:root {
  --bg-dark: #f8f9fa; /* Soft Gray background */
  --bg-sidebar: #ffffff; /* White sidebar */
  --bg-card: #ffffff; /* White card surface */
  --bg-hover: #f1f5f9; /* Slate 100 hover state */
  --border-color: #e2e8f0; /* Slate 200 border */
  --primary: #00478d; /* Healing Blue */
  --primary-glow: rgba(0, 71, 141, 0.1);
  --accent: #006a6a; /* Trust Teal */
  --amber: #d97706; /* Darker amber */
  --red: #dc2626; /* Darker red */
  --text-main: #0f172a; /* Slate 900 */
  --text-muted: #475569; /* Slate 600 */
  --font: 'Inter', sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: var(--font);
}

body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  min-height: 100vh;
}

.admin-shell {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.admin-sidebar {
  width: 260px;
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.brand-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.brand-name {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--primary);
}

.brand-sub {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex: 1;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  text-align: left;
  transition: all 0.2s;
}

.nav-item:hover {
  background: var(--bg-hover);
  color: var(--primary);
}

.nav-item.active {
  background: rgba(0, 71, 141, 0.08);
  color: var(--primary);
  border-left: 3px solid var(--primary);
}

.sidebar-footer {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

.btn-sidebar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.6rem;
  border-radius: 8px;
  background: var(--primary);
  color: #fff;
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  transition: background 0.2s;
}

.btn-sidebar:hover {
  background: var(--accent);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
}

/* Main */
.admin-main {
  flex: 1;
  padding: 2rem;
  overflow-y: auto;
}

.admin-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.admin-header h1 {
  font-size: 1.8rem;
  font-weight: 700;
}

.header-sub {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 0.25rem;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.btn-primary-action {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  border: none;
  padding: 0.65rem 1.2rem;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  box-shadow: 0 4px 14px rgba(0, 71, 141, 0.2);
  transition: transform 0.2s;
}

.btn-primary-action:hover {
  transform: translateY(-2px);
}

.btn-refresh {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.6rem 1.2rem;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: background 0.2s;
}

.btn-refresh:hover {
  background: var(--bg-hover);
}

.db-badge {
  font-size: 0.8rem;
  padding: 0.5rem 0.9rem;
  border-radius: 999px;
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent);
  border: 1px solid rgba(16, 185, 129, 0.3);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.db-badge.offline {
  background: rgba(239, 68, 68, 0.15);
  color: var(--red);
  border-color: rgba(239, 68, 68, 0.3);
}

/* Tabs */
.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

/* KPI Grid */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.kpi-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 1.25rem;
  border-radius: 12px;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.kpi-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
}

.kpi-icon.blue { background: rgba(59, 130, 246, 0.15); color: var(--primary); }
.kpi-icon.red { background: rgba(239, 68, 68, 0.15); color: var(--red); }
.kpi-icon.amber { background: rgba(245, 158, 11, 0.15); color: var(--amber); }
.kpi-icon.green { background: rgba(16, 185, 129, 0.15); color: var(--accent); }

.kpi-label {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.kpi-val {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-main);
  margin-top: 0.2rem;
}

/* Dashboard Grid */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
  gap: 1.5rem;
}

.panel-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.25rem;
  margin-bottom: 1.5rem;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.panel-header h3 {
  font-size: 1.1rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.link-btn {
  background: none;
  border: none;
  color: var(--primary);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
}

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

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

.data-table th {
  padding: 0.75rem 1rem;
  background: rgba(255, 255, 255, 0.02);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  border-bottom: 1px solid var(--border-color);
}

.data-table td {
  padding: 0.9rem 1rem;
  border-bottom: 1px solid var(--border-color);
}

.data-table tbody tr:hover {
  background: var(--bg-hover);
}

.empty-msg {
  text-align: center;
  color: var(--text-muted);
  padding: 2rem !important;
}

/* Badges & Tags */
.badge-temp {
  display: inline-block;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-temp.hot { background: rgba(239, 68, 68, 0.15); color: var(--red); }
.badge-temp.warm { background: rgba(245, 158, 11, 0.15); color: var(--amber); }
.badge-temp.cold { background: rgba(59, 130, 246, 0.15); color: var(--primary); }

.priority-badge {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
}

.priority-badge.high { background: rgba(239, 68, 68, 0.15); color: var(--red); }
.priority-badge.normal { background: rgba(59, 130, 246, 0.15); color: var(--primary); }

.symptom-tag {
  display: inline-block;
  padding: 0.25rem 0.6rem;
  border-radius: 6px;
  background: rgba(245, 158, 11, 0.1);
  color: var(--amber);
  font-size: 0.8rem;
  font-weight: 500;
  border: 1px solid rgba(245, 158, 11, 0.2);
}

.date-pill {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  background: rgba(59, 130, 246, 0.1);
  color: var(--primary);
  font-size: 0.8rem;
  font-weight: 500;
}

.btn-action-sm {
  background: var(--bg-hover);
  border: 1px solid var(--border-color);
  color: var(--primary);
  padding: 0.35rem 0.7rem;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  transition: all 0.2s;
}

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

/* Toolbar */
.toolbar {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.search-box {
  position: relative;
  flex: 1;
  max-width: 400px;
}

.search-icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
}

.search-box input {
  width: 100%;
  padding: 0.7rem 1rem 0.7rem 2.5rem;
  border-radius: 8px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  outline: none;
}

.btn-secondary {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.7rem 1.2rem;
  border-radius: 8px;
  cursor: pointer;
}

/* Doctor Admin Cards */
.doctors-grid-admin {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}

.doc-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.5rem;
  text-align: center;
}

.doc-avatar {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: rgba(0, 71, 141, 0.08);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin: 0 auto 1rem;
}

.doc-spec {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.doc-schedule {
  margin: 1rem 0;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.doc-status.available {
  display: inline-block;
  padding: 0.3rem 0.8rem;
  border-radius: 999px;
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 500;
}

/* Modal Styling */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

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

.modal-card {
  background: var(--bg-sidebar);
  border: 1px solid var(--border-color);
  width: 90%;
  max-width: 550px;
  border-radius: 16px;
  padding: 1.5rem;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
  font-size: 1.2rem;
  font-weight: 700;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.form-group label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
}

.form-group input, .form-group select, .form-group textarea {
  background: var(--bg-deep);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.65rem 0.9rem;
  border-radius: 8px;
  outline: none;
  font-size: 0.9rem;
}

.form-group select option {
  background: var(--bg-surface);
  color: var(--text-main);
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

/* Login screen overlay styles */
.login-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(241, 245, 249, 0.85);
  backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  opacity: 1;
  pointer-events: auto;
  transition: opacity 0.35s ease;
}

.login-backdrop.hidden {
  opacity: 0;
  pointer-events: none;
}

.login-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  width: 90%;
  max-width: 420px;
  border-radius: 16px;
  padding: 2.5rem 2rem;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.06);
}

.login-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.75rem;
  justify-content: center;
}

.login-title {
  font-size: 1.3rem;
  font-weight: 700;
  text-align: center;
  color: var(--text-main);
  margin-bottom: 1.5rem;
}