid var(--border);border-radius:var(--radius-lg);background:var(--surface-0);box-shadow:var(--shadow-sm);display:grid}.listen-sample-head{align-items:center;gap:var(--space-2);min-width:0;display:flex}.listen-sample-kicker{width:28px;height:28px;color:var(--accent-strong);background:var(--accent-tint);border-radius:999px;flex:none;place-items:center;font-size:.8rem;font-weight:800;display:inline-grid}.listen-sample-title{min-width:0;color:var(--foreground-strong);font-size:1rem;font-weight:760;line-height:1.2}.listen-sample-copy{color:var(--muted);font-size:var(--text-small);line-height:1.45}.listen-sample-card .audio-player{border-radius:var(--radius-md);justify-content:flex-start;width:100%}.listen-coverage-grid{gap:var(--space-5);grid-template-columns:minmax(0,1.2fr) minmax(0,.8fr);display:grid}.listen-coverage-list{gap:var(--space-3);min-width:0;display:grid}.listen-coverage-list h3{color:var(--foreground-strong);font-size:.98rem;font-weight:760;line-height:1.25}.listen-coverage-list ul{gap:var(--space-2);margin:0;padding:0;list-style:none;display:grid}.listen-coverage-list li{padding:var(--space-3);border-radius:var(--radius-md);background:var(--surface-2);border:1px solid var(--border);gap:2px;display:grid}.listen-coverage-list strong{color:var(--foreground-strong);font-size:var(--text-small);font-weight:720}.listen-coverage-list span{color:var(--muted);font-size:var(--text-small);line-height:1.45}.audio-quality-chip{border:1px solid var(--border);background:var(--correct);color:var(--surface-0);box-shadow:var(--shadow-sm);letter-spacing:0;cursor:help;border-radius:999px;justify-content:center;align-items:center;margin-left:4px;padding:2px 6px;font-size:.62rem;font-weight:800;line-height:1;display:inline-flex}@media (max-width:640px){.listen-audio-system{gap:var(--space-4)}.listen-samples,.listen-status-panel{gap:var(--space-2)}.listen-sample-card,.listen-status-card{padding:var(--space-3)}.listen-status-card{flex-direction:column}.listen-status-icon{width:30px;height:30px}.listen-status-title{font-size:.72rem}.listen-status-value{font-size:.88rem}.listen-coverage-grid,.listen-preference-grid{grid-template-columns:1fr}.listen-sample-head{align-items:flex-start}.listen-sample-kicker{width:24px;height:24px;font-size:.72rem}.listen-sample-title{font-size:.9rem}.listen-sample-card .audio-player{padding:var(--space-2)}}.skip-link{z-index:1000;border-radius:var(--radius-md);background:var(--accent);color:#fff;box-shadow:var(--shadow-md);transition:top var(--duration-fast) var(--ease-standard);padding:10px 16px;font-weight:700;text-decoration:none;position:absolute;top:-100px;left:16px}.skip-link:focus,.skip-link:focus-visible{outline-offset:2px;outline:3px solid #fff;top:12px}.sr-only{clip:rect(0,0,0,0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.cheat-layout{gap:var(--space-6);grid-template-columns:1fr;align-items:start;display:grid}@media (min-width:960px){.cheat-layout{grid-template-columns:minmax(0,1fr) 240px}.cheat-toc{max-height:calc(100vh - 108px);padding:var(--space-4);position:sticky;top:88px;overflow-y:auto}}.cheat-toc{padding:var(--space-4);order:2}@media (min-width:960px){.cheat-toc{order:0}}.cheat-toc-title{text-transform:uppercase;letter-spacing:.12em;color:var(--subtle);margin-bottom:var(--space-2);font-size:.74rem;font-weight:750}.cheat-toc-list{flex-direction:column;gap:2px;display:flex}.cheat-toc-link{border-radius:var(--radius-sm);color:var(--muted);transition:background var(--duration-fast),color var(--duration-fast);background:0 0;border:none;padding:7px 10px;font-size:.85rem;text-decoration:none;display:block}.cheat-toc-link:hover{color:var(--foreground-strong);background:var(--paper)}.cheat-toc-link.is-active{color:var(--accent-strong);background:var(--accent-tint)}@media (max-width:959px){.cheat-toc-list{scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch;flex-direction:row;padding-bottom:4px;overflow-x:auto}.cheat-toc-link{scroll-snap-align:start;background:var(--surface-2);white-space:nowrap;border-radius:999px;flex:none;padding:6px 12px}}.timer{background:var(--surface-0);border:1px solid var(--border);color:var(--foreground-strong);font-variant-numeric:tabular-nums;letter-spacing:.02em;box-shadow:var(--shadow-xs);border-radius:999px;align-items:center;gap:6px;padding:4px 10px;font-size:.86rem;font-weight:700;display:inline-flex}.timer:before{content:"";background:var(--correct);border-radius:999px;width:6px;height:6px;display:inline-block;box-shadow:0 0 8px #15803d80}.timer.is-low{color:var(--wrong);background:var(--wrong-tint);border-color:#dc26264d;animation:timerPulse 1s ease-in-out infinite}.timer.is-low:before{background:var(--wrong);box-shadow:0 0 10px #dc262699}@keyframes timerPulse{0%,to{opacity:1}50%{opacity:.6}}@media (max-width:640px){.site-nav-link{min-height:40px;padding:0 11px}.icon-btn{width:44px;height:44px}.btn:disabled,.btn[aria-disabled=true]{color:#5e6470;background:var(--surface-3);border:1px solid var(--border-strong);opacity:1}}.btn:disabled,.btn[aria-disabled=true]{color:#5e6470;opacity:1}@media (max-width:640px){.stat-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.listen-status-grid,.listen-status-panel{grid-template-columns:1fr!important}}.cheat-detail,.cheat-table td.label,.cheat-table td.value{overflow-wrap:break-word;word-break:break-word}.site-footer-inner{align-items:stretch;gap:var(--space-6);flex-direction:column}.footer-cols{gap:var(--space-5);grid-template-columns:repeat(auto-fit,minmax(140px,1fr));display:grid}.footer-col{flex-direction:column;gap:6px;display:flex}.footer-col-title{letter-spacing:.12em;text-transform:uppercase;color:var(--subtle);margin-bottom:4px;font-size:.72rem;font-weight:750}.footer-col a{color:var(--muted);transition:color var(--duration-fast);padding:2px 0;font-size:.88rem;text-decoration:none}.footer-col a:hover{color:var(--accent-strong)}.footer-disclaimer{justify-content:space-between;align-items:center;gap:var(--space-4);padding-top:var(--space-4);border-top:1px solid var(--border);color:var(--subtle);font-size:var(--text-small);flex-wrap:wrap;display:flex}.support-card{gap:var(--space-4);padding:var(--space-5);border-radius:var(--radius-md);background:linear-gradient(135deg,var(--warm-tint) 0,var(--accent-tint) 100%);border:1px solid #d9770633;align-items:flex-start;display:flex}.support-icon{border-radius:var(--radius-md);width:48px;height:48px;color:var(--warm);box-shadow:var(--shadow-sm);background:#fff;flex:none;place-items:center;display:grid}@media (max-width:640px){.support-card{flex-direction:column}}.saved-to-review-chip{border-radius:var(--radius-md);background:var(--accent-tint);color:var(--accent-strong);width:fit-content;transition:background var(--duration-fast);border:1px solid #2563eb33;align-items:center;gap:8px;padding:8px 12px;font-size:.85rem;font-weight:600;text-decoration:none;display:inline-flex}.saved-to-review-chip:hover{background:#2563eb26;text-decoration:underline}.glossary-term{cursor:help;border-bottom:1.5px dotted var(--accent)!important}.glossary-term:hover{background:var(--accent-tint);border-bottom-style:solid!important}.glossary-empty{padding:var(--space-8);text-align:center;place-items:center;gap:var(--space-3);color:var(--muted);font-size:.95rem;display:grid}.email-link{color:var(--accent-strong);text-underline-offset:3px;transition:text-decoration-color var(--duration-fast);font-weight:600;-webkit-text-decoration:underline #2563eb66;text-decoration:underline #2563eb66}.email-link:hover{-webkit-text-decoration-color:var(--accent-strong);text-decoration-color:var(--accent-strong)}.nf-shell{min-height:calc(100vh - 200px);padding:var(--space-6) var(--space-4);place-items:center;display:grid;position:relative;overflow:hidden}.nf-grid{background-image:linear-gradient(90deg,#2563eb0d 1px,#0000 0),linear-gradient(#2563eb0d 1px,#0000 0),linear-gradient(90deg,#2563eb14 2px,#0000 0),linear-gradient(#2563eb14 2px,#0000 0);background-size:30px 30px,30px 30px,150px 150px,150px 150px;position:absolute;inset:0;-webkit-mask-image:radial-gradient(circle at 50% 40%,#000 30%,#0000 75%);mask-image:radial-gradient(circle at 50% 40%,#000 30%,#0000 75%)}.nf-grid,.nf-rings{pointer-events:none;z-index:0}.nf-rings{place-items:center;display:grid;position:absolute;inset:0}.nf-ring{border:2px solid #2563eb1f;border-radius:999px;animation:nf-ring-pulse 6s ease-in-out infinite;position:absolute}.nf-ring-1{width:320px;height:320px;animation-delay:0s}.nf-ring-2{border-color:#d977061a;width:460px;height:460px;animation-delay:2s}.nf-ring-3{border-style:dashed;width:620px;height:620px;animation-delay:4s}@keyframes nf-ring-pulse{0%,to{opacity:.6;transform:scale(1)}50%{opacity:1;transform:scale(1.03)}}.nf-card{z-index:1;width:100%;max-width:640px;padding:var(--space-6);gap:var(--space-5);text-align:center;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:var(--radius-xl);box-shadow:var(--shadow-lg),0 0 0 6px #2563eb0a;background:#fffffff5;border:1px solid #2563eb26;display:grid;position:relative}.nf-notam{border-radius:var(--radius-sm);background:var(--surface-2);border:1px solid var(--border-strong);font-family:var(--font-mono-stack);letter-spacing:.04em;color:var(--foreground-strong);align-self:center;align-items:center;gap:8px;padding:6px 10px;font-size:.72rem;display:inline-flex}.nf-notam-tag{background:var(--wrong);color:#fff;letter-spacing:.08em;border-radius:3px;padding:2px 7px;font-weight:700}.nf-notam-id{color:var(--accent-strong);font-weight:600}.nf-notam-time{color:var(--muted);font-weight:500}.nf-stage{padding:var(--space-3) 0;place-items:center;display:grid}.nf-drone{width:260px;max-width:80%;height:auto;animation:nf-bob 4s ease-in-out infinite}@keyframes nf-bob{0%,to{transform:translateY(0)rotate(-2deg)}50%{transform:translateY(-8px)rotate(2deg)}}.nf-prop{transform-origin:50%;animation:nf-spin .4s linear infinite}.nf-prop-rev{animation:nf-spin-rev .4s linear infinite}@keyframes nf-spin{0%{transform:rotate(0)}to{transform:rotate(1turn)}}@keyframes nf-spin-rev{0%{transform:rotate(0)}to{transform:rotate(-1turn)}}.nf-led{transform-origin:50%;animation:nf-led-pulse 1.2s ease-in-out infinite}@keyframes nf-led-pulse{0%,to{opacity:1}50%{opacity:.25}}.nf-copy{gap:var(--space-2);text-align:center;display:grid}.nf-eyebrow{width:fit-content;color:var(--wrong);margin:0 auto}.nf-title{letter-spacing:-.03em;font-size:clamp(2.4rem,5vw,3.5rem)}.nf-lede{margin:0 auto}.nf-actions{gap:var(--space-2);flex-wrap:wrap;justify-content:center;display:flex}.nf-tip{padding:var(--space-3) var(--space-4);border-radius:var(--radius-md);background:var(--accent-tint);border-left:3px solid var(--accent);color:var(--foreground);text-align:left;font-size:.88rem;line-height:1.6}.nf-tip strong{color:var(--accent-strong)}.nf-contact{color:var(--muted);margin:0;font-size:.8rem}@media (prefers-reduced-motion:reduce){.nf-drone,.nf-led,.nf-prop,.nf-prop-rev,.nf-ring{animation:none!important}}@media (max-width:640px){.nf-card{padding:var(--space-5) var(--space-4)}.nf-ring-3{width:480px;height:480px}.nf-actions .btn{flex:calc(50% - 4px);width:auto}}@media