:root{--bg-dark: #0a0a0f;--bg-card: #12121a;--bg-elevated: #1a1a24;--bg-hover: #22222e;--accent-primary: #6366f1;--accent-secondary: #818cf8;--accent-success: #22c55e;--accent-coral: #f97316;--accent-teal: #14b8a6;--accent-rose: #f43f5e;--text-primary: #fafafa;--text-secondary: #a1a1aa;--text-tertiary: #71717a;--border-default: #27272a;--border-subtle: #1f1f23;--font-sans: "Manrope", -apple-system, BlinkMacSystemFont, sans-serif;--font-mono: "JetBrains Mono", "Fira Code", monospace;--section-padding: clamp(4rem, 10vw, 8rem);--transition-fast: .15s ease;--transition-normal: .25s ease;--language-switcher-bg: var(--bg-card);--language-switcher-border: var(--border-default);--language-switcher-hover: 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iframe,.video-container #youtube-player{position:absolute;top:0;left:0;width:100%;height:100%;border-radius:16px}.video-placeholder{position:relative;aspect-ratio:16 / 9;background:var(--bg-card);border:1px solid var(--border-default);border-radius:16px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1rem;overflow:hidden}.video-placeholder:before{content:"";position:absolute;inset:0;background:linear-gradient(135deg,rgba(99,102,241,.05) 0%,transparent 50%),linear-gradient(225deg,rgba(249,115,22,.05) 0%,transparent 50%)}.play-button{width:72px;height:72px;background:var(--accent-primary);border-radius:50%;display:flex;align-items:center;justify-content:center;transition:all var(--transition-fast);cursor:pointer}.play-button svg{width:28px;height:28px;color:#fff;margin-left:4px}.play-button:hover{transform:scale(1.1);background:var(--accent-secondary)}.video-label{font-size:.875rem;color:var(--text-tertiary);font-weight:500}.video-glow{position:absolute;bottom:-50%;left:50%;transform:translate(-50%);width:80%;height:100%;background:radial-gradient(ellipse at center,rgba(99,102,241,.2) 0%,transparent 60%);pointer-events:none;filter:blur(40px);transition:opacity .4s ease,width .4s ease}@media(min-width:769px){.video-demo{transition:max-width .4s ease}.video-demo .video-container{transform-origin:bottom center;transition:box-shadow .4s ease,transform .4s ease}.video-demo.video-expanded{max-width:1000px}.video-demo.video-expanded .video-container{transform:scale(1.12);box-shadow:0 25px 80px #6366f140,0 10px 30px #0006}.video-demo.video-expanded .video-glow{opacity:1.5;width:100%}}.hero-cta{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap}.features{padding:var(--section-padding) 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svg{width:24px;height:24px}.icon-ai{background:linear-gradient(135deg,var(--accent-primary),var(--accent-secondary));color:#fff}.icon-transcript{background:#14b8a626;color:var(--accent-teal)}.icon-summary{background:#f9731626;color:var(--accent-coral)}.icon-index{background:#f43f5e26;color:var(--accent-rose)}.icon-video{background:#22c55e26;color:var(--accent-success)}.icon-progress{background:#6366f126;color:var(--accent-primary)}.icon-focus{background:#818cf826;color:var(--accent-secondary)}.icon-speed{background:#14b8a626;color:var(--accent-teal)}.feature-title{font-size:1.125rem;font-weight:700;margin-bottom:.5rem;letter-spacing:-.01em}.feature-description{font-size:.9rem;color:var(--text-secondary);line-height:1.6}.feature-tags{display:flex;gap:.5rem;margin-top:1.25rem}.tag{padding:.25rem .625rem;background:var(--bg-elevated);border-radius:6px;font-size:.75rem;color:var(--text-tertiary);font-weight:500}.cta-section{padding:var(--section-padding) 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svg{width:18px;height:18px}.footer-brand .logo-text{font-size:1.125rem}.footer-tagline{font-size:.875rem;color:var(--text-tertiary)}.footer-copyright p{font-size:.813rem;color:var(--text-tertiary)}@media(max-width:768px){.header{padding:1rem}.nav{gap:1rem}.nav-link{display:none}.hero{padding:calc(var(--section-padding) + 60px) 1.5rem var(--section-padding)}.hero-subtitle{font-size:1.1rem}.hero-cta{flex-direction:column;align-items:stretch}.feature-highlight{grid-column:span 1}.features,.cta-section{padding:var(--section-padding) 1.5rem}.cta-content{padding:2rem 1.5rem}.footer-container{flex-direction:column;text-align:center}}.language-switcher{position:relative;margin-right:1rem}.language-btn{display:flex;align-items:center;gap:.5rem;padding:.5rem .75rem;background:var(--language-switcher-bg);border:1px solid var(--language-switcher-border);border-radius:.5rem;color:var(--text-primary);cursor:pointer;transition:all 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var(--border-default);border-radius:20px;width:100%;max-width:480px;max-height:90vh;overflow-y:auto;position:relative;transform:translateY(20px) scale(.95);transition:transform var(--transition-normal);padding:2rem}.modal-overlay.active .modal{transform:translateY(0) scale(1)}.modal-close{position:absolute;top:1rem;right:1rem;width:36px;height:36px;border:none;background:var(--bg-elevated);border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all var(--transition-fast);color:var(--text-secondary)}.modal-close:hover{background:var(--bg-hover);color:var(--text-primary)}.modal-close svg{width:18px;height:18px}.modal-header{text-align:center;margin-bottom:2rem}.modal-title{font-size:1.5rem;font-weight:700;margin-bottom:.5rem}.modal-subtitle{color:var(--text-secondary);font-size:.95rem}.waitlist-form{display:flex;flex-direction:column;gap:1.25rem}.form-group{display:flex;flex-direction:column;gap:.5rem}.form-group 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svg{width:32px;height:32px;color:var(--accent-success)}.success-title{font-size:1.5rem;font-weight:700;margin-bottom:.5rem}.success-message{color:var(--text-secondary);margin-bottom:1.5rem}.referral-invite{font-size:1rem;font-weight:500;color:var(--text-primary);margin-bottom:1rem}.referral-loading{display:flex;align-items:center;justify-content:center;gap:.75rem;padding:1rem;color:var(--text-secondary);font-size:.875rem}.referral-loading .spinner{width:18px;height:18px}.referral-section{background:var(--bg-elevated);border-radius:12px;padding:1.25rem;margin-bottom:1.5rem}.referral-label{font-size:.875rem;color:var(--text-secondary);margin-bottom:.75rem}.referral-input-group{display:flex;gap:.5rem}.referral-input{flex:1;padding:.625rem .875rem;background:var(--bg-card);border:1px solid var(--border-default);border-radius:8px;font-family:var(--font-mono);font-size:.813rem;color:var(--text-primary)}.btn-copy{display:flex;align-items:center;gap:.375rem;padding:.625rem .875rem}.btn-copy svg{width:16px;height:16px}.btn-copy.copied{background:#22c55e26;border-color:var(--accent-success);color:var(--accent-success)}.hidden{display:none!important}@media(max-width:480px){.modal{padding:1.5rem;border-radius:16px}.modal-title{font-size:1.25rem}.referral-input-group{flex-direction:column}.btn-copy{width:100%;justify-content:center}}