/* ==============================
   1. CSS Variables (Theme)
============================== */
:root {
  /* Primary Color Palette */
  --color-primary: #4f46e5;
  --color-primary-dark: #3730a3;
  --color-primary-light: #6366f1;
  
  /* Secondary Colors */
  --color-secondary: #6b7280;
  --color-secondary-dark: #4b5563;
  --color-secondary-light: #9ca3af;
  
  /* Status Colors */
  --color-success: #10b981;
  --color-success-dark: #059669;
  --color-danger: #ef4444;
  --color-danger-dark: #dc2626;
  --color-warning: #f59e0b;
  --color-warning-dark: #d97706;
  --color-info: #3b82f6;
  --color-info-dark: #2563eb;
  
  /* Neutral Colors */
  --color-light: #f9fafb;
  --color-dark: #111827;
  --color-white: #fff;
  
  /* Gray Scale (consistent with Bootstrap) */
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;
  
  /* Background Colors */
  --bg-primary: var(--color-primary);
  --bg-secondary: var(--color-secondary);
  --bg-light: var(--color-light);
  --bg-dark: var(--color-dark);
  --bg-white: var(--color-white);
  
  /* Login/Auth specific (using consistent theme colors) */
  --auth-bg-start: var(--color-gray-800);
  --auth-bg-end: var(--color-gray-600);
  --auth-card-border-radius: 15px;

  /* Typography */
  --font-base: "Inter", sans-serif;
  --font-heading: "Inter", sans-serif;
  --line-height-base: 1.5;
  --line-height-heading: 1.2;

  /* Spacing */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;

  /* Border radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.15);
  
  /* Specific sizes for components */
  --profile-image-size: 220px;
  --profile-thumbnail-size: 44px;
  
  /* Calendar Event Colors */
  --calendar-event-holiday-color: var(--color-info);
  --calendar-event-absence-color: var(--color-success);
  --calendar-event-meeting-color: var(--color-warning);
  --calendar-event-deadline-color: var(--color-danger);
}

/* ==============================
     2. Typography
  ============================== */
body {
  font-family: var(--font-base);
  line-height: var(--line-height-base);
  color: var(--color-dark);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  line-height: var(--line-height-heading);
  font-weight: 600;
}

/* ==============================
     3. Buttons
  ============================== */
.btn {
  border-radius: var(--radius-md);
  font-weight: 600;
  padding: var(--space-1) var(--space-2);
  transition: all 0.2s;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  border: none;
}

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

.btn-primary:hover {
  background-color: #3730a3; /* slightly darker */
}

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

.btn-secondary:hover {
  background-color: #4b5563;
}

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

.btn-success:hover {
  background-color: #059669;
}

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

.btn-danger:hover {
  background-color: #dc2626;
}

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

.btn-outline-secondary:hover {
  background-color: var(--color-secondary);
  color: var(--color-white);
  border-color: var(--color-secondary);
}

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

.btn-outline-danger:hover {
  background-color: var(--color-danger);
  color: var(--color-white);
  border-color: var(--color-danger);
}

/* ==============================
     4. Modals
  ============================== */
.modal-content {
  border-radius: var(--radius-md);
  padding: var(--space-3);
  background-color: var(--color-light);
  color: var(--color-dark);
  box-shadow: var(--shadow-md);
}

.modal-header,
.modal-footer {
  border: none;
}

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

/* ==============================
     5. Forms
  ============================== */
.form-control {
  border-radius: var(--radius-md);
  border: 1px solid #d1d5db;
  padding: var(--space-1) var(--space-2);
  transition: border-color 0.2s, box-shadow 0.2s;
  font-family: var(--font-base);
}

.form-control:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 0.2rem rgba(79, 70, 229, 0.25);
  outline: none;
}

/* ==============================
     6. Cards
  ============================== */
.card {
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  padding: var(--space-3);
  background-color: var(--color-light);
  color: var(--color-dark);
}

/* ==============================
     7. Alerts
  ============================== */
.alert {
  border-radius: var(--radius-md);
  padding: var(--space-2);
  margin-bottom: var(--space-2);
  font-weight: 500;
}

.alert-success {
  background-color: #d1fae5;
  color: var(--color-success);
}
.alert-danger {
  background-color: #fee2e2;
  color: var(--color-danger);
}
.alert-warning {
  background-color: #fef3c7;
  color: var(--color-warning);
}
.alert-info {
  background-color: #dbeafe;
  color: var(--color-info);
}

/* ==============================
     8. Spacing Utilities
  ============================== */
.m-1 {
  margin: var(--space-1) !important;
}
.m-2 {
  margin: var(--space-2) !important;
}
.m-3 {
  margin: var(--space-3) !important;
}
.m-4 {
  margin: var(--space-4) !important;
}

.p-1 {
  padding: var(--space-1) !important;
}
.p-2 {
  padding: var(--space-2) !important;
}
.p-3 {
  padding: var(--space-3) !important;
}
.p-4 {
  padding: var(--space-4) !important;
}

/* ==============================
     9. Shadows & Borders Utilities
  ============================== */
.shadow-sm {
  box-shadow: var(--shadow-sm) !important;
}
.shadow-md {
  box-shadow: var(--shadow-md) !important;
}
.shadow-lg {
  box-shadow: var(--shadow-lg) !important;
}

.rounded-sm {
  border-radius: var(--radius-sm) !important;
}
.rounded-md {
  border-radius: var(--radius-md) !important;
}
.rounded-lg {
  border-radius: var(--radius-lg) !important;
}