/* ── Global Reset & Variables ─────────────────────────────────────── */
:root {
  --primary: #2563eb;
  --primary-light: #3b82f6;
  --primary-dark: #1d4ed8;
  --success: #059669;
  --success-bg: #ecfdf5;
  --danger: #dc2626;
  --danger-bg: #fef2f2;
  --warning: #d97706;
  --warning-bg: #fffbeb;
  --info: #0891b2;
  --info-bg: #ecfeff;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow: 0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,.1), 0 2px 4px -1px rgba(0,0,0,.06);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,.1), 0 4px 6px -2px rgba(0,0,0,.05);
  --transition: all .2s ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 15px; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background: var(--gray-50);
  color: var(--gray-800);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }

/* ── Layout ──────────────────────────────────────────────────────── */
.app-header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  padding: 0;
  box-shadow: var(--shadow-md);
  position: sticky;
  top: 0;
  z-index: 100;
}
.app-header .header-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}
.app-header .logo {
  font-size: 1.2rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
  color: #fff;
  flex-shrink: 0;
}
.app-header .logo svg { width: 28px; height: 28px; }

/* ── Navigation ──────────────────────────────────────────────────── */
.app-nav { display: flex; gap: 4px; }
.app-nav a {
  color: rgba(255,255,255,.85);
  padding: 8px 16px;
  border-radius: var(--radius);
  font-size: .9rem;
  font-weight: 500;
  transition: var(--transition);
  white-space: nowrap;
}
.app-nav a:hover, .app-nav a.active {
  background: rgba(255,255,255,.15);
  color: #fff;
}
.app-nav a.active { background: rgba(255,255,255,.2); }

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: #fff;
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius);
  transition: var(--transition);
}
.menu-toggle:hover { background: rgba(255,255,255,.15); }
.menu-toggle svg { width: 24px; height: 24px; display: block; }

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 24px;
}

/* ── Cards ───────────────────────────────────────────────────────── */
.card {
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: var(--transition);
}
.card:hover { box-shadow: var(--shadow-md); }
.card-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--gray-200);
  font-weight: 600;
  font-size: 1rem;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.card-body { padding: 20px; }
.card-footer {
  padding: 12px 20px;
  border-top: 1px solid var(--gray-200);
  background: var(--gray-50);
}

/* ── Stat Cards (Dashboard) ──────────────────────────────────────── */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}
.stat-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  gap: 16px;
  transition: var(--transition);
}
.stat-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.stat-icon svg { width: 24px; height: 24px; }
.stat-icon.blue { background: #dbeafe; color: var(--primary); }
.stat-icon.green { background: #d1fae5; color: var(--success); }
.stat-icon.red { background: #fee2e2; color: var(--danger); }
.stat-icon.orange { background: #fed7aa; color: var(--warning); }
.stat-icon.cyan { background: #cffafe; color: var(--info); }
.stat-value { font-size: 1.8rem; font-weight: 700; color: var(--gray-900); line-height: 1.2; }
.stat-label { font-size: .85rem; color: var(--gray-500); }

/* ── Tables ──────────────────────────────────────────────────────── */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: .9rem;
}
thead th {
  background: var(--gray-50);
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
  color: var(--gray-600);
  border-bottom: 2px solid var(--gray-200);
  white-space: nowrap;
}
tbody td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--gray-100);
  vertical-align: middle;
}
tbody tr:hover { background: var(--gray-50); }

/* ── Status Badges ───────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: .8rem;
  font-weight: 600;
  gap: 4px;
}
.badge-normal { background: var(--success-bg); color: var(--success); }
.badge-high { background: var(--danger-bg); color: var(--danger); }
.badge-low { background: var(--warning-bg); color: var(--warning); }
.badge-abnormal { background: #fae8ff; color: #a21caf; }

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  display: inline-block;
}
.status-dot.high { background: var(--danger); }
.status-dot.low { background: var(--warning); }
.status-dot.normal { background: var(--success); }

