:root{--text:#6b6375;--text-h:#08060d;--bg:#fff;--border:#e5e4e7;--code-bg:#f4f3ec;--card-bg:#fafafa;--nav-bg:#ffffffb8;--accent:#aa3bff;--accent-bg:#aa3bff1a;--accent-border:#aa3bff80;--social-bg:#f4f3ec80;--shadow:#0000001a 0 10px 15px -3px, #0000000d 0 4px 6px -2px;--glass-bg:#ffffff8c;--glass-bg-strong:#ffffffbf;--glass-border:#fff9;--glass-shadow:#00000014 0 8px 32px -8px, #fff6 0 1px 0 0 inset;--brand-blue:#0a84ff;--brand-purple:#bf5af2;--brand-pink:#ff375f;--brand-orange:#ff9f0a;--brand-teal:#64d2ff;--gradient-brand:linear-gradient(135deg, var(--brand-blue), var(--brand-purple) 50%, var(--brand-pink));--sans:-apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", system-ui, Roboto, sans-serif;--heading:-apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", system-ui, Roboto, sans-serif;--mono:ui-monospace, Consolas, monospace;font:17px/145% var(--sans);letter-spacing:.18px;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark;color:var(--text);background:var(--bg);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;scroll-behavior:smooth}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial}}@media (width<=1024px){:root{font-size:16px}}@media (prefers-color-scheme:dark){:root{--text:#9ca3af;--text-h:#f3f4f6;--bg:#16171d;--border:#2e303a;--code-bg:#1f2028;--card-bg:#1b1c23;--nav-bg:#16171db8;--accent:#c084fc;--accent-bg:#c084fc26;--accent-border:#c084fc80;--social-bg:#2f303a80;--shadow:#0006 0 10px 15px -3px, #00000040 0 4px 6px -2px;--glass-bg:#1b1c2380;--glass-bg-strong:#1b1c23b3;--glass-border:#ffffff1f;--glass-shadow:#00000059 0 8px 32px -8px, #ffffff0f 0 1px 0 0 inset}}.glass{background:var(--glass-bg);-webkit-backdrop-filter:blur(24px)saturate(180%);border:1px solid var(--glass-border);box-shadow:var(--glass-shadow)}*{box-sizing:border-box}body{margin:0}#root{flex-direction:column;min-height:100svh;display:flex}main{flex:1}h1,h2,h3{font-family:var(--heading);color:var(--text-h);margin:0;font-weight:600}p{margin:0}a{color:inherit}code{font-family:var(--mono);color:var(--text-h);background:var(--code-bg);border-radius:4px;padding:4px 8px;font-size:15px;line-height:135%}.nav{z-index:100;-webkit-backdrop-filter:saturate(200%)blur(24px);background:var(--glass-bg);border-bottom:1px solid var(--glass-border);position:sticky;top:0}.nav__inner{justify-content:space-between;align-items:center;gap:16px;max-width:1120px;height:52px;margin:0 auto;padding:0 24px;display:flex}.nav__logo{letter-spacing:-.2px;background:var(--gradient-brand);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;font-size:15px;font-weight:700;text-decoration:none}.nav__links{gap:28px;display:flex}@media (width<=700px){.nav__links{display:none}}.nav__links a{color:var(--text);font-size:13px;text-decoration:none;transition:color .2s}.nav__links a:hover{color:var(--text-h)}.nav__cta{color:#fff;background:var(--gradient-brand);white-space:nowrap;border-radius:980px;padding:6px 14px;font-size:12px;font-weight:600;text-decoration:none;transition:transform .2s,opacity .2s}.nav__cta:hover{opacity:.8}.nav__cta:active{transform:scale(.96)}.hero{text-align:center;flex-direction:column;align-items:center;padding:96px 24px 88px;display:flex;position:relative;overflow:hidden}@media (width<=700px){.hero{padding:56px 20px}}.hero__glow{z-index:-1;filter:blur(90px);opacity:.55;background:radial-gradient(circle at 20% 25%, var(--brand-blue) 0%, transparent 40%), radial-gradient(circle at 80% 20%, var(--brand-purple) 0%, transparent 42%), radial-gradient(circle at 30% 80%, var(--brand-teal) 0%, transparent 40%), radial-gradient(circle at 85% 75%, var(--brand-pink) 0%, transparent 42%), radial-gradient(circle at 55% 50%, var(--brand-orange) 0%, transparent 35%);position:absolute;inset:-20%}@media (prefers-color-scheme:dark){.hero__glow{opacity:.35}}.hero__panel{border-radius:32px;flex-direction:column;align-items:center;max-width:720px;padding:56px 48px;display:flex}@media (width<=700px){.hero__panel{border-radius:24px;padding:40px 24px}}.hero__eyebrow{color:var(--text);background:var(--social-bg);border:1px solid var(--border);border-radius:980px;align-items:center;gap:8px;margin:0 0 24px;padding:6px 14px;font-size:13px;font-weight:500;display:inline-flex}.hero__dot{background:#34c759;border-radius:50%;width:7px;height:7px;box-shadow:0 0 0 3px #34c75933}.hero__title{letter-spacing:-2.5px;background:var(--gradient-brand);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;margin:0 0 16px;font-size:64px;line-height:1}@media (width<=700px){.hero__title{letter-spacing:-1.5px;font-size:42px}}.hero__tagline{color:var(--text-h);margin:0 0 20px;font-size:19px;font-weight:500}.hero__description{color:var(--text);margin:0 0 