:root{--ds-background-100:#ffffff;--ds-background-200:#fafafa;--ds-gray-100:#f2f2f2;--ds-gray-200:#ebebeb;--ds-gray-300:#e6e6e6;--ds-gray-400:#ebebeb;--ds-gray-500:#c9c9c9;--ds-gray-600:#a8a8a8;--ds-gray-700:#8f8f8f;--ds-gray-800:#7d7d7d;--ds-gray-900:#666666;--ds-gray-1000:#171717;--ds-gray-alpha-100:rgba(0,0,0,0.05);--ds-gray-alpha-200:rgba(0,0,0,0.08);--ds-gray-alpha-300:rgba(0,0,0,0.10);--ds-gray-alpha-400:rgba(0,0,0,0.08);--ds-gray-alpha-500:rgba(0,0,0,0.21);--ds-gray-alpha-600:rgba(0,0,0,0.34);--ds-gray-alpha-700:rgba(0,0,0,0.44);--ds-gray-alpha-800:rgba(0,0,0,0.51);--ds-gray-alpha-900:rgba(0,0,0,0.61);--ds-gray-alpha-1000:rgba(0,0,0,0.91);--ds-blue-100:#f2f2f2;--ds-blue-200:#ebebeb;--ds-blue-300:#e6e6e6;--ds-blue-400:#d4d4d4;--ds-blue-500:#c9c9c9;--ds-blue-600:#a8a8a8;--ds-blue-700:#8f8f8f;--ds-blue-800:#7d7d7d;--ds-blue-900:#666666;--ds-blue-1000:#171717;--ds-red-100:#fff0f0;--ds-red-200:#ffebeb;--ds-red-300:#ffe5e5;--ds-red-400:#ffd6d6;--ds-red-500:#fca5a5;--ds-red-600:#f17676;--ds-red-700:#e5484d;--ds-red-800:#c93a3e;--ds-red-900:#a2282c;--ds-red-1000:#451416;--ds-green-100:#effdf3;--ds-green-200:#e6fbf0;--ds-green-300:#d7f7e6;--ds-green-400:#b6f0cd;--ds-green-500:#6ee79e;--ds-green-600:#2fce71;--ds-green-700:#14ae5a;--ds-green-800:#0f923f;--ds-green-900:#0f752f;--ds-green-1000:#00331a;--ds-amber-100:#fff8eb;--ds-amber-200:#fff3d6;--ds-amber-300:#ffeebf;--ds-amber-400:#ffe3a3;--ds-amber-500:#fac368;--ds-amber-600:#f5a623;--ds-amber-700:#e29506;--ds-amber-800:#b57204;--ds-amber-900:#8a5604;--ds-amber-1000:#3c2602;--font-sans:'Geist',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen,Ubuntu,Cantarell,'Helvetica Neue',sans-serif;--font-mono:'Geist Mono',ui-monospace,SFMono-Regular,'Roboto Mono',Menlo,Monaco,Consolas,'Liberation Mono',monospace;--radius-none:0px;--radius-xs:4px;--radius-sm:6px;--radius-md:8px;--radius-lg:12px;--radius-xl:16px;--radius-pill-sm:64px;--radius-pill:100px;--radius-full:9999px;--space-xxs:4px;--space-xs:8px;--space-sm:12px;--space-md:16px;--space-lg:24px;--space-xl:32px;--space-2xl:40px;--space-3xl:48px;--space-4xl:64px;--space-5xl:96px;--space-6xl:128px;--space-section:192px;--bg-primary:var(--ds-background-200);--bg-secondary:var(--ds-background-100);--bg-tertiary:var(--ds-gray-100);--text-primary:var(--ds-gray-1000);--text-secondary:var(--ds-gray-900);--text-tertiary:var(--ds-gray-700);--border:var(--ds-gray-alpha-400);--color-canvas:var(--ds-background-100);--color-canvas-soft:var(--ds-background-200);--color-canvas-soft-2:var(--ds-gray-100);--color-ink:var(--ds-gray-1000);--color-body:var(--ds-gray-900);--color-mute:var(--ds-gray-700);--color-hairline:var(--ds-gray-alpha-400);--color-hairline-strong:var(--ds-gray-alpha-600);--color-link:#0070f3;--color-link-deep:#0761d1;--color-link-bg-soft:var(--ds-gray-100);--color-primary:#171717;--color-on-primary:#ffffff;--color-correct:var(--ds-green-700);--color-incorrect:var(--ds-red-700);--color-current:var(--ds-gray-1000);--color-error:var(--ds-red-700);--color-error-soft:var(--ds-red-100);--color-error-deep:var(--ds-red-900);--color-warning:var(--ds-amber-700);--color-warning-soft:var(--ds-amber-100);--color-warning-deep:var(--ds-amber-900);--color-selection-bg:var(--ds-gray-1000);--color-selection-fg:var(--ds-background-100);--shadow-none:0 0 0 transparent;--shadow-inset-1:inset 0 0 0 1px var(--ds-gray-alpha-200);--shadow-level-2:0px 