:root {
  --primary: #2563EB;
  --primary-dark: #1d4ed8;
  --success: #16a34a;
  --warning: #d97706;
  --danger: #DC2626;
  --orange: #ea580c;
  --purple: #7c3aed;
  --teal: #0d9488;
  --amber: #f59e0b;
  --sidebar-bg: #1e40af;
  --sidebar-text: #bfdbfe;
  --sidebar-active: #93c5fd;
  --bg: #ffffff;
  --surface: #ffffff;
  --border: #dbeafe;
  --text: #0f172a;
  --text-muted: #64748b;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; background: var(--bg); color: var(--text); font-size: 14px; line-height: 1.5; }

/* Layout */
.app { display: flex; min-height: 100vh; }

/* Sidebar */
.sidebar { width: 220px; min-width: 220px; background: var(--sidebar-bg); display: flex; flex-direction: column; position: fixed; height: 100vh; z-index: 100; }
.sidebar-brand { display: flex; align-items: center; gap: 10px; padding: 20px 16px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.brand-icon { font-size: 24px; }
.brand-name { font-weight: 700; color: #fff; font-size: 15px; }
.brand-sub { color: var(--sidebar-text); font-size: 11px; }

.sidebar-nav { flex: 1; padding: 12px 8px; overflow-y: auto; }
.nav-item { display: flex; align-items: center; gap: 8px; padding: 9px 10px; border-radius: 6px; color: var(--sidebar-text); text-decoration: none; font-size: 13.5px; transition: all 0.15s; }
.nav-item:hover { background: rgba(255,255,255,0.07); color: #fff; }
.nav-item.active { background: rgba(147,197,253,0.2); color: #fff; font-weight: 600; }
.nav-icon { font-size: 15px; width: 20px; text-align: center; }
.nav-section { font-size: 10px; font-weight: 700; letter-spacing: .08em; color: rgba(255,255,255,0.3); padding: 14px 10px 4px; text-transform: uppercase; }

.sidebar-footer { padding: 12px 16px; border-top: 1px solid rgba(255,255,255,0.08); display: flex; align-items: center; gap: 8px; }
.user-avatar { width: 32px; height: 32px; border-radius: 50%; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 13px; flex-shrink: 0; }
.user-name { color: #fff; font-size: 13px; font-weight: 500; }
.user-role { color: var(--sidebar-text); font-size: 11px; text-transform: capitalize; }
.btn-logout { margin-left: auto; color: var(--sidebar-text); text-decoration: none; font-size: 18px; padding: 4px; }

/* Main */
.main { margin-left: 220px; flex: 1; display: flex; flex-direction: column; min-height: 100vh; }
.topbar { background: var(--surface); border-bottom: 1px solid var(--border); padding: 0 24px; height: 56px; display: flex; align-items: center; justify-content: space-between; }
.page-title { font-size: 18px; font-weight: 700; }
.topbar-actions { display: flex; gap: 8px; align-items: center; }
.content { padding: 24px; flex: 1; }

/* Flash */
.flash { padding: 12px 20px; margin: 0 24px 0; border-radius: 0 0 var(--radius) var(--radius); font-size: 13.5px; font-weight: 500; }
.flash-success { background: #dcfce7; color: #15803d; border: 1px solid #bbf7d0; }
.flash-error { background: #fee2e2; color: #b91c1c; border: 1px solid #fecaca; }

/* Cards */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); margin-bottom: 20px; }
.card-header { padding: 14px 18px; border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; }
.card-header h3 { font-size: 14px; font-weight: 700; display: flex; align-items: center; gap: 8px; }
.card-body { padding: 18px; }
.card-body.p0 { padding: 0; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; padding: 8px 16px; border-radius: 6px; font-size: 13.5px; font-weight: 500; cursor: pointer; text-decoration: none; border: none; transition: all 0.15s; white-space: nowrap; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #15803d; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #b91c1c; }
.btn-secondary { background: #eff6ff; color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { background: #dbeafe; }
.btn-ghost { background: transparent; color: var(--text-muted); }
.btn-ghost:hover { background: #eff6ff; color: var(--text); }
.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-lg { padding: 12px 24px; font-size: 15px; }
.btn-block { width: 100%; }
.btn-icon { padding: 4px 6px; }

