/* ============ 设备预约管理系统 样式 ============ */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #dbeafe;
  --success: #16a34a;
  --warning: #f59e0b;
  --danger: #dc2626;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-500: #64748b;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 4px 16px rgba(0,0,0,.06);
  --sidebar-w: 230px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--gray-100);
  color: var(--gray-800);
  font-size: 14px;
}
.hidden { display: none !important; }
button { font-family: inherit; }

/* 标签页 */
.tabs { display: flex; gap: 8px; margin-bottom: 14px; }
.tab-btn {
  padding: 8px 18px; border: 1px solid var(--border); background: #fff;
  border-radius: 8px; cursor: pointer; font-size: 14px; color: var(--gray-600);
  transition: all .15s;
}
.tab-btn:hover { border-color: var(--primary); color: var(--primary); }
.tab-btn.active { background: var(--primary); border-color: var(--primary); color: #fff; }

/* 上传与预览 */
.upload-row { display: flex; align-items: center; margin-bottom: 6px; }
.image-preview {
  max-width: 160px; max-height: 110px; object-fit: cover;
  border-radius: 8px; border: 1px solid var(--gray-200); margin-top: 6px; display: block;
}
.muted { color: var(--gray-500); font-weight: normal; font-size: 12px; }

/* ============ 登录页 ============ */
.login-page {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 50%, #3b82f6 100%);
}
.login-card {
  background: #fff; border-radius: 16px; padding: 40px; width: 380px;
  box-shadow: 0 20px 60px rgba(0,0,0,.3);
}
.login-logo { text-align: center; margin-bottom: 28px; }
.logo-icon { font-size: 44px; }
.login-logo h1 { font-size: 20px; margin: 10px 0 4px; color: var(--gray-900); }
.login-logo p { color: var(--gray-500); font-size: 12px; letter-spacing: .5px; }
.login-hint { text-align: center; color: var(--gray-500); font-size: 12px; margin-top: 16px; }
.login-error { color: var(--danger); font-size: 13px; min-height: 18px; margin-bottom: 8px; }

/* ============ 布局 ============ */
.app { display: flex; min-height: 100vh; }
.sidebar {
  width: var(--sidebar-w); background: var(--gray-900); color: #fff;
  display: flex; flex-direction: column; position: fixed; top: 0; bottom: 0; left: 0; z-index: 50;
}
.sidebar-brand { display: flex; align-items: center; gap: 10px; padding: 20px 18px; border-bottom: 1px solid rgba(255,255,255,.08); }
.brand-icon { font-size: 26px; }
.brand-name { font-weight: 700; font-size: 12.5px; line-height: 1.35; word-break: break-all; }
.brand-sub { font-size: 11px; color: rgba(255,255,255,.5); }
.sidebar-nav { flex: 1; padding: 12px 8px; overflow-y: auto; }
.nav-item {
  display: flex; align-items: center; gap: 10px; padding: 11px 14px; margin: 2px 0;
  border-radius: 8px; color: rgba(255,255,255,.75); cursor: pointer; font-size: 14px;
  transition: all .15s; user-select: none; position: relative;
}
.nav-item:hover { background: rgba(255,255,255,.08); color: #fff; }
.nav-item.active { background: var(--primary); color: #fff; font-weight: 600; }
.nav-icon { width: 20px; text-align: center; }
.nav-badge {
  background: var(--danger); color: #fff; font-size: 11px; border-radius: 10px;
  padding: 1px 7px; margin-left: auto; font-weight: 700;
}
.sidebar-footer { padding: 14px; border-top: 1px solid rgba(255,255,255,.08); }
.user-chip { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.user-avatar {
  width: 34px; height: 34px; border-radius: 50%; background: var(--primary);
  display: flex; align-items: center; justify-content: center; font-size: 16px;
}
.user-name { font-size: 13px; font-weight: 600; }
.user-role { font-size: 11px; color: rgba(255,255,255,.5); }

.main { flex: 1; margin-left: var(--sidebar-w); padding: 24px 28px; }
.page { display: none; }
.page.active { display: block; }
.page-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; }
.page-header h2 { font-size: 20px; color: var(--gray-900); }
.page-actions { display: flex; gap: 10px; align-items: center; }

/* ============ 组件 ============ */
.card {
  background: #fff; border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 20px; margin-bottom: 18px;
}
.card-title { font-size: 15px; margin-bottom: 14px; color: var(--gray-900); }