1px 2px var(--ds-gray-alpha-200);--shadow-level-3:0px 4px 6px -1px var(--ds-gray-alpha-200),0px 2px 4px -2px var(--ds-gray-alpha-200);--shadow-level-4:0px 10px 15px -3px var(--ds-gray-alpha-200),0px 4px 6px -4px var(--ds-gray-alpha-200);--shadow-level-5:0px 20px 25px -5px var(--ds-gray-alpha-300),0px 8px 10px -6px var(--ds-gray-alpha-200);--shadow-focus:0 0 0 2px var(--ds-background-100),0 0 0 4px var(--ds-gray-1000)}[data-theme="dark"]{--ds-background-100:#0a0a0a;--ds-background-200:#000000;--ds-gray-100:#1a1a1a;--ds-gray-200:#1f1f1f;--ds-gray-300:#292929;--ds-gray-400:#2e2e2e;--ds-gray-500:#454545;--ds-gray-600:#5e5e5e;--ds-gray-700:#7d7d7d;--ds-gray-800:#a3a3a3;--ds-gray-900:#c4c4c4;--ds-gray-1000:#ededed;--ds-gray-alpha-100:rgba(255,255,255,0.05);--ds-gray-alpha-200:rgba(255,255,255,0.08);--ds-gray-alpha-300:rgba(255,255,255,0.10);--ds-gray-alpha-400:rgba(255,255,255,0.08);--ds-gray-alpha-500:rgba(255,255,255,0.21);--ds-gray-alpha-600:rgba(255,255,255,0.34);--ds-gray-alpha-700:rgba(255,255,255,0.44);--ds-gray-alpha-800:rgba(255,255,255,0.51);--ds-gray-alpha-900:rgba(255,255,255,0.61);--ds-gray-alpha-1000:rgba(255,255,255,0.91);--ds-blue-100:#1a1a1a;--ds-blue-200:#1f1f1f;--ds-blue-300:#292929;--ds-blue-400:#2e2e2e;--ds-blue-500:#454545;--ds-blue-600:#5e5e5e;--ds-blue-700:#a3a3a3;--ds-blue-800:#c4c4c4;--ds-blue-900:#d4d4d4;--ds-blue-1000:#f5f5f5;--ds-red-100:#330d0f;--ds-red-200:#3d0f12;--ds-red-300:#4c1115;--ds-red-400:#611417;--ds-red-500:#9d1d22;--ds-red-600:#d24a4e;--ds-red-700:#ff5c5f;--ds-red-800:#ff8486;--ds-red-900:#ffb4b5;--ds-red-1000:#ffecec;--ds-green-100:#062314;--ds-green-200:#082b18;--ds-green-300:#0b3a20;--ds-green-400:#0f532b;--ds-green-500:#167c42;--ds-green-600:#1fa158;--ds-green-700:#4cc38a;--ds-green-800:#7ee2b0;--ds-green-900:#b6f0d1;--ds-green-1000:#e9fdf3;--ds-amber-100:#2e1d00;--ds-amber-200:#3a2400;--ds-amber-300:#4a2f00;--ds-amber-400:#5e3c00;--ds-amber-500:#855500;--ds-amber-600:#b37400;--ds-amber-700:#f5a623;--ds-amber-800:#ffc251;--ds-amber-900:#ffdd99;--ds-amber-1000:#fff4e0;--bg-primary:var(--ds-background-200);--bg-secondary:var(--ds-background-100);--bg-tertiary:var(--ds-gray-100);--text-primary:var(--ds-gray-1000);--text-secondary:var(--ds-gray-900);--text-tertiary:var(--ds-gray-700);--border:var(--ds-gray-alpha-400);--color-canvas:var(--ds-background-100);--color-canvas-soft:var(--ds-background-200);--color-canvas-soft-2:var(--ds-gray-100);--color-ink:var(--ds-gray-1000);--color-body:var(--ds-gray-900);--color-mute:var(--ds-gray-700);--color-hairline:var(--ds-gray-alpha-400);--color-hairline-strong:var(--ds-gray-alpha-600);--color-link:#0070f3;--color-link-deep:#0761d1;--color-link-bg-soft:rgba(100,100,100,0.15);--color-primary:#ffffff;--color-on-primary:#171717;--color-correct:var(--ds-green-700);--color-incorrect:var(--ds-red-700);--color-current:var(--ds-gray-1000);--color-error:var(--ds-red-700);--color-error-soft:rgba(255,92,95,0.12);--color-error-deep:var(--ds-red-900);--color-warning:var(--ds-amber-700);--color-warning-soft:rgba(245,166,35,0.12);--color-warning-deep:var(--ds-amber-900);--color-selection-bg:var(--ds-gray-1000);--color-selection-fg:var(--ds-background-100);--shadow-inset-1:inset 0 0 0 1px var(--ds-gray-alpha-200);--shadow-level-2:0px 1px 2px rgba(0,0,0,0.4);--shadow-level-3:0px 4px 6px -1px rgba(0,0,0,0.5),0px 2px 4px -2px