:root{--bg: #0a0a0a;--surface: #1a1a1a;--surface-hover: #252525;--text: #f5f5f5;--text-muted: #a0a0a0;--border: #333;--accent: #3b82f6;--highlight-bg: #1e293b;--highlight-border: #3b82f6}@media (prefers-color-scheme: light){:root{--bg: #f5f5f5;--surface: #ffffff;--surface-hover: #f0f0f0;--text: #1a1a1a;--text-muted: #666;--border: #e0e0e0;--accent: #2563eb;--highlight-bg: #eff6ff;--highlight-border: #3b82f6}}*{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;-webkit-text-size-adjust:100%}body{font-family:-apple-system,BlinkMacSystemFont,SF Pro Text,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.5;min-height:100vh;min-height:-webkit-fill-available}.app{max-width:600px;margin:0 auto;padding:0 16px 100px;padding-bottom:env(safe-area-inset-bottom,16px)}.header{padding:20px 0 16px;text-align:center;position:sticky;top:0;background:var(--bg);z-index:100}.header h1{font-size:1.75rem;font-weight:700;letter-spacing:-.02em}.subtitle{color:var(--text-muted);font-size:.875rem;margin-top:2px}.day-toggle{display:flex;gap:8px;margin-bottom:16px;background:var(--surface);padding:4px;border-radius:12px}.day-btn{flex:1;padding:12px 16px;border:none;background:transparent;color:var(--text-muted);font-size:1rem;font-weight:600;border-radius:10px;cursor:pointer;transition:all .15s ease;-webkit-tap-highlight-color:transparent}.day-btn.active{background:var(--accent);color:#fff}.filters-section{margin-bottom:16px}.filter-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}.filter-label{font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--text-muted)}.clear-btn{background:none;border:none;color:var(--accent);font-size:.875rem;padding:4px 8px;cursor:pointer;-webkit-tap-highlight-color:transparent}.filter-chips{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px}.chip{display:flex;align-items:center;gap:6px;padding:10px 14px;border:1px solid var(--border);border-radius:20px;background:var(--surface);color:var(--text);font-size:.875rem;cursor:pointer;transition:all .15s ease;-webkit-tap-highlight-color:transparent;min-height:44px}.chip:active{transform:scale(.97)}.chip.active{background:var(--chip-color, var(--accent));border-color:var(--chip-color, var(--accent));color:#fff}.chip-icon{font-size:1rem}.chip-label{white-space:nowrap}.building-chip{--chip-color: #64748b}.highlight-chip{--chip-color: #eab308}.highlight-chip.active{color:#1a1a1a}.results-count{font-size:.875rem;color:var(--text-muted);margin-bottom:12px;padding-left:4px}.schedule{display:flex;flex-direction:column;gap:24px}.time-block{display:flex;flex-direction:column;gap:8px}.time-header{font-size:1.25rem;font-weight:700;color:var(--text);padding:8px 0;position:sticky;top:72px;background:var(--bg);z-index:50}.talks{display:flex;flex-direction:column;gap:8px}.talk-card{display:block;background:var(--surface);border-radius:12px;padding:14px;border:1px solid var(--border);transition:background .15s ease;text-decoration:none;color:inherit;-webkit-tap-highlight-color:transparent}.talk-card:active{background:var(--surface-hover)}.talk-card.highlight{background:var(--highlight-bg);border-color:var(--highlight-border)}.talk-card:visited{color:inherit}.talk-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}.talk-time{font-size:.8rem;font-weight:600;color:var(--accent);font-variant-numeric:tabular-nums}.talk-room{font-size:.75rem;color:var(--text-muted);background:var(--bg);padding:4px 8px;border-radius:6px;font-family:SF Mono,Menlo,monospace}.talk-title{font-size:1rem;font-weight:600;line-height:1.4;margin-bottom:4px}.star{margin-right:4px}.talk-speaker{font-size:.875rem;color:var(--text-muted);margin-bottom:8px}.talk-context{font-size:.875rem;color:var(--text-muted);line-height:1.5}.talk-footer{display:flex;justify-content:space-between;align-items:center;margin-top:10px;padding-top:10px;border-top:1px solid var(--border)}.talk-categories{font-size:1rem;letter-spacing:2px}.talk-building{font-size:.75rem;color:var(--text-muted);background:var(--bg);padding:4px 8px;border-radius:6px}.no-results{text-align:center;padding:40px 20px;color:var(--text-muted)}.clear-link{display:block;margin-top:12px;color:var(--accent);background:none;border:none;font-size:1rem;cursor:pointer}.room-distances{margin-top:32px;background:var(--surface);border-radius:12px;padding:14px;border:1px solid var(--border)}.room-distances summary{font-weight:600;cursor:pointer;-webkit-tap-highlight-color:transparent}.distance-grid{margin-top:12px;display:grid;grid-template-columns:1fr 1fr;gap:8px;font-size:.875rem;color:var(--text-muted)}@supports (padding: env(safe-area-inset-bottom)){.app{padding-left:max(16px,env(safe-area-inset-left));padding-right:max(16px,env(safe-area-inset-right))}}html,body{overscroll-behavior:none}html{scroll-behavior:smooth}.chip:focus-visible,.day-btn:focus-visible,.clear-btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}