.btn {
  border: none; border-radius: 8px; padding: 9px 16px; font-size: 14px; cursor: pointer;
  transition: all .15s; font-weight: 500;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-success { background: var(--success); color: #fff; }
.btn-warning { background: var(--warning); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-ghost { background: transparent; color: var(--gray-500); border: 1px solid var(--gray-300); }
.btn-ghost:hover { background: var(--gray-100); }
.btn-sm { padding: 5px 10px; font-size: 12.5px; border-radius: 6px; }
.btn-block { width: 100%; padding: 11px; font-size: 15px; }

.input, .select {
  width: 100%; padding: 8px 12px; border: 1px solid var(--gray-300); border-radius: 8px;
  font-size: 14px; background: #fff; color: var(--gray-800); outline: none;
  transition: border-color .15s;
}
.input:focus, .select:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-light); }

.form-group { margin-bottom: 14px; }
.form-group label { display: block; margin-bottom: 6px; font-size: 13px; color: var(--gray-700); font-weight: 500; }
.form-row { display: flex; gap: 14px; }
.form-row .form-group { flex: 1; }
.req { color: var(--danger); }
.form-error { color: var(--danger); font-size: 13px; min-height: 18px; margin: 6px 0; }
.checkbox-label { display: flex; align-items: center; gap: 8px; font-size: 13px; cursor: pointer; }
.checkbox-label input { width: 16px; height: 16px; }

/* 弹窗 */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(15,23,42,.5); z-index: 100;
  display: flex; align-items: center; justify-content: center; backdrop-filter: blur(2px);
}
.modal { background: #fff; border-radius: 14px; width: 560px; max-height: 90vh; overflow-y: auto; box-shadow: 0 24px 64px rgba(0,0,0,.25); }
.modal-lg { width: 720px; }
.modal-sm { width: 420px; }
.modal-header { display: flex; align-items: center; justify-content: space-between; padding: 18px 22px; border-bottom: 1px solid var(--gray-200); position: sticky; top: 0; background: #fff; z-index: 2; }
.modal-header h3 { font-size: 16px; }
.modal-close { background: none; border: none; font-size: 22px; color: var(--gray-500); cursor: pointer; line-height: 1; padding: 4px 8px; border-radius: 6px; }
.modal-close:hover { background: var(--gray-100); }
.modal form { padding: 20px 22px; }
.modal-footer { display: flex; justify-content: flex-end; gap: 10px; margin-top: 8px; }

.cost-preview {
  background: var(--gray-50); border: 1px dashed var(--gray-300); border-radius: 8px;
  padding: 10px 14px; font-size: 13px; color: var(--gray-700); margin-bottom: 8px;
}
.cost-preview b { color: var(--primary); }

/* ============ 表格 ============ */
.table { width: 100%; border-collapse: collapse; }
.table th {
  text-align: left; padding: 10px 12px; font-size: 12.5px; color: var(--gray-500);
  border-bottom: 2px solid var(--gray-200); white-space: nowrap; font-weight: 600;
}
.table td { padding: 11px 12px; border-bottom: 1px solid var(--gray-100); font-size: 13.5px; vertical-align: middle; }
.table tr:hover td { background: var(--gray-50); }
.table .empty-row td { text-align: center; color: var(--gray-500); padding: 30px; }

/* 状态徽章 */
.badge { display: inline-block; padding: 3px 10px; border-radius: 20px; font-size: 12px; font-weight: 600; }
.badge-pending, .badge-待审批, .badge-待处理, .badge-待校验, .badge-待验收 { background: #fef3c7; color: #92400e; }
.badge-approved, .badge-已通过 { background: #dbeafe; color: #1d4ed8; }
.badge-使用中, .badge-维修中 { background: #fff7ed; color: #c2410c; }
.badge-已完成 { background: #dcfce7; color: #166534; }
.badge-已拒绝, .badge-已取消, .badge-时间冲突, .badge-已停用 { background: #fee2e2; color: #b91c1c; }
.badge-暂停预约 { background: #f3e8ff; color: #7e22ce; }
.badge-可预约 { background: #dcfce7; color: #166534; }
.badge-免费 { background: #f1f5f9; color: #475569; }
.badge-正常 { background: #dcfce7; color: #166534; }
.badge-异常, .badge-需维修 { background: #fee2e2; color: #b91c1c; }