rgba(0,0,0,0.5);--shadow-level-4:0px 10px 15px -3px rgba(0,0,0,0.5),0px 4px 6px -4px rgba(0,0,0,0.5);--shadow-level-5:0px 20px 25px -5px rgba(0,0,0,0.6),0px 8px 10px -6px rgba(0,0,0,0.5);--shadow-focus:0 0 0 2px var(--ds-background-100),0 0 0 4px var(--ds-gray-1000)}[data-theme="dark"] body::before{background:radial-gradient(48rem 48rem at 8% -8%,rgba(100,100,100,0.08),transparent 60%),radial-gradient(42rem 42rem at 108% 4%,rgba(168,85,247,0.06),transparent 58%),radial-gradient(40rem 40rem at 50% 120%,rgba(76,195,138,0.05),transparent 60%)}*{-webkit-tap-highlight-color:transparent;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:var(--font-sans);background:var(--color-canvas-soft);color:var(--color-ink);position:relative;min-height:100vh;line-height:1.5;letter-spacing:-0.011em;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility;font-feature-settings:"liga" 1,"calt" 1}body::before{content:'';position:fixed;inset:0;z-index:-1;pointer-events:none;background:radial-gradient(48rem 48rem at 8% -8%,rgba(0,114,245,0.05),transparent 60%),radial-gradient(42rem 42rem at 108% 4%,rgba(168,85,247,0.04),transparent 58%),radial-gradient(40rem 40rem at 50% 120%,rgba(20,174,90,0.04),transparent 60%);transition:opacity 0.4s ease}::selection{background:var(--color-selection-bg);color:var(--color-selection-fg)}.font-mono,.font-mono *{font-family:var(--font-mono)}.text-display .word{display:inline-block;white-space:pre-wrap;-webkit-user-select:none;user-select:none}.text-display .char{position:relative;transition:color 0.08s ease;white-space:pre-wrap}.text-display .char.space{white-space:pre-wrap}.text-display .char.correct{color:var(--color-correct)}.text-display .char.wrong{color:var(--color-incorrect)}.text-display .char.current{color:var(--color-current);border-radius:var(--radius-xs)}.text-display .char.current::after{content:'';position:absolute;left:0;bottom:-2px;width:100%;height:2px;background:var(--color-current);border-radius:var(--radius-xs);animation:blink 1s infinite}.theme-toggle .icon-sun{display:none}[data-theme="dark"] .theme-toggle .icon-sun{display:block}[data-theme="dark"] .theme-toggle .icon-moon{display:none}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-xs);font-family:var(--font-sans);font-weight:500;line-height:1.25;border-radius:var(--radius-sm);border:1px solid transparent;cursor:pointer;transition:all 0.15s ease;text-decoration:none;white-space:nowrap}.btn-primary{background:var(--color-primary);color:var(--color-on-primary);border-color:var(--color-primary)}.btn-primary:hover{background:#2a2a2a;border-color:#2a2a2a}.btn-secondary{background:var(--color-canvas);color:var(--color-ink);border-color:var(--color-hairline)}.btn-secondary:hover{background:var(--color-canvas-soft)}.btn-ghost{background:var(--color-canvas);color:var(--color-ink);border-color:var(--color-hairline)}.btn-ghost:hover{background:var(--color-canvas-soft)}.btn-pill{border-radius:var(--radius-pill)}.btn-pill-sm{border-radius:var(--radius-pill-sm)}.btn-md{height:36px;padding:0 var(--space-md);font-size:0.875rem}.btn-sm{height:28px;padding:0 var(--space-sm);font-size:0.75rem}.btn-lg{height:44px;padding:0 var(--space-lg);font-size:1rem;border-radius:var(--radius-pill)}.card{background:var(--color-canvas);color:var(--color-ink);border-radius:var(--radius-md);border:1px solid var(--border);box-shadow:var(--shadow-level-2);transition:box-shadow 