print{:root{--accent:#000;--accent-strong:#000;--border:#999}body,html{font-size:10.5pt;line-height:1.35;color:#000!important;background:#fff!important}@page{size:Letter;margin:.4in}.action-row,.audio-mini,.audio-player,.breadcrumb,.cheat-playlist,.cheat-section-play,.cheat-toc,.no-print,.quiz-nav,.site-footer,.site-header,.skip-link,nav{display:none!important}.cheat-layout,.page-shell{grid-template-columns:none!important;max-width:100%!important;margin:0!important;padding:0!important;display:block!important}.cheat-content{max-width:100%!important}.page-header{border-bottom:1.5pt solid #000;margin-bottom:10pt;padding-bottom:6pt}.page-title{color:#000!important;margin:0 0 2pt!important;font-size:18pt!important}.eyebrow,.lede{color:#555!important;margin:0!important;font-size:9pt!important}.eyebrow svg{display:none}.cheat-section{break-inside:avoid;page-break-inside:avoid;margin:6pt 0!important}.cheat-section-head{margin-bottom:3pt!important}.cheat-section-title{border-bottom:.75pt solid #000;padding-bottom:2pt;color:#000!important;margin:0!important;font-size:12pt!important;font-weight:800!important}.cheat-table-card{box-shadow:none!important;background:0 0!important;border:none!important;border-radius:0!important;padding:0!important}.cheat-table{font-size:9.5pt;border-collapse:collapse!important;width:100%!important}.cheat-table td{vertical-align:top!important;border-bottom:.3pt dotted #999!important;padding:2pt 4pt 2pt 0!important}.cheat-table td.label{white-space:nowrap;width:34%;color:#000!important;padding-right:8pt!important;font-weight:700!important}.cheat-table td.value{color:#000!important}.cheat-disclosure{display:none!important}.cheat-detail-row{display:table-row!important}.cheat-detail{border-left:1pt solid #999;color:#333!important;background:#f5f5f5!important;padding:2pt 4pt 4pt 8pt!important;font-size:8.5pt!important}.citation-chip{color:#333!important;box-shadow:none!important;background:0 0!important;border:.5pt solid #666!important;padding:0 3pt!important;font-size:8pt!important}.cheat-content{column-count:2;column-fill:balance;column-gap:12pt}.cheat-section{break-inside:avoid-column}a,a:visited{color:#000!important;text-decoration:none!important}}.cheat-header-actions{flex-wrap:wrap;gap:8px;margin-top:12px;display:flex}.print-btn{border:1px solid var(--border,#0f172a24);color:var(--foreground-strong,#0f172a);cursor:pointer;background:0 0;border-radius:999px;align-items:center;gap:6px;padding:6px 12px;font-size:.78rem;font-weight:700;transition:background .15s,border-color .15s;display:inline-flex}.print-btn:hover{background:var(--surface-strong,#f1f5f9);border-color:var(--accent)}@supports (color:color-mix(in lab,red,red)){.print-btn:hover{border-color:color-mix(in oklab,var(--accent) 30%,var(--border,#0f172a24))}}.print-btn svg{width:14px;height:14px}.exam-mix-banner{background:var(--accent);border-radius:12px;padding:10px 16px}@supports (color:color-mix(in lab,red,red)){.exam-mix-banner{background:color-mix(in oklab,var(--accent) 8%,var(--surface,#fff))}}.exam-mix-banner{border:1px solid var(--accent)}@supports (color:color-mix(in lab,red,red)){.exam-mix-banner{border:1px solid color-mix(in oklab,var(--accent) 24%,transparent)}}.exam-mix-banner{gap:2px;margin-bottom:12px;display:grid}.exam-mix-banner .eyebrow{letter-spacing:.06em;text-transform:uppercase;color:var(--accent-strong,var(--accent));font-size:.7rem;font-weight:800}.exam-mix-line{color:var(--foreground-strong,#0f172a);font-size:.86rem;font-weight:600}.exam-mode-footnote{background:var(--surface,#fff);border:1px dashed var(--border,#0f172a24);color:var(--subtle,#475569);border-radius:12px;align-items:flex-start;gap:10px;margin-top:16px;padding:14px 18px;font-size:.85rem;line-height:1.5;display:flex}.exam-mode-footnote