/* ==========================================
   eClinic - Medical Record Portal
   Main Stylesheet
   ========================================== */

:root {
  /* Primary Colors - from logo */
  --primary-teal: #3DBDB8;
  --primary-blue: #2B7EC1;
  --primary-dark-blue: #1A5F8B;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--primary-teal) 0%, var(--primary-blue) 100%);
  --gradient-dark: linear-gradient(135deg, var(--primary-dark-blue) 0%, #0d3a5c 100%);
  
  /* Neutral Colors */
  --bg-light: #f8fafc;
  --bg-white: #ffffff;
  --bg-dark: #1e293b;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --text-white: #ffffff;
  
  /* Status Colors */
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --info: #3b82f6;
  
  /* Borders */
  --border-light: #e2e8f0;
  --border-medium: #cbd5e1;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 350ms ease;
}

/* ==========================================
   Reset & Base
   ========================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-light);
  min-height: 100vh;
}

a {
  color: var(--primary-blue);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--primary-dark-blue);
}

img {
  max-width: 100%;
  height: auto;
}

/* ==========================================
   Typography
   ========================================== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  color: var(--text-primary);
}

h1 { font-size: 2.25rem; }
h2 { font-size: 1.875rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }

/* ==========================================
   Layout Containers
   ========================================== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.container-sm { max-width: 640px; }
.container-md { max-width: 768px; }
.container-lg { max-width: 1024px; }

/* ==========================================
   Login Page
   ========================================== */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-dark);
  padding: var(--spacing-lg);
}

.login-container {
  width: 100%;
  max-width: 420px;
}

.login-card {
  background: var(--bg-white);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  box-shadow: var(--shadow-xl);
}

.login-logo {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.login-logo img {
  height: 60px;
  width: auto;
}

.login-title {
  text-align: center;
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
}

.login-subtitle {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
}

/* ==========================================
   App Layout (Dashboard)
   ========================================== */
.app-layout {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 260px;
  background: var(--gradient-dark);
  color: var(--text-white);
  display: flex;
  flex-direction: column;
  position: fixed;
  height: 100vh;
  z-index: 100;
  transition: transform var(--transition-normal);
}

.sidebar-header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-logo {
  height: 40px;
  width: auto;
}

.sidebar-nav {
  flex: 1;
  padding: var(--spacing-md) 0;
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  padding: var(--spacing-md) var(--spacing-lg);
  color: rgba(255, 255, 255, 0.7);
  transition: all var(--transition-fast);
  cursor: pointer;
  border-left: 3px solid transparent;
}

.nav-item:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-white);
}

.nav-item.active {
  background: rgba(255, 255, 255, 0.15);
  color: var(--text-white);
  border-left-color: var(--primary-teal);
}

.nav-item i {
  width: 24px;
  margin-right: var(--spacing-md);
  font-size: 1.1rem;
}

.sidebar-footer {
  padding: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.user-info {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.user-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--primary-teal);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
}

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

.user-name {
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-role {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.6);
  text-transform: capitalize;
}

/* Main Content */
.main-content {
  flex: 1;
  margin-left: 260px;
  padding: var(--spacing-xl);
  background: var(--bg-light);
  min-height: 100vh;
}

.page-header {
  margin-bottom: var(--spacing-xl);
}

.page-title {
  font-size: 1.75rem;
  margin-bottom: var(--spacing-xs);
}

.page-subtitle {
  color: var(--text-secondary);
}

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

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

.card-title {
  font-size: 1.125rem;
  font-weight: 600;
}

.card-body {
  padding: var(--spacing-lg);
}

.card-footer {
  padding: var(--spacing-lg);
  border-top: 1px solid var(--border-light);
  background: var(--bg-light);
}

/* Stats Cards */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.stat-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.stat-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.stat-icon.teal { background: rgba(61, 189, 184, 0.15); color: var(--primary-teal); }
.stat-icon.blue { background: rgba(43, 126, 193, 0.15); color: var(--primary-blue); }
.stat-icon.success { background: rgba(16, 185, 129, 0.15); color: var(--success); }
.stat-icon.warning { background: rgba(245, 158, 11, 0.15); color: var(--warning); }

.stat-details h3 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: var(--spacing-xs);
}

.stat-details p {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* ==========================================
   Forms
   ========================================== */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  font-weight: 500;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.form-label.required::after {
  content: ' *';
  color: var(--error);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--spacing-md);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  font-size: 1rem;
  color: var(--text-primary);
  background: var(--bg-white);
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 3px rgba(43, 126, 193, 0.15);
}

.form-input:disabled,
.form-select:disabled,
.form-textarea:disabled {
  background: var(--bg-light);
  cursor: not-allowed;
  opacity: 0.7;
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-hint {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: var(--spacing-xs);
}

.form-error {
  font-size: 0.875rem;
  color: var(--error);
  margin-top: var(--spacing-xs);
}

/* Form Section */
.form-section {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  margin-bottom: var(--spacing-lg);
  overflow: hidden;
}

.form-section-header {
  background: var(--bg-light);
  padding: var(--spacing-md) var(--spacing-lg);
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.form-section-title {
  font-size: 1rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.form-section-body {
  padding: var(--spacing-lg);
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
}

/* ==========================================
   Buttons
   ========================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--text-white);
}

.btn-primary:hover:not(:disabled) {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--bg-light);
  color: var(--text-primary);
  border: 1px solid var(--border-medium);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--border-light);
}