0.3s ease,border-color 0.3s ease,transform 0.3s ease}.card:hover{box-shadow:var(--shadow-level-3)}.card-elevated{box-shadow:var(--shadow-level-3);border-radius:var(--radius-lg)}.card-floating{box-shadow:var(--shadow-level-4);border-radius:var(--radius-lg)}.form-input{background:var(--color-canvas);color:var(--color-ink);border:1px solid var(--color-hairline);border-radius:var(--radius-sm);padding:0 var(--space-sm);font-family:var(--font-sans);font-size:0.875rem;height:40px;outline:none;transition:border-color 0.15s ease,box-shadow 0.15s ease}.form-input:focus{border-color:var(--ds-gray-1000);box-shadow:0 0 0 1px var(--ds-gray-1000)}.form-input::placeholder{color:var(--color-mute)}.badge{display:inline-flex;align-items:center;height:24px;padding:0 var(--space-xs);border-radius:var(--radius-full);background:var(--ds-gray-alpha-100);color:var(--ds-gray-900);font-size:0.75rem;font-weight:500;line-height:1.25}.badge-soft{background:var(--color-canvas-soft)}@keyframes fadeUp{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:translateY(0)}}header,main{animation:fadeUp 0.6s cubic-bezier(0.22,1,0.36,1) both}main{animation-delay:0.08s}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:var(--color-body)}.content-card{background:var(--color-canvas);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-level-2);padding:var(--space-md);transition:border-color 0.3s ease,box-shadow 0.3s ease}@media (min-width:640px){.content-card{padding:var(--space-xl)}}.content-card:hover{box-shadow:var(--shadow-level-3)}.content-card .legal-h1{font-size:1.6rem;font-weight:600;color:var(--color-ink);letter-spacing:-0.6px;margin:0 0 var(--space-xs);font-family:var(--font-sans)}@media (min-width:640px){.content-card .legal-h1{font-size:2rem}}.content-card .legal-updated{font-size:0.75rem;color:var(--color-mute);margin:0 0 var(--space-lg);font-family:var(--font-mono)}.content-card .legal-h2{font-size:1.15rem;font-weight:600;color:var(--color-ink);letter-spacing:-0.3px;margin:var(--space-xl) 0 var(--space-sm);font-family:var(--font-sans)}.content-card .legal-h2:first-of-type{margin-top:var(--space-lg)}.content-card p{font-size:0.9rem;line-height:1.65;color:var(--color-body);margin:0 0 var(--space-sm);font-family:var(--font-sans)}.content-card ul{margin:0 0 var(--space-md);padding-left:var(--space-lg)}.content-card li{font-size:0.9rem;line-height:1.65;color:var(--color-body);margin-bottom:var(--space-xs);font-family:var(--font-sans)}.content-card a.legal-link{color:var(--color-link);text-decoration:underline;text-underline-offset:2px}.content-card a.legal-link:hover{color:var(--color-link-deep)}.content-card strong{color:var(--color-ink);font-weight:600}.site-footer-nav{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:var(--space-xs) var(--space-lg)}.site-footer-nav a{font-size:0.75rem;color:var(--color-body);transition:color 0.15s ease;font-family:var(--font-sans)}.site-footer-nav a:hover{color:var(--color-link)}.site-footer-nav .sep{color:var(--color-hairline-strong);user-select:none}.contact-field{display:flex;flex-direction:column;gap:6px;margin-bottom:var(--space-md)}.contact-field label{font-size:0.8rem;font-weight:600;color:var(--color-ink);font-family:var(--font-sans)}.contact-field input,.contact-field textarea{width:100%;background:var(--color-canvas);color:var(--color-ink);border:1px solid