svg{width:16px;height:16px;color:var(--accent,#2563eb);flex-shrink:0;margin-top:2px}.drill-shell{max-width:900px}.drill-builder{gap:var(--space-4);display:grid}.drill-quick{background:linear-gradient(135deg,var(--accent) 0,var(--surface,#fff) 100%);padding:20px 22px}@supports (color:color-mix(in lab,red,red)){.drill-quick{background:linear-gradient(135deg,color-mix(in oklab,var(--accent) 10%,var(--surface,#fff)) 0,var(--surface,#fff) 100%)}}.drill-quick{border:1px solid var(--accent)}@supports (color:color-mix(in lab,red,red)){.drill-quick{border:1px solid color-mix(in oklab,var(--accent) 24%,transparent)}}.drill-quick{gap:14px;display:grid}.drill-quick-head{gap:4px;display:grid}.drill-quick-actions{flex-wrap:wrap;gap:8px;display:flex}.drill-panel{gap:16px;padding:22px;display:grid}.drill-panel-head{gap:4px;margin-bottom:4px;display:grid}.drill-filter{gap:6px;display:grid}.drill-filter-label{letter-spacing:.06em;text-transform:uppercase;color:var(--subtle,#475569);font-size:.75rem;font-weight:800}.drill-chip-row{flex-wrap:wrap;gap:6px;display:flex}.drill-chip{background:var(--surface,#fff);border:1px solid var(--border,#0f172a24);color:var(--foreground-strong,#0f172a);cursor:pointer;border-radius:999px;padding:6px 12px;font-size:.82rem;font-weight:650;transition:background .12s,border-color .12s,color .12s}.drill-chip:hover{border-color:var(--accent)}@supports (color:color-mix(in lab,red,red)){.drill-chip:hover{border-color:color-mix(in oklab,var(--accent) 40%,var(--border,#0f172a24))}}.drill-chip:focus-visible{outline:2px solid var(--accent-strong,var(--accent));outline-offset:2px}.drill-chip.is-active,.drill-chip[aria-checked=true],.drill-chip[aria-pressed=true]{background:var(--accent);border-color:var(--accent);color:#fff}.drill-summary{background:var(--surface-strong,#f1f5f9);color:var(--foreground-strong,#0f172a);border-radius:8px;padding:10px 14px;font-size:.88rem}.drill-summary strong{color:var(--accent-strong,var(--accent))}.drill-empty{color:var(--subtle,#475569);margin:4px 0 0;font-size:.86rem}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-ordinal{syntax:"*";inherits:false}@property --tw-slashed-zero{syntax:"*";inherits:false}@property --tw-numeric-figure{syntax:"*";inherits:false}@property --tw-numeric-spacing{syntax:"*";inherits:false}@property --tw-numeric-fraction{syntax:"*";inherits:false}@property --tw-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-shadow-color{syntax:"*";inherits:false}@property --tw-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-inset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-shadow-color{syntax:"*";inherits:false}@property --tw-inset-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-ring-color{syntax:"*";inherits:false}@property --tw-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-ring-color{syntax:"*";inherits:false}@property --tw-inset-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-ring-inset{syntax:"*";inherits:false}@property --tw-ring-offset-width{syntax:"<length>";inherits:false;initial-value:0}@property --tw-ring-offset-color{syntax:"*";inherits:false;initial-value:#fff}@property --tw-ring-offset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-outline-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}@property --tw-backdrop-blur{syntax:"*";inherits:false}@property --tw-backdrop-brightness{syntax:"*";inherits:false}@property --tw-backdrop-contrast{syntax:"*";inherits:false}@property --tw-backdrop-grayscale{syntax:"*";inherits:false}@property --tw-backdrop-hue-rotate{syntax:"*";inherits:false}@property --tw-backdrop-invert{syntax:"*";inherits:false}@property --tw-backdrop-opacity{syntax:"*";inherits:false}@property --tw-backdrop-saturate{syntax:"*";inherits:false}@property --tw-backdrop-sepia{syntax:"*";inherits:false}