:root{--bg: #ffffff;--surface: #ffffff;--sidebar-bg: #f9fafb;--border: #d1d5db;--text: #111827;--text-muted: #6b7280;--text-soft: #374151;--grid: #e5e7eb;--tick: #666666;--title: #555555;--legend: #444444;--error: #dc2626;--toggle-bg: #f3f4f6;--toggle-border: #d1d5db;--nav-hover: #f3f4f6;--nav-active: #e5e7eb}:root[data-theme=dark]{--bg: #0f172a;--surface: #1e293b;--sidebar-bg: #0b1220;--border: #334155;--text: #f1f5f9;--text-muted: #94a3b8;--text-soft: #cbd5e1;--grid: #334155;--tick: #94a3b8;--title: #e2e8f0;--legend: #cbd5e1;--error: #f87171;--toggle-bg: #1e293b;--toggle-border: #334155;--nav-hover: #1e293b;--nav-active: #334155}body{font-family:Noto Sans TC,-apple-system,sans-serif;background:var(--bg);color:var(--text);margin:0;padding:0;transition:background .2s ease,color .2s ease;scrollbar-gutter:stable}.app{display:flex;min-height:100vh}.sidebar{width:220px;flex-shrink:0;background:var(--sidebar-bg);border-right:1px solid var(--border);padding:20px 12px;display:flex;flex-direction:column;gap:20px;transition:background .2s ease,border-color .2s ease}.sidebar-head{display:flex;align-items:center;justify-content:space-between;gap:8px}.brand{font-size:18px;font-weight:700;color:var(--text);padding:4px 8px}.sidebar-toggle,.sidebar-open{width:32px;height:32px;border-radius:6px;border:1px solid var(--border);background:var(--toggle-bg);color:var(--text-soft);cursor:pointer;font-size:16px;line-height:1;display:flex;align-items:center;justify-content:center;transition:background .15s ease,color .15s ease,border-color .15s ease}.sidebar-toggle:hover,.sidebar-open:hover{color:var(--text);border-color:var(--text-muted)}.sidebar-open{position:fixed;top:16px;left:16px;z-index:10}.nav{display:flex;flex-direction:column;gap:4px}.nav-item{display:flex;align-items:center;gap:10px;padding:10px 12px;background:transparent;border:none;border-radius:8px;cursor:pointer;font-size:15px;color:var(--text-soft);text-align:left;font-family:inherit;transition:background .15s ease,color .15s ease}.nav-item:hover{background:var(--nav-hover);color:var(--text)}.nav-item.active{background:var(--nav-active);color:var(--text);font-weight:600}.nav-icon{font-size:16px}.nav-label{flex:1}.content{flex:1;padding:24px;position:relative;min-width:0}.sidebar-foot{margin-top:auto;padding-top:12px;border-top:1px solid var(--border)}.clock{padding:8px 12px 12px;color:var(--text-soft);font-variant-numeric:tabular-nums;text-align:center}.clock-date{font-size:12px;color:var(--text-muted);margin-bottom:2px}.clock-time{font-size:32px;font-weight:600;color:var(--text);letter-spacing:.5px;transform:translate(-5px)}.sidebar-backdrop{display:none}@media(max-width:640px){.sidebar{position:fixed;top:0;left:0;height:100vh;z-index:50;box-shadow:4px 0 24px #00000059}.sidebar-backdrop{display:block;position:fixed;top:0;right:0;bottom:0;left:0;background:#0006;z-index:40}.content{padding:12px}}.fade-enter-active,.fade-leave-active{transition:opacity .15s ease}.fade-enter-from,.fade-leave-to{opacity:0}.auth-loading{min-height:100vh;display:flex;align-items:center;justify-content:center;background:var(--bg)}.auth-spinner{width:32px;height:32px;border:3px solid var(--border);border-top-color:var(--text-muted);border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}