36px;font-size:17px;line-height:1.5}.hero__actions{flex-wrap:wrap;justify-content:center;gap:12px;display:flex}.deck-grid{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px;display:grid}.deck-card{cursor:pointer;font:inherit;color:inherit;text-align:center;border-radius:20px;flex-direction:column;align-items:center;gap:8px;padding:28px 20px;transition:transform .2s,border-color .2s,box-shadow .2s;display:flex}.deck-card:hover{border-color:color-mix(in srgb, var(--deck-color) 55%, transparent);box-shadow:0 16px 32px -12px color-mix(in srgb, var(--deck-color) 55%, transparent), var(--glass-shadow);transform:translateY(-3px)}.deck-card:active{transform:scale(.98)}.deck-card__icon{background:color-mix(in srgb, var(--deck-color) 20%, transparent);width:56px;height:56px;box-shadow:inset 0 0 0 1px color-mix(in srgb, var(--deck-color) 45%, transparent);border-radius:50%;justify-content:center;align-items:center;margin-bottom:4px;font-size:28px;display:flex}.deck-card__title{font-size:18px}.deck-card__description{color:var(--text);font-size:14px}.deck-card__progress{background:var(--border);border-radius:980px;width:100%;height:6px;margin-top:8px;overflow:hidden}.deck-card__progress-bar{background:var(--deck-color);border-radius:980px;height:100%;transition:width .3s}.deck-card__count{color:var(--text);font-size:12px}.flashcard-header{justify-content:space-between;align-items:center;gap:16px;margin-bottom:24px;display:flex}.flashcard-progress{color:var(--text);align-items:center;gap:10px;font-size:13px;display:flex}.flashcard-progress__bar{background:var(--border);border-radius:980px;width:120px;height:6px;overflow:hidden}.flashcard-progress__fill{background:var(--deck-color);border-radius:980px;height:100%;transition:width .3s}.flashcard{perspective:1200px;cursor:pointer;width:100%;max-width:420px;height:260px;margin:40px auto;position:relative}.flashcard__face{border:1px solid var(--glass-border);background:var(--glass-bg);-webkit-backdrop-filter:blur(24px)saturate(180%);box-shadow:inset 0 0 0 1px color-mix(in srgb, var(--deck-color) 25%, transparent), var(--glass-shadow);backface-visibility:hidden;border-radius:24px;flex-direction:column;justify-content:center;align-items:center;gap:12px;padding:24px;transition:transform .5s;display:flex;position:absolute;inset:0;transform:rotateY(0)}.flashcard__face--back{background:color-mix(in srgb, var(--deck-color) 18%, var(--glass-bg));border-color:color-mix(in srgb, var(--deck-color) 50%, transparent);transform:rotateY(180deg)}.flashcard--flipped .flashcard__face--front{transform:rotateY(180deg)}.flashcard--flipped .flashcard__face--back{transform:rotateY(360deg)}.flashcard__word{color:var(--text-h);text-align:center;font-size:32px;font-weight:600}.flashcard__hint{color:var(--text);font-size:13px}.flashcard__example{color:var(--text);text-align:center;font-size:14px;font-style:italic}.flashcard-actions{justify-content:center;gap:16px;display:flex}.flashcard-actions__no{color:var(--text-h);background:var(--glass-bg);-webkit-backdrop-filter:blur(20px)saturate(180%);border:1px solid var(--glass-border)}.flashcard-actions__no:hover{color:#e5484d;border-color:#e5484d}.flashcard-actions__yes{color:#fff;background:var(--deck-color);box-shadow:0 8px 20px -6px color-mix(in srgb, var(--deck-color) 60%, transparent)}.flashcard-actions__yes:hover{opacity:.9}.flashcard-complete{flex-direction:column;align-items:center;gap:20px;padding:60px 20px;display:flex}.flashcard-complete__title{color:var(--text-h);text-align:center;font-size:20px}.footer{border-top:1px solid var(--border);color:var(--text);flex-direction:column;align-items:center;gap:10px;padding:28px 24px 40px;font-size:13px;display:flex}.footer__links{gap:20px;display:flex}.footer__links a{color:var(--text);text-decoration:none}.footer__links a:hover{color:var(--text-h)}.section{text-align:center;max-width:1120px;margin:0 auto;padding:88px 24px}@media (width<=700px){.section{padding:56px 20px}}.section+.section{border-top:1px solid var(--border)}.section__header{margin-bottom:48px}.section__title{letter-spacing:-.8px;margin-bottom:8px;font-size:34px}@media (width<=700px){.section__title{font-size:26px}}.section__subtitle{color:var(--text);font-size:17px}.button{cursor:pointer;border:1px solid #0000;border-radius:980px;justify-content:center;align-items:center;padding:11px 24px;font-size:15px;font-weight:600;text-decoration:none;transition:transform .2s,opacity .2s,background .2s;display:inline-flex}.button:active{transform:scale(.96)}.button--primary{color:#fff;background:var(--gradient-brand);box-shadow:0 8px 20px -6px #bf5af28c}.button--primary:hover{opacity:.9;box-shadow:0 10px 24px -6px #bf5af2a6}.button--secondary{color:var(--text-h);background:var(--glass-bg);-webkit-backdrop-filter:blur(20px)saturate(180%);border-color:var(--glass-border)}.button--secondary:hover{border-color:var(--accent-border);color:var(--accent)}