/* Cold Monitor — Shared Design System */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
  --bg: #f1f5f9;
  --surface: #ffffff;
  --surface2: #f8fafc;
  --border: #e2e8f0;
  --border-hover: #cbd5e1;
  --accent: #4f46e5;
  --accent-hover: #4338ca;
  --accent-light: #eef2ff;
  --accent-text: #3730a3;
  --success: #10b981;
  --success-light: #ecfdf5;
  --success-text: #065f46;
  --warn: #f59e0b;
  --warn-light: #fffbeb;
  --warn-text: #92400e;
  --danger: #ef4444;
  --danger-light: #fef2f2;
  --danger-text: #991b1b;
  --text: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --sidebar-bg: #1e293b;
  --sidebar-hover: #334155;
  --sidebar-active: #4f46e5;
  --sidebar-text: #cbd5e1;
  --sidebar-text-active: #ffffff;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --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), 0 2px 4px -2px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
  --radius: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  min-height: 100vh;
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

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

.sidebar {
  width: 260px;
  background: var(--sidebar-bg);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
  transition: transform 0.3s ease;
}

.sidebar-brand {
  padding: 24px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.sidebar-brand h1 {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.03em;
  display: flex;
  align-items: center;
  gap: 10px;
}

.sidebar-brand h1 .brand-icon {
  width: 32px;
  height: 32px;
  background: var(--accent);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
}

.sidebar-brand .brand-sub {
  font-size: 0.72rem;
  color: var(--sidebar-text);
  margin-top: 4px;
  font-weight: 400;
}

.sidebar-nav {
  flex: 1;
  padding: 12px 0;
  overflow-y: auto;
}

.nav-section {
  padding: 0 12px;
  margin-bottom: 8px;
}

.nav-section-label {
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  padding: 8px 12px 6px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  border-radius: var(--radius);
  color: var(--sidebar-text);
  cursor: pointer;
  font-size: 0.88rem;
  font-weight: 500;
  transition: all 0.15s;
  text-decoration: none;
  margin: 1px 0;
}

.nav-item:hover {
  background: var(--sidebar-hover);
  color: #fff;
}

.nav-item.active {
  background: var(--sidebar-active);
  color: var(--sidebar-text-active);
}

.nav-item .nav-icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  opacity: 0.8;
}

.nav-item.active .nav-icon { opacity: 1; }

.nav-item .nav-badge {
  margin-left: auto;
  background: rgba(255,255,255,0.12);
  color: var(--sidebar-text);
  padding: 2px 8px;
  border-radius: 99px;
  font-size: 0.7rem;
  font-weight: 600;
}

.nav-item.active .nav-badge {
  background: rgba(255,255,255,0.2);
  color: #fff;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid rgba(255,255,255,0.08);
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.sidebar-user .user-avatar {
  width: 36px;
  height: 36px;
  background: var(--accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #fff;
  font-size: 0.85rem;
}

.sidebar-user .user-info {
  flex: 1;
  min-width: 0;
}

.sidebar-user .user-name {
  font-size: 0.82rem;
  font-weight: 600;
  color: #fff;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-user .user-role {
  font-size: 0.7rem;
  color: var(--sidebar-text);
  text-transform: capitalize;
}

.main-content {
  flex: 1;
  margin-left: 260px;
  min-height: 100vh;
}

/* ── Top Bar ── */
.top-bar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 16px 28px;
  display: flex;
  align-items: center;
  gap: 16px;
  position: sticky;
  top: 0;
  z-index: 50;
}

.top-bar h2 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
}

.top-bar-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ── Page Content ── */
.page-content {
  padding: 24px 28px;
}

/* ── Cards ── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.card-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-header h3 {
  font-size: 0.92rem;
  font-weight: 600;
}

.card-body {
  padding: 20px;
}

.card-footer {
  padding: 12px 20px;
  border-top: 1px solid var(--border);
  background: var(--surface2);
}

/* ── Buttons ── */
button, .btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius);
  font-weight: 600;
  font-family: 'Inter', sans-serif;
  font-size: 0.82rem;
  cursor: pointer;
  transition: all 0.15s;
  border: 1px solid transparent;
  text-decoration: none;
  line-height: 1.4;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}

.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border-color: var(--border);
}
.btn-secondary:hover {
  background: var(--surface2);
  border-color: var(--border-hover);
}

.btn-success {
  background: var(--success);
  color: #fff;
  border-color: var(--success);
}
.btn-success:hover { filter: brightness(0.9); }

.btn-danger {
  background: var(--surface);
  color: var(--danger);
  border-color: var(--danger);
}
.btn-danger:hover {
  background: var(--danger-light);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: transparent;
  padding: 6px 10px;
}
.btn-ghost:hover {
  background: var(--surface2);
  color: var(--text);
}

.btn-sm {
  padding: 5px 10px;
  font-size: 0.76rem;
}

.btn-lg {
  padding: 10px 24px;
  font-size: 0.92rem;
}

.btn-icon {
  padding: 6px;
  width: 32px;
  height: 32px;
  justify-content: center;
}

