:root{--timer-bg: #0e0e14;--timer-surface: #16161e;--timer-surface-container: #1e1e28;--timer-primary: #6c8eef;--timer-primary-subtle: rgba(108, 142, 239, .1);--timer-text-primary: #e8e8f0;--timer-text-secondary: #9ca3b0;--timer-text-tertiary: #5c6370;--timer-success: #4ade80;--timer-warning: #fbbf24;--timer-error: #ef4444;--timer-border: #2a2a3a}.demo-wrapper{display:flex;flex-direction:column;gap:24px;width:100%}.viewer-pane{position:sticky;top:0;z-index:100}@media(min-width:768px){.demo-wrapper{flex-direction:row;align-items:stretch;gap:32px}.controller-pane{flex:0 0 320px}.viewer-pane{flex:1;position:relative;top:auto}}.demo-pane{position:relative;z-index:1;display:flex;flex-direction:column;background:#0e0e14fa;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:2px solid var(--timer-border);border-radius:20px;overflow:hidden;box-shadow:0 10px 40px #0009}.viewer-pane{background-color:var(--timer-bg);container-type:inline-size;width:100%;min-height:300px}.viewer-content{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:space-between;padding:6cqi 4cqi;text-align:center;position:relative}.viewer-segment-name{color:var(--timer-text-secondary);font-size:clamp(14px,4cqi,28px);font-weight:700;width:100%;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;letter-spacing:1px}.viewer-timer{font-size:clamp(48px,25cqi,240px);font-weight:950;color:var(--timer-text-primary);font-variant-numeric:tabular-nums;line-height:1;transition:color .3s;letter-spacing:-4px;margin:auto 0}.viewer-timer.warning{color:var(--timer-warning)}.viewer-timer.error{color:var(--timer-error)}.viewer-status{color:var(--timer-error);font-size:clamp(12px,3cqi,18px);font-weight:900;letter-spacing:4px;text-transform:uppercase;transition:opacity .2s;opacity:.8}.viewer-status.hidden{visibility:hidden}.pane-header{padding:12px 16px;display:flex;flex-direction:column;gap:2px;text-align:left;background:#ffffff05;border-bottom:1px solid var(--timer-border)}.pane-title{color:var(--timer-text-primary);font-size:14px;font-weight:800;letter-spacing:-.2px}.pane-subtitle{color:var(--timer-text-tertiary);font-size:11px;font-weight:500}.control-box{padding:16px;background:var(--timer-surface-container);display:flex;flex-direction:column;align-items:center;gap:12px;border-bottom:1px solid var(--timer-border)}.segment-indicator{color:var(--timer-text-secondary);font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.5px}.main-controls{display:flex;align-items:center;gap:12px}.icon-btn{background:transparent;border:none;color:var(--timer-text-secondary);cursor:pointer;padding:8px;border-radius:50%;transition:all .2s;display:flex;align-items:center;justify-content:center}.icon-btn:hover:not(:disabled){background:#ffffff0d;color:var(--timer-text-primary)}.control-btn{width:48px;height:48px;border-radius:14px;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .2s ease;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}.control-btn.play{background:#00c85326;border:1px solid rgba(0,200,83,.3);color:#00c853}.control-btn.pause{background:#ffa00026;border:1px solid rgba(255,160,0,.3);color:#ffa000}.control-btn.reset{background:#ff525226;border:1px solid rgba(255,82,82,.3);color:#ff5252}.control-btn.disabled{opacity:.2;cursor:not-allowed;filter:grayscale(1);border:1px solid rgba(255,255,255,.05)}.control-btn:hover:not(.disabled){background:#ffffff0d;border-color:#fff3}.control-btn.play:hover:not(.disabled){background:#00c85340;border-color:#00c85380}.control-btn.pause:hover:not(.disabled){background:#ffa00040;border-color:#ffa00080}.control-btn.reset:hover:not(.disabled){background:#ff525240;border-color:#ff525280}.quick-adjust{display:flex;gap:8px;margin-top:4px}.quick-adjust button{background:#ffffff0d;border:1px solid var(--timer-border);color:var(--timer-text-secondary);padding:4px 10px;border-radius:8px;font-size:11px;font-weight:600;cursor:pointer;transition:all .2s}.quick-adjust button:hover{background:#ffffff1a;color:var(--timer-text-primary);border-color:var(--timer-text-tertiary)}.segments-list{flex:1;overflow-y:auto;padding:12px;display:flex;flex-direction:column;gap:8px}.segment-item{padding:14px 16px;border-radius:14px;background:var(--timer-surface);border:1.5px solid var(--timer-border);display:flex;align-items:center;justify-content:space-between;transition:all .2s}.segment-item.active{background:var(--timer-primary-subtle);border-color:var(--timer-primary)}.segment-info{display:flex;flex-direction:column;gap:2px;text-align:left;min-width:0}.segment-name{color:var(--timer-text-secondary);font-size:14px;font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.segment-item.active .segment-name{color:var(--timer-text-primary)}.segment-duration{color:var(--timer-text-tertiary);font-size:11px;font-weight:500}.segment-actions{display:flex;align-items:center;gap:4px}.active-badge{background:var(--timer-primary);color:#fff;font-size:9px;font-weight:900;padding:3px 6px;border-radius:4px;letter-spacing:.5px;margin-right:4px}.action-icon-btn{background:transparent;border:none;color:var(--timer-primary);cursor:pointer;padding:6px;border-radius:8px;transition:all .2s;display:flex;align-items:center;justify-content:center}.action-icon-btn:hover{background:var(--timer-primary-subtle)}