/* ── Buttons ─────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius);
  font-size: .9rem;
  font-weight: 500;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  min-height: 44px;
  min-width: 44px;
}
.btn svg { width: 16px; height: 16px; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #047857; color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #b91c1c; color: #fff; }
.btn-outline {
  background: transparent;
  color: var(--gray-700);
  border: 1px solid var(--gray-300);
}
.btn-outline:hover { background: var(--gray-100); }
.btn-sm { padding: 6px 12px; font-size: .8rem; min-height: 36px; min-width: 36px; }
.btn-lg { padding: 12px 24px; font-size: 1rem; }

/* ── Forms ───────────────────────────────────────────────────────── */
.form-group { margin-bottom: 16px; }
.form-label {
  display: block;
  font-size: .85rem;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 6px;
}
.form-control {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-size: 1rem;
  transition: var(--transition);
  background: #fff;
  color: var(--gray-800);
  min-height: 44px;
}
.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,.1);
}
select.form-control { cursor: pointer; }

/* ── Upload Zone ─────────────────────────────────────────────────── */
.upload-zone {
  border: 2px dashed var(--gray-300);
  border-radius: var(--radius-lg);
  padding: 48px 24px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  background: #fff;
}
.upload-zone:hover, .upload-zone.dragover {
  border-color: var(--primary);
  background: #eff6ff;
}
.upload-zone svg { width: 48px; height: 48px; color: var(--gray-400); margin-bottom: 12px; }
.upload-zone p { color: var(--gray-500); margin-top: 8px; }
.upload-zone .upload-title { font-size: 1.1rem; font-weight: 600; color: var(--gray-700); }
.file-input { display: none; }

/* ── File Preview ────────────────────────────────────────────────── */
.file-preview {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 12px;
  margin-top: 16px;
}
.file-thumb {
  position: relative;
  aspect-ratio: 1;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--gray-100);
  display: flex;
  align-items: center;
  justify-content: center;
}
.file-thumb img { width: 100%; height: 100%; object-fit: cover; }
.file-thumb .remove-btn {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(0,0,0,.6);
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
}
.file-name {
  font-size: .75rem;
  color: var(--gray-500);
  text-align: center;
  margin-top: 4px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ── Image Viewer ────────────────────────────────────────────────── */
.image-viewer {
  background: #000;
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
}
.image-viewer img {
  width: 100%;
  max-height: 70vh;
  object-fit: contain;
}

/* ── Chart Container ─────────────────────────────────────────────── */
.chart-container {
  position: relative;
  height: 350px;
  width: 100%;
}

/* ── Abnormal Highlight ──────────────────────────────────────────── */
.row-abnormal { background: #fff5f5 !important; }
.row-abnormal:hover { background: #fee2e2 !important; }
.val-high { color: var(--danger); font-weight: 700; }
.val-low { color: var(--warning); font-weight: 700; }

/* ── Page Headers ────────────────────────────────────────────────── */
.page-header {
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.page-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--gray-900);
}
.page-subtitle {
  font-size: .9rem;
  color: var(--gray-500);
  margin-top: 4px;
}

/* ── Grid Layouts ────────────────────────────────────────────────── */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 20px; }

/* ── Filter Bar ──────────────────────────────────────────────────── */
.filter-bar {
  display: flex;
  gap: 12px;
  align-items: flex-end;
  flex-wrap: wrap;
  padding: 16px 20px;
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  margin-bottom: 20px;
}
.filter-bar .form-group { margin-bottom: 0; }

/* ── Alert/Flash Messages ────────────────────────────────────────── */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius);
  margin-bottom: 16px;
  font-size: .9rem;
  display: flex;
  align-items: center;
  gap: 8px;
}
.alert-success { background: var(--success-bg); color: var(--success); border: 1px solid #a7f3d0; }
.alert-danger { background: var(--danger-bg); color: var(--danger); border: 1px solid #fecaca; }
.alert-warning { background: var(--warning-bg); color: var(--warning); border: 1px solid #fde68a; }
.alert-info { background: var(--info-bg); color: var(--info); border: 1px solid #a5f3fc; }

