:root{--bg: #f7f7f5;--surface: #ffffff;--surface-2: #f1f3f2;--border: #e3e6e4;--text: #1a1d1c;--text-2: #5b6561;--text-3: #8b9590;--accent: #0f766e;--accent-soft: #ccfbf1;--accent-text: #ffffff;--danger: #b91c1c;--warn: #b45309;--ok: #166534;--shadow: 0 1px 2px rgba(15, 23, 42, .04), 0 4px 12px rgba(15, 23, 42, .06);--radius: 10px;--radius-sm: 6px}@media (prefers-color-scheme: dark){:root{--bg: #0f1311;--surface: #181d1b;--surface-2: #222927;--border: #2c3330;--text: #e8ecea;--text-2: #a8b3ae;--text-3: #7c8782;--accent: #14b8a6;--accent-soft: #134e4a;--accent-text: #042f2e;--shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 4px 12px rgba(0, 0, 0, .35)}}*{box-sizing:border-box}html,body{margin:0;padding:0;height:100%;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang TC,Microsoft JhengHei,Noto Sans TC,Roboto,sans-serif;font-size:15px;line-height:1.5;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased}#app{height:100%;display:grid;grid-template-columns:280px 1fr}@media (max-width: 720px){#app{grid-template-columns:1fr;grid-template-rows:auto 1fr}}.sidebar{background:var(--surface);border-right:1px solid var(--border);display:flex;flex-direction:column;overflow:hidden}.sidebar-header{padding:18px 18px 12px;display:flex;align-items:center;justify-content:space-between;gap:8px}.brand{display:flex;align-items:center;gap:8px;font-weight:600;font-size:16px}.brand-dot{width:10px;height:10px;border-radius:50%;background:var(--accent)}.btn{border:1px solid var(--border);background:var(--surface);color:var(--text);padding:7px 12px;border-radius:var(--radius-sm);cursor:pointer;font-size:13px;font-weight:500;transition:background .12s,border-color .12s}.btn:hover{background:var(--surface-2)}.btn:active{transform:translateY(1px)}.btn-primary{background:var(--accent);border-color:var(--accent);color:var(--accent-text)}.btn-primary:hover{background:#0d9488;border-color:#0d9488}.btn-icon{width:30px;height:30px;padding:0;display:inline-flex;align-items:center;justify-content:center}.btn-ghost{border-color:transparent}.btn-danger{color:var(--danger)}.trip-list{flex:1;overflow-y:auto;padding:6px 10px 18px}.trip-item{padding:10px 12px;border-radius:var(--radius-sm);cursor:pointer;margin-bottom:4px;border:1px solid transparent}.trip-item:hover{background:var(--surface-2)}.trip-item.active{background:var(--accent-soft);border-color:var(--accent)}.trip-name{font-weight:600}.trip-meta{font-size:12px;color:var(--text-2);margin-top:2px}.trip-actions{display:flex;gap:4px;margin-top:6px;opacity:0;transition:opacity .12s}.trip-item.active .trip-actions,.trip-item:hover .trip-actions{opacity:1}.empty-state{padding:24px 18px;text-align:center;color:var(--text-3);font-size:13px}.sidebar-footer{padding:10px 18px;border-top:1px solid var(--border);font-size:11px;color:var(--text-3);display:flex;justify-content:space-between;gap:8px}.main{overflow-y:auto;padding:24px clamp(16px,4vw,40px) 60px}.main-empty{height:100%;display:flex;align-items:center;justify-content:center;flex-direction:column;color:var(--text-3);text-align:center;padding:40px}.trip-header{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:8px}.trip-title{font-size:26px;font-weight:700;margin:0}.trip-subtitle{color:var(--text-2);margin:4px 0 18px}.tabs{display:flex;gap:4px;border-bottom:1px solid var(--border);margin-bottom:20px;overflow-x:auto}.tab{padding:10px 14px;border:none;background:transparent;color:var(--text-2);cursor:pointer;font-size:14px;font-weight:500;border-bottom:2px solid transparent;margin-bottom:-1px;white-space:nowrap}.tab:hover{color:var(--text)}.tab.active{color:var(--accent);border-color:var(--accent)}.section{display:grid;gap:14px}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow)}.card h3{margin:0 0 14px;font-size:15px;font-weight:600;display:flex;justify-content:space-between;align-items:center;gap:8px}.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.row>*{flex:1;min-width:0}.row.tight>*{flex:0 0 auto}.input,.textarea,.select{width:100%;padding:9px 11px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface);color:var(--text);font-size:14px;font-family:inherit}.input:focus,.textarea:focus,.select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}.textarea{resize:vertical;min-height:90px}.list{display:grid;gap:8px}.list-item{display:flex;align-items:center;gap:10px;padding:10px 12px;background:var(--surface-2);border-radius:var(--radius-sm)}.list-item .grow{flex:1;min-width:0}.list-item .text{word-break:break-word}.list-item.done .text{text-decoration:line-through;color:var(--text-3)}.list-item .actions{display:flex;gap:4px;opacity:0;transition:opacity .12s}.list-item:hover .actions{opacity:1}.checkbox{width:18px;height:18px;cursor:pointer;accent-color:var(--accent)}.amount{font-variant-numeric:tabular-nums;font-weight:600}.amount.spent{color:var(--accent)}.day-block{border:1px solid var(--border);border-radius:var(--radius);padding:14px 16px;background:var(--surface)}.day-block+.day-block{margin-top:12px}.day-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}.day-title{font-weight:600;display:flex;align-items:center;gap:8px}.day-date{color:var(--text-2);font-size:13px}.itinerary-item{display:grid;grid-template-columns:90px 1fr auto;gap:10px;align-items:center;padding:8px 0;border-top:1px dashed var(--border)}.itinerary-item:first-child{border-top:0}.budget-summary{display:flex;gap:18px;flex-wrap:wrap;margin-bottom:14px;padding:12px 14px;background:var(--accent-soft);border-radius:var(--radius-sm)}.budget-cell{display:grid;gap:2px}.budget-cell .label{font-size:11px;color:var(--text-2);text-transform:uppercase;letter-spacing:.04em}.budget-cell .value{font-size:18px;font-weight:700;font-variant-numeric:tabular-nums}.tag{display:inline-block;padding:2px 8px;border-radius:99px;font-size:11px;background:var(--surface-2);color:var(--text-2)}dialog{border:none;border-radius:var(--radius);padding:0;background:var(--surface);color:var(--text);max-width:480px;width:calc(100% - 32px);box-shadow:var(--shadow)}dialog::backdrop{background:#0006;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}.dialog-form{padding:22px;display:grid;gap:14px}.dialog-form h2{margin:0;font-size:18px}.field{display:grid;gap:6px}.field label{font-size:12px;color:var(--text-2);font-weight:500}.dialog-actions{display:flex;justify-content:flex-end;gap:8px}.toast{position:fixed;bottom:20px;left:50%;transform:translate(-50%);background:var(--text);color:var(--bg);padding:10px 16px;border-radius:var(--radius);font-size:13px;box-shadow:var(--shadow);animation:toast-in .2s ease-out;z-index:100}@keyframes toast-in{0%{transform:translate(-50%,20px);opacity:0}to{transform:translate(-50%);opacity:1}}.muted{color:var(--text-3)}.danger{color:var(--danger)}