/* Badges */
.badge { display: inline-flex; align-items: center; padding: 2px 8px; border-radius: 20px; font-size: 11px; font-weight: 600; }
.badge-lg { padding: 4px 12px; font-size: 13px; }
.badge-blue { background: #dbeafe; color: #1d4ed8; }
.badge-green { background: #dcfce7; color: #15803d; }
.badge-red { background: #fee2e2; color: #b91c1c; }
.badge-amber { background: #fef3c7; color: #b45309; }
.badge-orange { background: #ffedd5; color: #c2410c; }
.badge-gray { background: #f1f5f9; color: #475569; }
.badge-purple { background: #ede9fe; color: #6d28d9; }

/* Tables */
.table { width: 100%; border-collapse: collapse; }
.table th { padding: 10px 14px; text-align: left; font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; color: var(--text-muted); border-bottom: 1px solid var(--border); background: #f0f7ff; }
.table td { padding: 11px 14px; border-bottom: 1px solid #f0f7ff; vertical-align: middle; }
.table tr:last-child td { border-bottom: none; }
.table-hover tbody tr:hover td { background: #eff6ff; }
.table-sm th, .table-sm td { padding: 7px 12px; }

/* Stats grid */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 14px; margin-bottom: 24px; }
.stat-card { background: var(--surface); border-radius: var(--radius); padding: 16px; display: flex; align-items: center; gap: 12px; border: 1px solid var(--border); box-shadow: var(--shadow); }
.stat-icon { font-size: 28px; }
.stat-value { font-size: 24px; font-weight: 800; line-height: 1; }
.stat-label { font-size: 12px; color: var(--text-muted); margin-top: 2px; }
.stat-blue .stat-value { color: var(--primary); }
.stat-green .stat-value { color: var(--success); }
.stat-red .stat-value { color: var(--danger); }
.stat-amber .stat-value { color: var(--amber); }
.stat-orange .stat-value { color: var(--orange); }
.stat-purple .stat-value { color: var(--purple); }
.stat-teal .stat-value { color: var(--teal); }

/* Dashboard grid */
.dashboard-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 900px) { .dashboard-grid { grid-template-columns: 1fr; } }

/* Toolbar */
.toolbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 18px; flex-wrap: wrap; }
.search-form { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.search-input { padding: 7px 12px; border: 1px solid var(--border); border-radius: 6px; font-size: 13px; width: 250px; }
.search-input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37,99,235,0.1); }

/* Forms */
.form-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 5px; }
.form-group label { font-size: 13px; font-weight: 600; color: var(--text); }
.form-group input, .form-group select, .form-group textarea { padding: 8px 12px; border: 1px solid var(--border); border-radius: 6px; font-size: 13.5px; font-family: inherit; background: #fff; transition: border-color 0.15s; }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37,99,235,0.1); }
.form-section { font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: var(--primary); border-bottom: 2px solid var(--border); padding-bottom: 6px; margin: 20px 0 14px; }
.form-actions { display: flex; gap: 10px; align-items: center; margin-top: 24px; }
.label-check { display: flex; align-items: center; gap: 8px; cursor: pointer; font-weight: 600; }
.label-check input { width: auto; }
.input-sm { padding: 5px 9px; border: 1px solid var(--border); border-radius: 5px; font-size: 12.5px; }
.select-sm { padding: 5px 9px; border: 1px solid var(--border); border-radius: 5px; font-size: 12.5px; background: #fff; }

