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button:focus-visible,.landing-preview-library button:focus-visible{outline:2px solid var(--landing-accent);outline-offset:3px}@media(max-width:760px){.landing-preview-library{grid-template-columns:minmax(0,1fr);gap:20px}.landing-preview-cards{grid-template-columns:minmax(0,1fr)}.landing-demo-top{font-size:9px;padding:12px}.landing-demo-lesson>img{width:48px;height:32px}}:root{--landing-bg: var(--bg);--landing-panel: var(--panel);--landing-panel-inset: var(--panel-inset);--landing-accent: var(--accent);--landing-accent-hover: var(--accent-hover);--landing-text: var(--text);--landing-text-secondary: var(--text-secondary);--landing-text-muted: var(--text-muted);--landing-text-dim: var(--text-dim);--landing-text-faint: var(--text-faint);--landing-text-faintest: var(--text-faintest);--landing-border: var(--line);--landing-border-card: var(--line-card);--landing-border-strong: var(--line-strong)}.landing{background:var(--landing-bg);color:var(--landing-text);font-family:var(--sans);min-height:100vh;overflow-x:hidden;scroll-behavior:smooth}.landing *,.landing *:before,.landing *:after{box-sizing:border-box}.landing ::selection{background:var(--landing-accent);color:#fff}.landing-nav{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);background:color-mix(in srgb,var(--landing-bg) 78%,transparent);border-bottom:1px solid var(--landing-border)}.landing-nav-inner{max-width:1200px;margin:0 auto;padding:16px 32px;display:flex;align-items:center;justify-content:space-between}.landing-logo{display:flex;gap:11px;align-items:center;text-decoration:none}.landing-logo-mark{width:30px;height:30px;border-radius:8px;background:color-mix(in srgb,var(--landing-accent) 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104px;position:relative}.landing-hero-glow{position:absolute;top:-180px;left:50%;transform:translate(-50%);width:900px;height:600px;background:radial-gradient(ellipse at center,color-mix(in srgb,var(--landing-accent) 10%,transparent) 0%,transparent 70%);pointer-events:none;z-index:0}.landing-hero-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(420px,1fr));gap:56px;align-items:center;position:relative;z-index:1}.landing-eyebrow{font-family:var(--mono);font-size:12px;font-weight:500;letter-spacing:.2em;text-transform:uppercase;color:var(--landing-accent);margin-bottom:18px}.landing-h1{font-size:62px;font-weight:600;line-height:1.03;letter-spacing:-.035em;color:var(--landing-text);margin:0 0 24px}.landing-h2{font-size:44px;font-weight:600;line-height:1.08;letter-spacing:-.025em;color:var(--landing-text);margin:0 0 18px}.landing-h3{font-size:24px;font-weight:600;line-height:1.2;letter-spacing:-.015em;color:var(--landing-text);margin:0 0 10px}.landing-body{font-size:17px;font-weight:400;line-height:1.6;color:var(--landing-text-muted);margin:0 0 28px}.landing-body--lg{font-size:18px}.landing-trust{font-family:var(--mono);font-size:12px;font-weight:400;letter-spacing:.12em;text-transform:uppercase;color:var(--landing-text-faintest)}.landing-window{background:var(--landing-panel);border:1px solid var(--landing-border-card);border-radius:14px;overflow:hidden;box-shadow:0 2px 40px #00000059,0 0 0 1px #ffffff08 inset}.landing-window-titlebar{display:flex;align-items:center;gap:10px;padding:13px 16px;border-bottom:1px solid var(--landing-border);background:var(--landing-panel-inset)}.landing-window-dots{display:flex;gap:6px}.landing-window-dot{width:10px;height:10px;border-radius:50%;background:#ffffff14}.landing-window-dot--close{background:#ff5f57}.landing-window-dot--min{background:#febc2e}.landing-window-dot--max{background:#28c840}.landing-window-url{flex:1;text-align:center;font-size:12px;color:var(--landing-text-faint);font-family:var(--mono);letter-spacing:.02em}.landing-window-body{display:grid;grid-template-columns:1fr 260px}.landing-window-body--single{grid-template-columns:1fr}.landing-player{position:relative;background:#000;aspect-ratio:16 / 9;display:flex;align-items:center;justify-content:center;overflow:hidden}.landing-player-badge{position:absolute;top:12px;left:12px;display:inline-flex;align-items:center;gap:5px;background:#0009;backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);border-radius:6px;padding:5px 10px;font-size:11px;font-weight:500;color:var(--landing-text-secondary)}.landing-player-badge-dot{width:6px;height:6px;border-radius:50%;background:var(--landing-accent)}.landing-play-btn{width:56px;height:56px;border-radius:50%;background:#ffffff1f;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,.18);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:background .14s,transform .14s}.landing-play-btn:hover{background:#fff3;transform:scale(1.06)}.landing-play-btn-icon{width:0;height:0;border-style:solid;border-width:10px 0 10px 18px;border-color:transparent transparent transparent #fff;margin-left:3px}.landing-scrubber{position:absolute;bottom:0;left:0;right:0;height:4px;background:#ffffff1a}.landing-scrubber-fill{height:100%;width:35%;background:var(--landing-accent);border-radius:0 2px 2px 0}.landing-lesson-info{padding:16px 18px;border-bottom:1px solid var(--landing-border)}.landing-lesson-title{font-size:15px;font-weight:600;color:var(--landing-text);margin:0 0 4px}.landing-lesson-meta{font-size:12px;color:var(--landing-text-faint);display:flex;gap:12px;align-items:center}.landing-up-next{display:inline-flex;align-items:center;gap:6px;padding:5px 12px;background:#ffffff0a;border:1px solid var(--landing-border);border-radius:100px;font-size:12px;color:var(--landing-text-dim);margin-top:10px}.landing-up-next-label{color:var(--landing-text-faintest);font-weight:500}.landing-curriculum{border-left:1px solid var(--landing-border);background:var(--landing-panel-inset);overflow-y:auto;max-height:400px}.landing-curriculum-header{padding:14px 16px;font-size:13px;font-weight:600;color:var(--landing-text-secondary);border-bottom:1px solid var(--landing-border);letter-spacing:-.01em}.landing-module-header{padding:12px 16px 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var(--landing-text-faintest)}.landing-lesson-dur{margin-left:auto;font-size:11px;font-family:var(--mono);color:var(--landing-text-faintest)}.landing-cards-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.landing-card{background:var(--landing-panel);border:1px solid var(--landing-border-card);border-radius:16px;padding:32px 28px;transition:border-color .14s,box-shadow .14s}.landing-card:hover{border-color:#ffffff1f;box-shadow:0 4px 24px #0003}.landing-step-num{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:8px;background:color-mix(in srgb,var(--landing-accent) 12%,var(--landing-panel));color:var(--landing-accent);font-family:var(--mono);font-size:14px;font-weight:600;margin-bottom:20px}.landing-card-visual{width:100%;border-radius:10px;background:var(--landing-panel-inset);border:1px solid var(--landing-border);padding:20px;margin-bottom:22px;min-height:120px;display:flex;align-items:center;justify-content:center;overflow:hidden}.landing-mini-bar{height:6px;border-radius:3px;background:#ffffff0f}.landing-mini-bar--accent{background:color-mix(in srgb,var(--landing-accent) 40%,transparent)}.landing-mini-bar--filled{background:var(--landing-accent)}.landing-mini-circle{width:36px;height:36px;border-radius:50%;background:#ffffff0f}.landing-mini-circle--accent{background:color-mix(in srgb,var(--landing-accent) 20%,transparent)}.landing-mini-tag{display:inline-flex;padding:4px 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