var(--color-hairline);border-radius:var(--radius-sm);padding:10px 14px;font-size:0.9rem;font-family:var(--font-sans);outline:none;transition:border-color 0.15s ease,box-shadow 0.15s ease}.contact-field textarea{min-height:120px;resize:vertical}.contact-field input:focus,.contact-field textarea:focus{border-color:var(--ds-gray-1000);box-shadow:0 0 0 1px var(--ds-gray-1000)}.contact-field input::placeholder,.contact-field textarea::placeholder{color:var(--color-mute)}.contact-submit{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-xs);background:var(--color-primary);color:var(--color-on-primary);border:1px solid var(--color-primary);border-radius:var(--radius-pill);padding:0 var(--space-lg);height:44px;font-size:0.95rem;font-weight:500;font-family:var(--font-sans);cursor:pointer;transition:all 0.15s ease}.contact-submit:hover{background:#2a2a2a;border-color:#2a2a2a}.contact-note{font-size:0.78rem;color:var(--color-mute);margin-top:var(--space-sm);font-family:var(--font-sans)}.contact-info{display:grid;grid-template-columns:1fr;gap:var(--space-sm);margin-bottom:var(--space-lg)}@media (min-width:480px){.contact-info{grid-template-columns:1fr 1fr}}.contact-info-item{background:var(--color-canvas-soft);border:1px solid var(--border);border-radius:var(--radius-md);padding:var(--space-md)}.contact-info-item .label{display:block;font-size:0.7rem;font-weight:600;text-transform:uppercase;letter-spacing:0.04em;color:var(--color-mute);margin-bottom:4px;font-family:var(--font-sans)}.contact-info-item .value{font-size:0.9rem;color:var(--color-ink);font-family:var(--font-mono);word-break:break-all}.error-code{font-family:var(--font-mono);font-size:clamp(4rem,18vw,7rem);font-weight:600;line-height:1;letter-spacing:-0.04em;color:var(--ds-gray-1000);-webkit-text-fill-color:var(--ds-gray-1000)}@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:0.001ms !important;animation-iteration-count:1 !important;transition-duration:0.001ms !important}}@media (max-width:480px){}html,body{overflow-x:hidden;width:100%}@media (max-width:640px){.w-full.max-w-2xl{max-width:100%}header h1{font-size:1.5rem}header .theme-toggle,header button[aria-label]{width:44px;height:44px}.site-footer-nav{gap:6px 12px}}@media (max-width:380px){}.related-section{margin-top:var(--space-xl);padding-top:var(--space-lg);border-top:1px solid var(--border)}.related-section h3{font-size:0.8rem;font-weight:600;text-transform:uppercase;letter-spacing:0.08em;color:var(--color-mute);margin:0 0 var(--space-md);font-family:var(--font-sans)}.related-grid{display:grid;grid-template-columns:1fr;gap:var(--space-sm)}@media (min-width:480px){.related-grid{grid-template-columns:1fr 1fr}}.related-link{display:flex;align-items:center;gap:var(--space-sm);padding:var(--space-sm) var(--space-md);background:var(--color-canvas);border:1px solid var(--border);border-radius:var(--radius-sm);text-decoration:none;color:var(--color-ink);font-size:0.9rem;font-weight:500;transition:all 0.15s ease;font-family:var(--font-sans)}.related-link:hover{border-color:var(--color-link);color:var(--color-link);box-shadow:var(--shadow-level-2)}.related-link .related-icon{font-size:1.1rem;flex-shrink:0}.lesson-nav{display:flex;align-items:center;justify-content:space-between;gap:var(--space-md);margin-top:var(--space-lg);padding:var(--space-md) 0;border-top:1px solid