/* Alerts */
.alert { padding: 10px 14px; border-radius: 6px; font-size: 13px; }
.alert-warning { background: #fef3c7; color: #92400e; border: 1px solid #fde68a; }
.alert-info { background: #eff6ff; color: #1e40af; border: 1px solid #bfdbfe; }
.alert-success { background: #dcfce7; color: #15803d; border: 1px solid #bbf7d0; }

/* Student cells */
.student-cell { display: flex; align-items: center; gap: 10px; }
.avatar-sm { width: 32px; height: 32px; border-radius: 50%; object-fit: cover; }
.avatar-placeholder { width: 32px; height: 32px; border-radius: 50%; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 12px; flex-shrink: 0; }
.avatar-placeholder-lg { width: 64px; height: 64px; border-radius: 50%; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 22px; }
.student-avatar-lg img { width: 64px; height: 64px; border-radius: 50%; object-fit: cover; }
.student-header { display: flex; align-items: center; gap: 18px; margin-bottom: 22px; }
.student-header-info h2 { font-size: 20px; font-weight: 800; }
.student-meta { display: flex; gap: 8px; align-items: center; margin-top: 6px; flex-wrap: wrap; }
.student-header-actions { margin-left: auto; display: flex; gap: 8px; }
.student-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 20px; }
@media (max-width: 700px) { .student-grid { grid-template-columns: 1fr; } }

/* Info list */
.info-list { display: flex; flex-direction: column; gap: 8px; }
.info-row { display: flex; justify-content: space-between; align-items: center; padding: 4px 0; border-bottom: 1px solid #f8fafc; }
.info-row:last-child { border-bottom: none; }
.info-label { font-size: 12px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: .03em; }

/* Check-in form */
.checkin-layout { display: grid; grid-template-columns: 260px 1fr; gap: 20px; align-items: start; }
@media (max-width: 900px) { .checkin-layout { grid-template-columns: 1fr; } }
.checks-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.check-item { display: flex; gap: 10px; padding: 14px; border: 2px solid var(--border); border-radius: 8px; cursor: pointer; transition: all 0.15s; }
.check-item:has(input:checked) { border-color: var(--success); background: #f0fdf4; }
.check-item input { width: 16px; height: 16px; margin-top: 2px; flex-shrink: 0; }
.check-icon { font-size: 22px; }
.check-label { font-weight: 700; font-size: 13px; }
.check-sub { font-size: 11px; color: var(--text-muted); }

/* Photo upload grid */
.photo-upload-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 12px; }
.photo-upload-item { display: flex; flex-direction: column; gap: 4px; }
.photo-upload-item input[type="file"] { display: none; }
.photo-upload-label { cursor: pointer; }
.photo-upload-preview { width: 100%; aspect-ratio: 4/3; border: 2px dashed var(--border); border-radius: 8px; overflow: hidden; display: flex; align-items: center; justify-content: center; background: #f8fafc; transition: all 0.15s; position: relative; }
.photo-upload-label:hover .photo-upload-preview { border-color: var(--primary); background: #eff6ff; }
.photo-upload-item.has-photo .photo-upload-preview { border-color: var(--success); border-style: solid; }
.photo-upload-item.has-checkin .photo-upload-preview { border-color: var(--amber); }
.photo-upload-placeholder { display: flex; flex-direction: column; align-items: center; gap: 4px; color: var(--text-muted); }
.photo-upload-icon { font-size: 24px; }
.photo-upload-name { font-size: 11px; text-align: center; color: var(--text-muted); font-weight: 600; }
.photo-overlay { position: absolute; inset: 0; background: rgba(0,0,0,0.5); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 11px; font-weight: 600; border-radius: 6px; }

/* Deposit calc */
.deposit-calc { display: flex; flex-direction: column; gap: 8px; }
.deposit-row { display: flex; justify-content: space-between; align-items: center; }
.deposit-total { padding-top: 8px; font-size: 16px; }
.deposit-input { display: flex; align-items: center; gap: 4px; }