/* ── Misc ────────────────────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--gray-400);
}
.empty-state svg { width: 64px; height: 64px; margin-bottom: 16px; opacity: .5; }
.empty-state p { font-size: 1rem; margin-top: 8px; }

.tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: .75rem;
  background: var(--gray-100);
  color: var(--gray-600);
}

.text-muted { color: var(--gray-500); }
.text-sm { font-size: .85rem; }
.text-center { text-align: center; }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mb-2 { margin-bottom: 8px; }
.mb-4 { margin-bottom: 16px; }
.gap-2 { gap: 8px; }
.gap-4 { gap: 16px; }
.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }

/* ── Trend Chart Extras ──────────────────────────────────────────── */
.trend-info {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}
.trend-info-item {
  background: #fff;
  padding: 16px 20px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  flex: 1;
  min-width: 140px;
}
.trend-info-item .label { font-size: .8rem; color: var(--gray-500); margin-bottom: 4px; }
.trend-info-item .value { font-size: 1.3rem; font-weight: 700; }

/* ── Filter Buttons ──────────────────────────────────────────────── */
.filter-btn {
  background: transparent;
  color: var(--gray-500);
  border: 1px solid var(--gray-200);
  padding: 3px 12px;
  font-size: .8rem;
  border-radius: 999px;
  cursor: pointer;
  transition: all .15s ease;
  min-height: 32px;
}
.filter-btn:hover { background: var(--gray-100); color: var(--gray-700); }
.filter-btn.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* ── Row Hidden ──────────────────────────────────────────────────── */
.ind-row.row-hidden { display: none; }
.report-row.row-hidden { display: none; }
.date-separator.row-hidden { display: none; }

/* ══════════════════════════════════════════════════════════════════
   MOBILE RESPONSIVE - Tablets (768px and below)
   ══════════════════════════════════════════════════════════════════ */
@media (max-width: 768px) {
  html { font-size: 14px; }

  /* Header */
  .app-header .header-inner {
    flex-wrap: wrap;
    height: auto;
    padding: 12px 16px;
    gap: 8px;
  }

  /* Hamburger menu visible */
  .menu-toggle { display: block; }

  /* Navigation - collapsible */
  .app-nav {
    display: none;
    flex-direction: column;
    width: 100%;
    gap: 4px;
    padding-top: 8px;
    border-top: 1px solid rgba(255,255,255,.2);
  }
  .app-nav.open { display: flex; }
  .app-nav a {
    padding: 12px 16px;
    font-size: 1rem;
    border-radius: var(--radius);
  }

  /* Container */
  .container { padding: 16px; }

  /* Page header */
  .page-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  .page-title { font-size: 1.3rem; }

  /* Stat grid */
  .stat-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
  .stat-card { padding: 14px; gap: 12px; }
  .stat-icon { width: 40px; height: 40px; }
  .stat-value { font-size: 1.4rem; }

  /* Grids */
  .grid-2, .grid-3 { grid-template-columns: 1fr; }

  /* Cards */
  .card-header { padding: 12px 16px; }
  .card-body { padding: 16px; }

  /* Filter bar */
  .filter-bar {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
    padding: 12px 16px;
  }
  .filter-bar .form-group { width: 100%; margin-bottom: 0; }
  .filter-bar .form-control { width: 100%; }
  .filter-bar .flex { flex-direction: column; gap: 8px; }
  .filter-bar .btn { width: 100%; }

  /* Filter buttons - horizontal scroll */
  .filter-btn { flex-shrink: 0; }

  /* Tables */
  thead th { padding: 10px 12px; font-size: .8rem; }
  tbody td { padding: 8px 12px; font-size: .85rem; }