var(--border)}.lesson-nav-btn{display:inline-flex;align-items:center;gap:var(--space-xs);padding:var(--space-sm) var(--space-md);background:var(--color-canvas);border:1px solid var(--border);border-radius:var(--radius-sm);text-decoration:none;color:var(--color-ink);font-size:0.85rem;font-weight:500;transition:all 0.15s ease;font-family:var(--font-sans)}.lesson-nav-btn:hover{border-color:var(--color-link);color:var(--color-link)}.lesson-nav-btn.prev{flex-direction:row}.lesson-nav-btn.next{flex-direction:row-reverse;margin-left:auto}.lesson-nav-count{font-size:0.75rem;color:var(--color-mute);text-align:center;font-family:var(--font-mono)}.blog-post-nav{display:flex;align-items:center;justify-content:space-between;gap:var(--space-md);margin-top:var(--space-lg);padding:var(--space-md) 0;border-top:1px solid var(--border)}.cta-section{margin-top:var(--space-xl);padding:var(--space-lg);background:var(--color-canvas);border:1px solid var(--border);border-radius:var(--radius-md);text-align:center}.cta-section p{margin:0 0 var(--space-md);font-size:0.95rem;font-weight:500;color:var(--color-ink);font-family:var(--font-sans)}.cta-section .contact-submit{display:inline-flex}.w-full{width:100%}.max-w-2xl{max-width:42rem}.max-w-sm{max-width:24rem}.flex{display:flex}.flex-1{flex:1 1 0%}.flex-col{flex-direction:column}.flex-wrap{flex-wrap:wrap}.inline-flex{display:inline-flex}.items-center{align-items:center}.justify-between{justify-content:space-between}.justify-center{justify-content:center}.relative{position:relative}.hidden{display:none}.text-center{text-align:center}.min-w-0{min-width:0}.grid{display:grid}.p-2{padding:0.5rem}.sm\:p-3{padding:0.75rem}.p-4{padding:1rem}.px-4{padding-left:1rem;padding-right:1rem}.sm\:px-6{padding-left:1.5rem;padding-right:1.5rem}.py-10{padding-top:2.5rem;padding-bottom:2.5rem}.mt-1{margin-top:0.25rem}.mt-2{margin-top:0.5rem}.mt-4{margin-top:1rem}.mt-5{margin-top:1.25rem}.mt-6{margin-top:1.5rem}.mt-8{margin-top:2rem}.mb-0{margin-bottom:0}.mb-2{margin-bottom:0.5rem}.mb-5{margin-bottom:1.25rem}.ml-3{margin-left:0.75rem}.gap-3{gap:0.75rem}.gap-4{gap:1rem}.gap-6{gap:1.5rem}.pt-4{padding-top:1rem}.text-2xl{font-size:1.5rem}.sm\:text-2xl{font-size:1.25rem}.text-sm{font-size:0.875rem}.text-xs{font-size:0.75rem}.text-base{font-size:1rem}.text-lg{font-size:1.125rem}.text-xl{font-size:1.25rem}.text-\[10px\]{font-size:10px}.text-\[var\(--color-body\)\]{color:var(--color-body)}.text-\[var\(--color-ink\)\]{color:var(--color-ink)}.text-\[var\(--color-mute\)\]{color:var(--color-mute)}.text-\[var\(--color-link\)\]{color:var(--color-link)}.text-\[var\(--ds-amber-700\)\]{color:var(--ds-amber-700)}.text-\[var\(--ds-amber-600\)\]{color:var(--ds-amber-600)}.bg-\[var\(--color-canvas\)\]{background-color:var(--color-canvas)}.bg-\[var\(--color-canvas-soft\)\]{background-color:var(--color-canvas-soft)}.border-\[var\(--border\)\]{border-color:var(--border)}.border-\[var\(--color-link\)\]{border-color:var(--color-link)}.border{border-width:1px;border-style:solid}.border-t{border-top-width:1px;border-top-style:solid}.rounded-xl{border-radius:var(--radius-xl)}.rounded-lg{border-radius:var(--radius-lg)}.rounded-sm{border-radius:var(--radius-sm)}.rounded-full{border-radius:var(--radius-full)}.shadow-sm{box-shadow:var(--shadow-level-2)}.shadow-md{box-shadow:var(--shadow-level-3)}.transition-all{transition-property:all;transition-timing-function:cubic