/* Photo grid */
.photo-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 10px; }
.photo-item img { width: 100%; aspect-ratio: 4/3; object-fit: cover; border-radius: 6px; border: 1px solid var(--border); display: block; }
.photo-label { font-size: 11px; color: var(--text-muted); margin-top: 3px; text-align: center; }

/* AI Results */
.ai-results-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.ai-result-card { border: 2px solid var(--border); border-radius: 8px; overflow: hidden; }
.ai-ok { border-color: #bbf7d0; }
.ai-leve { border-color: #fde68a; }
.ai-moderado { border-color: #fed7aa; }
.ai-grave { border-color: #fecaca; }
.ai-result-header { padding: 10px 14px; display: flex; justify-content: space-between; align-items: center; background: #f8fafc; }
.ai-ok .ai-result-header { background: #f0fdf4; }
.ai-leve .ai-result-header { background: #fefce8; }
.ai-moderado .ai-result-header { background: #fff7ed; }
.ai-grave .ai-result-header { background: #fff1f2; }
.ai-zone-name { font-weight: 700; font-size: 13px; }
.ai-photos { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; padding: 8px; }
.ai-photo img { width: 100%; aspect-ratio: 4/3; object-fit: cover; border-radius: 4px; }
.ai-photo-label { font-size: 10px; text-align: center; color: var(--text-muted); margin-top: 2px; }
.ai-result-body { padding: 10px 14px; }
.ai-description { font-size: 12.5px; color: var(--text); margin-bottom: 6px; }
.ai-damage-list { list-style: none; padding: 0; }
.ai-damage-list li::before { content: '• '; color: var(--danger); }
.ai-damage-list li { font-size: 12px; color: var(--text-muted); }
.ai-cost { margin-top: 6px; font-size: 13px; color: var(--danger); }

/* Rooms grid */
.rooms-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 16px; }
.room-card { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; overflow: hidden; box-shadow: var(--shadow); }
.room-card.occupied { border-top: 3px solid var(--primary); }
.room-card.available { border-top: 3px solid var(--success); }
.room-card.maintenance { border-top: 3px solid var(--orange); }
.room-card.cleaning { border-top: 3px solid var(--amber); }
.room-card-header { padding: 14px 16px 8px; display: flex; justify-content: space-between; align-items: center; }
.room-number { font-size: 18px; font-weight: 800; }
.room-card-body { padding: 0 16px 12px; }
.room-meta { display: flex; flex-wrap: wrap; gap: 8px; font-size: 12px; color: var(--text-muted); margin: 6px 0; }
.room-card-footer { padding: 10px 16px; border-top: 1px solid var(--border); background: #f8fafc; display: flex; gap: 6px; flex-wrap: wrap; }
.room-detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 700px) { .room-detail-grid { grid-template-columns: 1fr; } }
.room-status-bar { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }

/* Incidents */
.incident-item { padding: 10px 0; border-bottom: 1px solid #f1f5f9; }
.incident-item:last-child { border-bottom: none; }
.incident-main { display: flex; align-items: center; gap: 8px; }
.incident-title { font-weight: 600; font-size: 13.5px; text-decoration: none; color: var(--text); }
.incident-meta { font-size: 12px; color: var(--text-muted); margin-top: 2px; }

/* Checkin items */
.checkin-item { padding: 10px 0; border-bottom: 1px solid #f1f5f9; }
.checkin-item:last-child { border-bottom: none; }
.checkin-date { font-size: 13px; font-weight: 700; color: var(--text); }
.checkin-checks { font-size: 12px; margin-top: 2px; color: var(--text-muted); }

/* Documents */
.doc-item { display: flex; align-items: center; gap: 8px; padding: 7px 0; border-bottom: 1px solid #f1f5f9; }
.doc-item:last-child { border-bottom: none; }
.doc-icon { font-size: 18px; }
.upload-form { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; padding-bottom: 14px; border-bottom: 1px solid var(--border); margin-bottom: 12px; }