  /* Buttons */
  .btn { padding: 10px 16px; min-height: 44px; }
  .btn-sm { padding: 8px 14px; min-height: 40px; }

  /* Upload zone */
  .upload-zone { padding: 32px 16px; }
  .upload-zone svg { width: 40px; height: 40px; }

  /* File preview */
  .file-preview {
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: 8px;
  }

  /* Trend info */
  .trend-info { gap: 12px; }
  .trend-info-item { padding: 12px 14px; min-width: 120px; }
  .trend-info-item .value { font-size: 1.1rem; }

  /* Chart container */
  .chart-container { height: 280px; }

  /* ── Report Detail: Stack vertically ── */
  .split-container {
    flex-direction: column !important;
    gap: 0 !important;
  }
  .split-left, .split-right {
    flex: none !important;
    width: 100% !important;
    min-width: 0 !important;
  }
  .split-divider { display: none !important; }

  /* Filter bar row layout on tablet */
  .filter-bar-row {
    flex-wrap: wrap;
  }
  .filter-bar-row .form-group {
    flex: 1 1 45%;
    min-width: 0;
  }
  .filter-bar-row .form-control { width: 100%; }
}

/* ══════════════════════════════════════════════════════════════════
   MOBILE RESPONSIVE - Small phones (480px and below)
   ══════════════════════════════════════════════════════════════════ */
@media (max-width: 480px) {
  html { font-size: 13px; }

  .container { padding: 12px; }

  /* Stat grid - single column */
  .stat-grid { grid-template-columns: 1fr; }

  /* Stat card compact */
  .stat-card { padding: 12px; gap: 10px; }
  .stat-icon { width: 36px; height: 36px; }
  .stat-icon svg { width: 20px; height: 20px; }
  .stat-value { font-size: 1.2rem; }

  /* Buttons full width on small screens */
  .page-header .btn { width: 100%; }

  /* Trend info items */
  .trend-info-item { min-width: 100%; }

  /* Chart */
  .chart-container { height: 240px; }

  /* Filter buttons - horizontal scroll */
  .filter-btn { font-size: .75rem; padding: 4px 10px; }
  .card-header { flex-wrap: wrap; }
  .card-header > div { margin-left: 0; width: 100%; margin-top: 8px; }

  /* Table text smaller */
  thead th { font-size: .75rem; padding: 8px 10px; }
  tbody td { font-size: .8rem; padding: 6px 10px; }

  /* Badge smaller */
  .badge { font-size: .7rem; padding: 2px 8px; }

  /* Filter bar single column */
  .filter-bar-row .form-group {
    flex: 1 1 100%;
  }
}

/* ══════════════════════════════════════════════════════════════════
   TOUCH OPTIMIZATIONS
   ══════════════════════════════════════════════════════════════════ */
@media (hover: none) and (pointer: coarse) {
  /* Touch devices - larger tap targets */
  .btn { min-height: 44px; min-width: 44px; }
  .btn-sm { min-height: 40px; min-width: 40px; }
  .app-nav a { padding: 12px 16px; min-height: 44px; }
  .filter-btn { min-height: 36px; padding: 6px 14px; }
  .form-control { min-height: 44px; font-size: 16px; }

  /* No hover effects on touch */
  .stat-card:hover { transform: none; box-shadow: var(--shadow); }
  .card:hover { box-shadow: var(--shadow); }
  tbody tr:hover { background: transparent; }
  .row-abnormal:hover { background: #fff5f5; }

  /* Prevent double-tap zoom on buttons */
  a, button, .btn, .filter-btn, .menu-toggle { touch-action: manipulation; }

  /* Swipeable tables hint */
  .table-wrap::after {
    content: '← 横向滑动查看完整表格 →';
    display: block;
    text-align: center;
    padding: 8px;
    font-size: .75rem;
    color: var(--gray-400);
    background: var(--gray-50);
  }
  .table-wrap:has(table:not(:has(th:nth-child(5))))::after {
    display: none;
  }
}