/* ── Form Elements ── */
input[type="text"], input[type="email"], input[type="password"],
input[type="search"], input[type="date"], textarea, select {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: 'Inter', sans-serif;
  font-size: 0.88rem;
  color: var(--text);
  background: var(--surface);
  transition: border-color 0.15s, box-shadow 0.15s;
  line-height: 1.4;
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(79,70,229,0.1);
}

label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}

.form-group {
  margin-bottom: 16px;
}

.form-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ── Tables ── */
.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

thead th {
  text-align: left;
  padding: 10px 16px;
  font-size: 0.76rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  background: var(--surface2);
  border-bottom: 1px solid var(--border);
}

tbody td {
  padding: 12px 16px;
  font-size: 0.88rem;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

tbody tr:hover { background: var(--surface2); }
tbody tr:last-child td { border-bottom: none; }

/* ── Badges ── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: 99px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.badge-success {
  background: var(--success-light);
  color: var(--success-text);
}

.badge-warn {
  background: var(--warn-light);
  color: var(--warn-text);
}

.badge-danger {
  background: var(--danger-light);
  color: var(--danger-text);
}

.badge-neutral {
  background: var(--surface2);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.badge-muted {
  background: var(--surface2);
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.badge-accent {
  background: var(--accent-light);
  color: var(--accent-text);
}

/* ── Status Dots ── */
.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.status-dot.online { background: var(--success); box-shadow: 0 0 0 3px rgba(16,185,129,0.2); }
.status-dot.stale { background: var(--warn); box-shadow: 0 0 0 3px rgba(245,158,11,0.2); }
.status-dot.offline { background: var(--text-muted); }

/* ── Stat Cards ── */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px;
  box-shadow: var(--shadow-sm);
}

.stat-card .stat-label {
  font-size: 0.76rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.stat-card .stat-value {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.2;
}

.stat-card .stat-unit {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ── Employee Cards (Dashboard Grid) ── */
.emp-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 20px;
}

.emp-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: box-shadow 0.2s, border-color 0.2s;
}

.emp-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--border-hover);
}

.emp-card-header {
  padding: 18px 20px 14px;
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.emp-card-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent-light);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
  flex-shrink: 0;
}

.emp-card-info { flex: 1; min-width: 0; }

.emp-card-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.emp-card-meta {
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

.emp-card-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.emp-stat {
  background: var(--surface);
  padding: 12px 14px;
  text-align: center;
}

.emp-stat-value {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
}

.emp-stat-label {
  font-size: 0.68rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-top: 2px;
}

.emp-card-actions {
  padding: 14px 20px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

/* ── Modals ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15,23,42,0.5);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.modal {
  background: var(--surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  width: 90%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-header {
  padding: 20px 24px 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-header h3 {
  font-size: 1.05rem;
  font-weight: 700;
}

.modal-body { padding: 20px 24px; }

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}

/* ── Alert Boxes ── */
.alert {
  padding: 14px 18px;
  border-radius: var(--radius);
  font-size: 0.85rem;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 16px;
}

.alert-info {
  background: var(--accent-light);
  color: var(--accent-text);
  border: 1px solid rgba(79,70,229,0.2);
}

.alert-success {
  background: var(--success-light);
  color: var(--success-text);
  border: 1px solid rgba(16,185,129,0.2);
}

.alert-warn {
  background: var(--warn-light);
  color: var(--warn-text);
  border: 1px solid rgba(245,158,11,0.2);
}

.alert-danger {
  background: var(--danger-light);
  color: var(--danger-text);
  border: 1px solid rgba(239,68,68,0.2);
}

/* ── Score Rings ── */
.score-ring {
  position: relative;
  width: 80px;
  height: 80px;
}

.score-ring svg {
  transform: rotate(-90deg);
  width: 80px;
  height: 80px;
}

.score-ring .ring-bg {
  fill: none;
  stroke: var(--border);
  stroke-width: 6;
}

.score-ring .ring-fill {
  fill: none;
  stroke-width: 6;
  stroke-linecap: round;
  transition: stroke-dashoffset 0.8s ease;
}

.score-ring .ring-label {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 700;
}

/* ── Empty State ── */
.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-muted);
}

.empty-state .empty-icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
  opacity: 0.5;
}

.empty-state h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.empty-state p {
  font-size: 0.85rem;
  max-width: 320px;
  margin: 0 auto;
}

/* ── Utility ── */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }
.gap-6 { gap: 24px; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 12px; }
.mt-4 { margin-top: 16px; }
.mb-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }
.text-sm { font-size: 0.82rem; }
.text-xs { font-size: 0.72rem; }
.text-muted { color: var(--text-secondary); }
.text-center { text-align: center; }
.font-bold { font-weight: 700; }
.font-medium { font-weight: 500; }
.w-full { width: 100%; }
.hidden { display: none !important; }
.truncate { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* ── Responsive ── */
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .main-content { margin-left: 0; }
  .emp-grid { grid-template-columns: 1fr; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
  .emp-card-stats { grid-template-columns: repeat(2, 1fr); }
  .top-bar { padding: 12px 16px; }
  .page-content { padding: 16px; }
}

/* ── Loading spinner ── */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ── Flatpickr overrides ── */
.flatpickr-calendar {
  border-radius: var(--radius-lg) !important;
  box-shadow: var(--shadow-lg) !important;
  border: 1px solid var(--border) !important;
}