/* Report */
.report-summary-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 20px; }
@media (max-width: 700px) { .report-summary-grid { grid-template-columns: 1fr; } }
.report-status { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }

/* Photo comparison */
.photo-compare-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }
.photo-compare-card { border: 1px solid var(--border); border-radius: 8px; overflow: hidden; background: #fafcff; }
.photo-compare-label { padding: 8px 12px; font-size: 13px; font-weight: 700; background: #eff6ff; border-bottom: 1px solid var(--border); display: flex; align-items: center; gap: 6px; }
.photo-compare-row { display: grid; grid-template-columns: 1fr 1fr; }
.photo-compare-side { display: flex; flex-direction: column; }
.photo-compare-side:first-child { border-right: 1px solid var(--border); }
.photo-compare-tag { text-align: center; font-size: 10px; font-weight: 700; letter-spacing: .06em; padding: 4px; text-transform: uppercase; }
.tag-in { background: #dbeafe; color: #1d4ed8; }
.tag-out { background: #fef3c7; color: #b45309; }
.photo-compare-img { width: 100%; aspect-ratio: 4/3; object-fit: cover; display: block; cursor: zoom-in; transition: opacity 0.15s; }
.photo-compare-img:hover { opacity: 0.85; }
.photo-compare-empty { aspect-ratio: 4/3; display: flex; align-items: center; justify-content: center; color: var(--text-muted); font-size: 12px; background: #f8faff; }
.photo-compare-ai { padding: 6px 8px; font-size: 11px; color: #92400e; background: #fffbeb; border-top: 1px solid #fde68a; line-height: 1.4; }

/* Login */
.login-page { background: #ffffff; min-height: 100vh; display: flex; align-items: center; justify-content: center; }
.login-container { background: #fff; border-radius: 14px; padding: 40px; width: 100%; max-width: 380px; box-shadow: var(--shadow-md); }
.login-brand { text-align: center; margin-bottom: 28px; }
.login-icon { font-size: 50px; margin-bottom: 10px; }
.login-brand h1 { font-size: 22px; font-weight: 800; color: var(--text); }
.login-brand p { color: var(--text-muted); font-size: 13px; margin-top: 4px; }
.login-form .form-group { margin-bottom: 16px; }
.login-form input { width: 100%; }

/* Utilities */
.fw-bold { font-weight: 700; }
.text-muted { color: var(--text-muted) !important; }
.text-sm { font-size: 12px; }
.text-green { color: var(--success) !important; }
.text-red { color: var(--danger) !important; }
.text-amber { color: var(--amber) !important; }
.text-center { text-align: center; }
.text-right { text-align: right; }
.link-sm { font-size: 12.5px; color: var(--primary); text-decoration: none; }
.link-sm:hover { text-decoration: underline; }
.mt-1 { margin-top: 6px; }
.mt-2 { margin-top: 12px; }
.mb-2 { margin-bottom: 8px; }
.action-btns { display: flex; gap: 6px; flex-wrap: wrap; }
.photo-preview { height: 80px; width: auto; border-radius: 6px; border: 1px solid var(--border); object-fit: cover; }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 3px; }

/* Hamburger (hidden on desktop) */
.btn-hamburger { display: none; flex-direction: column; justify-content: center; gap: 5px; background: none; border: none; cursor: pointer; padding: 6px; border-radius: 6px; flex-shrink: 0; }
.btn-hamburger span { display: block; width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: all 0.2s; }
.btn-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.btn-hamburger.open span:nth-child(2) { opacity: 0; }
.btn-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Sidebar overlay */
.sidebar-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.45); z-index: 150; }
.sidebar-overlay.open { display: block; }

