/* ========================================
   Latvian Learning Dashboard - Base Styles
   ======================================== */

/* CSS Variables */
:root {
  --bg: #f8f9fa;
  --card-bg: #ffffff;
  --text: #212529;
  --text-muted: #6c757d;
  --primary: #0d6efd;
  --success: #198754;
  --warning: #ffc107;
  --danger: #dc3545;
  --border: #dee2e6;
  --current-bg: #e7f1ff;
}

/* Global Styles */
* {
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
}

/* Typography */
h1 {
  margin: 0 0 0.5rem 0;
  font-size: 1.75rem;
}

.subtitle {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

/* Navbar */
.navbar {
  background: var(--card-bg);
  padding: 1rem 1.5rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.nav-brand {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--primary);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary);
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem 2rem;
}

/* Cards */
.card {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 1.25rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  margin-bottom: 1rem;
}

.card-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 1rem;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.card.wide {
  grid-column: span 2;
}

/* Buttons */
.btn {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 8px;
  font-weight: 500;
  cursor: pointer;
  font-size: 0.875rem;
  transition: all 0.2s;
  text-decoration: none;
  display: inline-block;
  text-align: center;
}

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

.btn-primary:hover {
  background: #0b5ed7;
}

.btn-primary:disabled {
  background: var(--border);
  cursor: not-allowed;
}

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

.btn-secondary:hover {
  background: #c4c9ce;
}

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

.btn-success:hover {
  background: #157347;
}

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

.btn-warning:hover {
  background: #ffcd39;
}

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

.btn-danger:hover {
  background: #bb2d3b;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.8rem;
}

/* Form Elements */
.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.5rem;
  font-size: 0.875rem;
}

.form-group textarea,
.form-group input,
.form-group select {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: inherit;
  font-size: 0.875rem;
}

.form-group textarea {
  min-height: 150px;
  resize: vertical;
  font-family: 'Courier New', monospace;
}

.form-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* Progress Bars */
.progress-bar {
  height: 8px;
  background: var(--border);
  border-radius: 4px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.3s ease;
}

.progress-fill.green {
  background: var(--success);
}

.progress-fill.blue {
  background: var(--primary);
}

.progress-fill.yellow {
  background: var(--warning);
}

/* Badges */
.badge {
  font-size: 0.7rem;
  padding: 0.2rem 0.5rem;
  border-radius: 10px;
  font-weight: 500;
}

.badge-success {
  background: #d1fae5;
  color: #065f46;
}

.badge-warning {
  background: #fef3c7;
  color: #92400e;
}

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

.badge-danger {
  background: #fee2e2;
  color: #991b1b;
}

/* Tabs */
.tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  border-bottom: 2px solid var(--border);
}

.tab-btn {
  padding: 0.75rem 1.5rem;
  background: none;
  border: none;
  border-bottom: 3px solid transparent;
  cursor: pointer;
  font-weight: 500;
  color: var(--text-muted);
  transition: all 0.2s;
  margin-bottom: -2px;
}

.tab-btn:hover {
  color: var(--primary);
}

.tab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.tab-content {
  display: none;
}

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

/* Alerts */
.alert {
  padding: 1rem;
  border-radius: 8px;
  margin-bottom: 1rem;
}

.alert-info {
  background: #cfe2ff;
  color: #084298;
  border: 1px solid #b6d4fe;
}

.alert-warning {
  background: #fff3cd;
  color: #664d03;
  border: 1px solid #ffecb5;
}

.alert-success {
  background: #d1e7dd;
  color: #0f5132;
  border: 1px solid #badbcc;
}

.alert-danger {
  background: #f8d7da;
  color: #842029;
  border: 1px solid #f5c2c7;
}

/* Utility Classes */
.text-muted {
  color: var(--text-muted);
}

.text-center {
  text-align: center;
}

.mb-0 {
  margin-bottom: 0;
}

.mb-1 {
  margin-bottom: 0.5rem;
}

.mb-2 {
  margin-bottom: 1rem;
}

.mb-3 {
  margin-bottom: 1.5rem;
}

.mt-1 {
  margin-top: 0.5rem;
}

.mt-2 {
  margin-top: 1rem;
}

.mt-3 {
  margin-top: 1.5rem;
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .navbar {
    flex-wrap: wrap;
    padding: 0.75rem 1rem;
  }

  .nav-brand {
    font-size: 1.1rem;
  }

  .nav-links {
    gap: 0.75rem;
    font-size: 0.875rem;
    flex-wrap: wrap;
    justify-content: center;
    width: 100%;
    margin-top: 0.5rem;
    padding-top: 0.5rem;
    border-top: 1px solid var(--border);
  }

  .nav-links a {
    padding: 0.25rem 0.5rem;
  }

  .container {
    padding: 0 1rem 1.5rem;
  }

  h1 {
    font-size: 1.5rem;
  }

  .card {
    padding: 1rem;
  }

  .card.wide {
    grid-column: span 1;
  }

  .btn {
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
  }
}

@media (max-width: 375px) {
  h1 {
    font-size: 1.25rem;
  }

  .nav-links {
    gap: 0.5rem;
    font-size: 0.8rem;
  }

  .container {
    padding: 0 0.75rem 1rem;
  }
}