.btn-success {
  background: var(--success);
  color: var(--text-white);
}

.btn-success:hover:not(:disabled) {
  background: #059669;
}

.btn-danger {
  background: var(--error);
  color: var(--text-white);
}

.btn-danger:hover:not(:disabled) {
  background: #dc2626;
}

.btn-sm {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 0.875rem;
}

.btn-lg {
  padding: var(--spacing-lg) var(--spacing-xl);
  font-size: 1rem;
}

.btn-block {
  width: 100%;
}

.btn-icon {
  padding: var(--spacing-sm);
  width: 40px;
  height: 40px;
}

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

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

.table th,
.table td {
  padding: var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--border-light);
}

.table th {
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: var(--bg-light);
}

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

.table tbody tr:last-child td {
  border-bottom: none;
}

/* ==========================================
   Badges
   ========================================== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: var(--radius-full);
  text-transform: capitalize;
}

.badge-pending {
  background: rgba(245, 158, 11, 0.15);
  color: var(--warning);
}

.badge-approved {
  background: rgba(16, 185, 129, 0.15);
  color: var(--success);
}

.badge-rejected {
  background: rgba(239, 68, 68, 0.15);
  color: var(--error);
}

.badge-open {
  background: rgba(59, 130, 246, 0.15);
  color: var(--info);
}

.badge-answered {
  background: rgba(16, 185, 129, 0.15);
  color: var(--success);
}

.badge-admin {
  background: rgba(139, 92, 246, 0.15);
  color: #8b5cf6;
}

.badge-student {
  background: rgba(43, 126, 193, 0.15);
  color: var(--primary-blue);
}

/* ==========================================
   Modal
   ========================================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--bg-white);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow: hidden;
  transform: scale(0.9) translateY(20px);
  transition: transform var(--transition-normal);
}

.modal-overlay.active .modal {
  transform: scale(1) translateY(0);
}

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

.modal-title {
  font-size: 1.25rem;
  font-weight: 600;
}

.modal-close {
  width: 32px;
  height: 32px;
  border: none;
  background: none;
  cursor: pointer;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.modal-close:hover {
  background: var(--bg-light);
  color: var(--text-primary);
}

.modal-body {
  padding: var(--spacing-lg);
  overflow-y: auto;
  max-height: 60vh;
}

.modal-footer {
  padding: var(--spacing-lg);
  border-top: 1px solid var(--border-light);
  display: flex;
  gap: var(--spacing-md);
  justify-content: flex-end;
}

/* ==========================================
   Alerts
   ========================================== */
.alert {
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-lg);
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
}

.alert-success {
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #047857;
}

.alert-error {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #b91c1c;
}

.alert-warning {
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.3);
  color: #b45309;
}

.alert-info {
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.3);
  color: #1d4ed8;
}

/* ==========================================
   News Cards
   ========================================== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.news-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: all var(--transition-normal);
}

.news-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.news-card-image {
  width: 100%;
  height: 180px;
  object-fit: cover;
  background: var(--bg-light);
}

.news-card-body {
  padding: var(--spacing-lg);
}

.news-card-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-card-excerpt {
  color: var(--text-secondary);
  font-size: 0.875rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: var(--spacing-md);
}

.news-card-date {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ==========================================
   Appointment Calendar
   ========================================== */
.calendar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-lg);
}

.time-slots {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: var(--spacing-sm);
}

.time-slot {
  padding: var(--spacing-md);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.time-slot:hover:not(.disabled) {
  border-color: var(--primary-blue);
  background: rgba(43, 126, 193, 0.05);
}

.time-slot.selected {
  background: var(--primary-blue);
  color: var(--text-white);
  border-color: var(--primary-blue);
}

.time-slot.disabled {
  background: var(--bg-light);
  color: var(--text-muted);
  cursor: not-allowed;
}

/* ==========================================
   Tickets
   ========================================== */
.ticket-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.ticket-item {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.ticket-item:hover {
  border-color: var(--primary-blue);
}

.ticket-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: var(--spacing-sm);
}

.ticket-subject {
  font-weight: 600;
  font-size: 1rem;
}

.ticket-message {
  color: var(--text-secondary);
  font-size: 0.875rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.ticket-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-md);
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ==========================================
   Private Section (Mental Health)
   ========================================== */
.section-private {
  position: relative;
}

.section-private::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    45deg,
    transparent,
    transparent 10px,
    rgba(239, 68, 68, 0.03) 10px,
    rgba(239, 68, 68, 0.03) 20px
  );
  pointer-events: none;
  border-radius: var(--radius-lg);
}

.private-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 0.75rem;
  color: var(--error);
  background: rgba(239, 68, 68, 0.1);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
}

/* ==========================================
   Empty State
   ========================================== */
.empty-state {
  text-align: center;
  padding: var(--spacing-2xl);
}

.empty-state-icon {
  font-size: 3rem;
  color: var(--text-muted);
  margin-bottom: var(--spacing-lg);
}

.empty-state-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.empty-state-description {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
}

/* ==========================================
   Loading State
   ========================================== */
.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-light);
  border-top-color: var(--primary-blue);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(255, 255, 255, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
}

/* ==========================================
   Utility Classes
   ========================================== */
.hidden { display: none !important; }
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.text-center { text-align: center; }
.text-right { text-align: right; }

/* ==========================================
   Responsive Design
   ========================================== */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }
  
  .sidebar.open {
    transform: translateX(0);
  }
  
  .main-content {
    margin-left: 0;
    padding: var(--spacing-md);
  }
  
  .mobile-menu-btn {
    display: flex;
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .modal {
    max-width: calc(100% - 2rem);
    margin: var(--spacing-md);
  }
}

/* Mobile menu button */
.mobile-menu-btn {
  display: none;
  position: fixed;
  top: var(--spacing-md);
  left: var(--spacing-md);
  z-index: 101;
  width: 44px;
  height: 44px;
  background: var(--bg-white);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

@media (max-width: 768px) {
  .mobile-menu-btn {
    display: flex;
  }
}