/* Bottom nav (hidden on desktop) */
.bottom-nav { display: none; }

/* ===== MOBILE ===== */
@media (max-width: 768px) {
  /* Sidebar slide-in */
  .sidebar { transform: translateX(-100%); transition: transform 0.25s ease; z-index: 200; }
  .sidebar.open { transform: translateX(0); box-shadow: 4px 0 24px rgba(0,0,0,0.25); }

  /* Main layout */
  .main { margin-left: 0; padding-bottom: 68px; }
  .topbar { padding: 0 12px; gap: 10px; }
  .content { padding: 14px; }

  /* Show hamburger */
  .btn-hamburger { display: flex; }

  /* Page title smaller */
  .page-title { font-size: 15px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 180px; }

  /* Bottom nav */
  .bottom-nav { display: flex; position: fixed; bottom: 0; left: 0; right: 0; background: var(--sidebar-bg); z-index: 100; border-top: 1px solid rgba(255,255,255,0.1); padding-bottom: env(safe-area-inset-bottom, 0); }
  .bottom-nav-item { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 8px 4px; color: var(--sidebar-text); text-decoration: none; font-size: 10px; gap: 2px; min-height: 56px; }
  .bottom-nav-item.active { color: #fff; }
  .bottom-nav-item.active .bottom-nav-icon { filter: drop-shadow(0 0 4px rgba(255,255,255,0.5)); }
  .bottom-nav-icon { font-size: 20px; line-height: 1; }
  .bottom-nav-add { background: rgba(255,255,255,0.08); }

  /* Stats: 2 columns */
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .stat-card { padding: 12px; gap: 8px; }
  .stat-icon { font-size: 22px; }
  .stat-value { font-size: 20px; }

  /* Tables: horizontal scroll */
  .card-body.p0 { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .table { min-width: 480px; }
  .table th, .table td { padding: 9px 10px; font-size: 12.5px; }

  /* Forms: single column */
  .form-grid-2 { grid-template-columns: 1fr; }
  .form-group input, .form-group select, .form-group textarea { font-size: 16px; } /* prevent iOS zoom */

  /* Toolbar: stack vertically */
  .toolbar { flex-direction: column; align-items: stretch; gap: 8px; }
  .search-form { flex-direction: column; align-items: stretch; }
  .search-input { width: 100%; }

  /* Cards */
  .card { margin-bottom: 14px; }
  .card-header { padding: 11px 14px; flex-wrap: wrap; gap: 6px; }
  .card-body { padding: 14px; }

  /* Photo comparison */
  .photo-compare-grid { grid-template-columns: 1fr; }
  .photo-compare-card { border-radius: 6px; }

  /* Photo upload */
  .photo-upload-grid { grid-template-columns: repeat(3, 1fr); gap: 8px; }

  /* Check-in layout */
  .checkin-layout { grid-template-columns: 1fr; }
  .checks-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
  .check-item { padding: 10px; }

  /* Student header */
  .student-header { flex-direction: column; align-items: flex-start; gap: 10px; margin-bottom: 14px; }
  .student-header-actions { margin-left: 0; width: 100%; flex-wrap: wrap; }
  .student-header-actions a { flex: 1; min-width: 120px; justify-content: center; }
  .student-grid { grid-template-columns: 1fr; gap: 14px; margin-bottom: 14px; }

  /* Dashboard grid */
  .dashboard-grid { grid-template-columns: 1fr; gap: 14px; }

  /* Rooms grid */
  .rooms-grid { grid-template-columns: 1fr 1fr; gap: 10px; }

  /* Report */
  .report-summary-grid { grid-template-columns: 1fr; }
  .room-detail-grid { grid-template-columns: 1fr; }

  /* Buttons bigger tap targets */
  .btn { min-height: 40px; }
  .btn-sm { min-height: 32px; }

  /* AI results */
  .ai-results-grid { grid-template-columns: 1fr; }

  /* Flash messages */
  .flash { margin: 0 14px 0; }

  /* Login */
  .login-container { padding: 28px 20px; margin: 16px; max-width: 100%; }
}