/* Light theme variables */
:root { --bg:#f6f8fb; --card:#ffffff; --text:#0e1320; --muted:#5c6985; --accent:#2b6de9; --accent-2:#1aa07a; --border:#d7dcea; --head:#f0f3fa; }
* { box-sizing:border-box; }
html,body { margin:0; padding:0; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif; background:var(--bg); color:var(--text); }
.container { width: min(1100px, 92vw); margin: 0 auto; }
.flex { display:flex; align-items:center; justify-content:space-between; gap:1rem; }
.topbar { border-bottom:1px solid var(--border); background:rgba(255,255,255,0.8); position:sticky; top:0; backdrop-filter:saturate(140%) blur(8px); }
.brand { font-weight:700; letter-spacing:0.5px; padding: 0.8rem 0; color:#1c2439; }
.user { margin-right:0.75rem; color:var(--muted); }
.btn { display:inline-block; padding:0.5rem 0.9rem; border:1px solid var(--border); border-radius:8px; color:var(--text); text-decoration:none; transition: .15s; background:#fff; }
.btn:hover { border-color:var(--accent); }
.btn.primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); border-color:transparent; color:#ffffff; font-weight:600; }
.btn.primary:hover { filter: brightness(1.05); }
.flash { display:none; }
.muted { color: var(--muted); }
.footer { padding: 2rem 0; color:var(--muted); }
section { margin: 1.5rem 0 2.5rem; }
h2 { margin: 1.2rem 0; }
h3 { margin: 1rem 0; color: #1c2439; }
.table { width:100%; border-collapse: collapse; border:1px solid var(--border); border-radius:12px; overflow:hidden; background:#fff; }
.table th, .table td { padding:0.6rem 0.75rem; border-bottom:1px solid var(--border); }
.table thead { background:var(--head); }
.card { background: var(--card); border:1px solid var(--border); border-radius:12px; padding:1rem; margin-top:1rem; }
.form-grid { display:grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap:1rem; }
label { display:flex; flex-direction:column; font-size:0.95rem; gap:0.35rem; }
input { padding:0.6rem 0.7rem; background:#ffffff; color:var(--text); border:1px solid var(--border); border-radius:8px; }
.actions { grid-column: 1 / -1; display:flex; gap:0.6rem; justify-content:flex-end; }

select { padding:0.55rem 0.6rem; background:#ffffff; color:var(--text); border:1px solid var(--border); border-radius:8px; }

/* Calendar */
.calendar-header { margin-top: 1rem; }
.cal-grid { display:grid; grid-template-columns: repeat(7, 1fr); }
.cal-head { color:#33405f; font-weight:600; text-align:center; padding:0.25rem 0.4rem; }
.cal-head > div { padding:0.5rem; border-bottom:1px solid var(--border); background:var(--head); }
.cal-body { gap:1px; background:var(--border); }
.cal-body .cal-cell { background: var(--card); min-height: 120px; padding:0.5rem; display:flex; flex-direction:column; border:1px solid var(--border); }
.cal-cell.out-month { opacity: 0.5; }
.cal-dayline { display:flex; align-items:center; justify-content:space-between; }
.day-num { font-weight:700; color:#33405f; }
.mini-link { text-decoration:none; color: #fff; background: var(--accent-2); border:1px solid var(--accent-2); padding:0 6px; border-radius:6px; }
.cal-items { margin-top:0.35rem; display:flex; flex-direction:column; gap:0.35rem; }
.cal-item { background:#f7faff; border:1px solid var(--border); border-radius:8px; padding:0.4rem 0.5rem; }
.cal-item .time { font-weight:600; font-size:0.9rem; }
.cal-item .info { font-size:0.85rem; color:#526086; }
.cal-item .ops { margin-top:0.25rem; font-size:0.85rem; }
.link-btn { background:none; border:none; color:#c72b2b; cursor:pointer; padding:0; }

/* Week grid */
.week-grid { display:flex; flex-direction:column; gap:1px; background:var(--border); }
.wg-head, .wg-row { display:grid; grid-template-columns: 140px repeat(auto-fit, minmax(160px, 1fr)); gap:1px; }
.wg-corner, .wg-col-head, .wg-row-head, .wg-cell { background: var(--card); padding:0.5rem; border:1px solid var(--border); }
.wg-col-head { font-weight:600; text-align:center; color:#33405f; background:var(--head); }
.wg-row-head { font-weight:600; color:#33405f; background:var(--head); }
.wg-cell { min-height: 90px; }

/* Modals */
.modal-backdrop{ position:fixed; inset:0; background:rgba(0,0,0,0.35); opacity:0; pointer-events:none; transition:.2s; }
.modal-backdrop.open{ opacity:1; pointer-events:auto; }
.modal{ position:fixed; inset:0; display:flex; align-items:center; justify-content:center; opacity:0; pointer-events:none; transition:.2s; }
.modal.open{ opacity:1; pointer-events:auto; }
.modal-content{ background:#fff; border:1px solid var(--border); border-radius:12px; width:min(520px, 92vw); padding:1rem; box-shadow:0 10px 30px rgba(0,0,0,0.12); }
.modal-body{ white-space:pre-wrap; color:#0e1320; margin-bottom:0.75rem; }
.modal-actions{ display:flex; gap:0.5rem; justify-content:flex-end; }