*{margin:0;padding:0;box-sizing:border-box}:root{--bg-color: #f5f5f5;--card-bg: white;--text-primary: #1f2937;--text-secondary: #6b7280;--text-light: #9ca3af;--text-color: #1f2937;--border-color: #e5e7eb;--grid-color: #e5e7eb;--task-bg: #fafafa;--input-border: #e0e0e0}@media (prefers-color-scheme: dark){:root{--bg-color: #1a1a1a;--card-bg: #2a2a2a;--text-primary: #f9fafb;--text-secondary: #d1d5db;--text-light: #9ca3af;--text-color: #f9fafb;--border-color: #404040;--grid-color: #404040;--task-bg: #1f1f1f;--input-border: #4b5563}}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;background:var(--bg-color);min-height:100vh;height:100vh;overflow:hidden;display:flex;flex-direction:column}.splash-screen{position:fixed;top:0;right:0;bottom:0;left:0;background:#000;display:flex;align-items:center;justify-content:center;z-index:9999;opacity:1;transition:opacity .3s 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var(--border-color)}.settings-option:last-of-type{border-bottom:none}.settings-label{display:flex;justify-content:space-between;align-items:center;font-weight:600;color:var(--text-primary);margin-bottom:8px}.language-select{padding:8px 12px;border:1px solid var(--border-color);border-radius:6px;background:var(--task-bg);color:var(--text-primary);font-size:.95rem;cursor:pointer;transition:border-color .2s}.language-select:focus{outline:none;border-color:var(--text-secondary)}.toggle-switch{position:relative;width:50px;height:26px;-webkit-appearance:none;-moz-appearance:none;appearance:none;background:var(--border-color);border-radius:13px;cursor:pointer;transition:background .3s}.toggle-switch:checked{background:var(--text-primary)}.toggle-switch:before{content:"";position:absolute;width:22px;height:22px;border-radius:50%;background:#fff;top:2px;left:2px;transition:transform .3s}.toggle-switch:checked:before{transform:translate(24px)}.settings-action-btn{flex:1;padding:10px 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