/* ============ 设备卡片 ============ */
.equipment-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.equip-card {
  background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden;
  transition: transform .15s, box-shadow .15s; display: flex; flex-direction: column;
}
.equip-card:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(0,0,0,.12); }
.equip-card-img {
  height: 140px; background: linear-gradient(135deg, #e0e7ff, #f0f9ff);
  display: flex; align-items: center; justify-content: center; font-size: 40px; color: var(--gray-300);
  background-size: cover; background-position: center; position: relative;
}
.equip-card-body { padding: 14px 16px; flex: 1; }
.equip-card-title { display: flex; align-items: center; justify-content: space-between; margin-bottom: 6px; }
.equip-card-title h3 { font-size: 15px; color: var(--gray-900); }
.equip-card-code { font-size: 12px; color: var(--gray-500); }
.equip-card-meta { font-size: 12.5px; color: var(--gray-500); margin-top: 4px; display: flex; gap: 8px; flex-wrap: wrap; }
.equip-card-footer { display: flex; gap: 8px; padding: 12px 16px; border-top: 1px solid var(--gray-100); }
.equip-card-footer .btn { flex: 1; }
.equip-desc { font-size: 12.5px; color: var(--gray-500); margin-top: 6px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* ============ 统计 ============ */
.stats-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 14px; margin-bottom: 18px; }
.stat-card { background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); padding: 18px; }
.stat-card .stat-label { font-size: 12.5px; color: var(--gray-500); margin-bottom: 6px; }
.stat-card .stat-value { font-size: 26px; font-weight: 700; color: var(--gray-900); }
.stat-card .stat-value small { font-size: 13px; color: var(--gray-500); font-weight: 400; }
.stat-card.accent-blue { border-left: 4px solid var(--primary); }
.stat-card.accent-green { border-left: 4px solid var(--success); }
.stat-card.accent-orange { border-left: 4px solid var(--warning); }
.stat-card.accent-red { border-left: 4px solid var(--danger); }
.stats-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.stats-grid .card { margin-bottom: 0; }
.stats-grid canvas { max-height: 260px; }

/* ============ 日历 ============ */
.legend-bar { display: flex; gap: 16px; margin-bottom: 12px; padding: 10px 14px; background: #fff; border-radius: 8px; box-shadow: var(--shadow); }
.legend { display: flex; align-items: center; gap: 6px; font-size: 12.5px; color: var(--gray-700); }
.dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.fc { --fc-border-color: var(--gray-200); --fc-today-bg-color: #eff6ff; --fc-page-bg-color: #fff; }
.fc .fc-toolbar-title { font-size: 18px !important; color: var(--gray-900); }
.fc .fc-button { background: var(--gray-100) !important; border-color: var(--gray-200) !important; color: var(--gray-700) !important; border-radius: 6px !important; font-size: 13px !important; padding: 5px 10px !important; }
.fc .fc-button-active { background: var(--primary) !important; color: #fff !important; }
.fc .fc-daygrid-day:hover { background: var(--gray-50); cursor: pointer; }
.fc-event { border-radius: 5px !important; font-size: 12px !important; padding: 2px 4px !important; cursor: pointer; }
.fc-event.fc-event-pending { background: #f59e0b !important; border-color: #f59e0b !important; }
.fc-event.fc-event-approved { background: #2563eb !important; border-color: #2563eb !important; }
.fc-event.fc-event-using { background: #ff9800 !important; border-color: #ff9800 !important; }
.fc-event.fc-event-done { background: #94a3b8 !important; border-color: #94a3b8 !important; }
.fc-event.fc-event-blocked { background: #ef4444 !important; border-color: #ef4444 !important; }

/* ============ Toast ============ */
.toast {
  position: fixed; top: 20px; right: 20px; z-index: 200; background: var(--gray-900); color: #fff;
  padding: 12px 20px; border-radius: 10px; font-size: 14px; box-shadow: 0 8px 24px rgba(0,0,0,.2);
  animation: slideIn .25s ease; max-width: 380px;
}
.toast.error { background: var(--danger); }
.toast.success { background: var(--success); }
@keyframes slideIn { from { transform: translateX(30px); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* 审批操作按钮组 */
.actions-group { display: flex; gap: 6px; }
.actions-group .btn { white-space: nowrap; }

@media (max-width: 900px) {
  .stats-grid { grid-template-columns: 1fr; }
  .sidebar { width: 64px; }
  .sidebar-brand div, .nav-item span:not(.nav-icon), .user-chip div, .sidebar-footer .btn { display: none; }
  .main { margin-left: 64px; }
}