:root{--bg: #ffffff;--surface: #f8f8f8;--surface-2: #f0f0f0;--border: #e5e5e5;--border-hover: #d0d0d0;--text: #1a1a1a;--text-muted: #5c5c5c;--black: #0a0a0a;--font: "Syne", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--font-heading: var(--font);--ease: cubic-bezier(.25, .1, .25, 1);--transition: .15s var(--ease);--shadow-sm: 0 1px 3px rgba(0, 0, 0, .06);--shadow-md: 0 4px 12px rgba(0, 0, 0, .08);--shadow-lg: 0 12px 40px rgba(0, 0, 0, .1);--error: 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var(--transition),border-color var(--transition),color var(--transition)}.btn:focus-visible{outline:2px solid var(--text);outline-offset:2px}.btn-primary{height:44px;padding:0 24px;background:var(--black);color:var(--bg);box-shadow:var(--shadow-md)}.btn-primary:hover:not(:disabled){transform:translateY(-1px);box-shadow:var(--shadow-lg)}.btn-primary:active:not(:disabled){transform:translateY(.5px);box-shadow:var(--shadow-sm)}.btn-primary:disabled{opacity:.6;cursor:not-allowed}.btn-ghost{height:40px;padding:0 18px;background:transparent;color:var(--text-muted);border:1px solid var(--border)}.btn-ghost:hover{color:var(--text);border-color:var(--border-hover);background:var(--surface);transform:translateY(-1px)}.btn-ghost:active{transform:translateY(.5px);background:var(--surface-2)}.btn-ghost svg{opacity:.6}.demo{max-width:880px;margin:0 auto;padding:40px 24px 100px}.demo-player{position:relative;width:100%;background:var(--surface);border:1px solid var(--border);border-radius:12px;overflow:hidden;box-shadow:var(--shadow-md)}.demo-player video{width:100%;height:100%;object-fit:cover;display:block}.demo-image{width:100%;height:auto;display:block;vertical-align:top}.features{max-width:880px;margin:0 auto;padding:0 24px 120px}.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--border);border:1px solid var(--border);border-radius:12px;overflow:hidden;box-shadow:var(--shadow-md)}.feature-card{padding:36px 28px;background:var(--surface)}.feature-title{font-family:var(--font-heading);font-size:.85rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--text);margin-bottom:8px}.feature-desc{font-size:.9rem;color:var(--text-muted);line-height:1.6}.footer{background:#ffffffd9;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}.footer-inner{max-width:1080px;margin:0 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