-bezier(0.4,0,0.2,1);transition-duration:150ms}.transition-colors{transition-property:color,background-color,border-color,text-decoration-color,fill,stroke;transition-timing-function:cubic-bezier(0.4,0,0.2,1);transition-duration:150ms}.duration-300{transition-duration:300ms}.hover\:text-\[var\(--color-link\)\]:hover{color:var(--color-link)}.hover\:border-\[var\(--color-link\)\]:hover{border-color:var(--color-link)}.hover\:shadow-md:hover{box-shadow:var(--shadow-level-3)}.active\:scale-95:active{transform:scale(0.95)}.font-semibold{font-weight:600}.tracking-tight{letter-spacing:-0.025em}.tracking-widest{letter-spacing:0.08em}.uppercase{text-transform:uppercase}.h-10{height:2.5rem}.w-10{width:2.5rem}.min-h-screen{min-height:100vh}.font-mono{font-family:var(--font-mono)}.font-sans{font-family:var(--font-sans)}
/* === FAQ SECTION === */
.faq-section-header{padding:var(--space-md) var(--space-lg);border-bottom:1px solid var(--border)}
.faq-section-header span{display:block}
.faq-section-header .faq-eyebrow{font-size:.65rem;font-weight:600;text-transform:uppercase;letter-spacing:.08em;color:var(--color-mute);margin-bottom:2px}
.faq-section-header .faq-title{font-size:.95rem;font-weight:600;color:var(--color-ink);letter-spacing:-.3px}
#faqList{display:flex;flex-direction:column;gap:var(--space-sm)}
.faq-item{background:var(--color-canvas);border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease}
.faq-item:hover{border-color:var(--color-link)}
.faq-item.open{border-color:var(--color-link);box-shadow:var(--shadow-level-2)}
.faq-question{width:100%;display:flex;align-items:center;justify-content:space-between;gap:var(--space-md);padding:var(--space-md) var(--space-lg);background:0 0;border:none;cursor:pointer;text-align:left;font-family:var(--font-sans);font-size:.95rem;font-weight:600;line-height:1.4;color:var(--color-ink);transition:color .15s ease;-webkit-tap-highlight-color:transparent}
.faq-question-text{flex:1;min-width:0;display:flex;align-items:center;gap:var(--space-sm)}
.faq-number{display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;border-radius:var(--radius-full);background:var(--color-canvas-soft);border:1px solid var(--border);font-family:var(--font-mono);font-size:.7rem;font-weight:600;color:var(--color-mute);flex-shrink:0;transition:all .2s ease}
.faq-item.open .faq-number,.faq-item:hover .faq-number{background:var(--color-link);border-color:var(--color-link);color:#fff}
.faq-question:hover{color:var(--color-link)}
.faq-question:focus-visible{outline:2px solid var(--color-link);outline-offset:-2px;border-radius:var(--radius-sm)}
.faq-icon{position:relative;width:18px;height:18px;flex-shrink:0;color:var(--color-link)}
.faq-icon-h,.faq-icon-v{position:absolute;background:currentColor;border-radius:2px;transition:transform .3s ease,opacity .3s ease}
.faq-icon-h{top:50%;left:0;width:100%;height:2px;transform:translateY(-50%)}
.faq-icon-v{left:50%;top:0;height:100%;width:2px;transform:translateX(-50%)}
.faq-item.open .faq-icon-v{transform:translateX(-50%) scaleY(0);opacity:0}
.faq-answer{overflow:hidden;max-height:0;transition:max-height .4s cubic-bezier(.22,1,.36,1)}
.faq-item.open .faq-answer{max-height:500px}
.faq-answer-inner{padding:0 var(--space-lg) var(--space-lg);padding-left:calc(var(--space-lg) + 24px + var(--space-sm));font-size:.875rem;line-height:1.65;color:var(--color-body)}