/* ── БЕРФОРТ LMS — Styles ── */

:root {
  --primary: #1a56db;
  --primary-dark: #1e40af;
  --primary-light: #dbeafe;
  --success: #059669;
  --success-light: #d1fae5;
  --danger: #dc2626;
  --danger-light: #fee2e2;
  --warning: #d97706;
  --warning-light: #fef3c7;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-500: #6b7280;
  --gray-700: #374151;
  --gray-900: #111827;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  color: var(--gray-900);
  background: var(--gray-50);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ── Header ── */
.header {
  background: #fff;
  border-bottom: 1px solid var(--gray-200);
  padding: 12px 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  text-decoration: none;
  color: var(--gray-900);
  font-size: 1.25rem;
}

.logo strong {
  color: var(--primary);
}

.logo span {
  color: var(--gray-500);
  font-weight: 300;
}

.nav {
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav-link {
  text-decoration: none;
  color: var(--gray-700);
  font-size: 0.9rem;
  padding: 4px 8px;
  border-radius: 4px;
  transition: background 0.2s;
}

.nav-link:hover {
  background: var(--gray-100);
}

.nav-link.active {
  color: var(--primary);
  font-weight: 600;
}

.nav-user {
  font-size: 0.85rem;
  color: var(--gray-500);
}

/* ── Main ── */
.main {
  flex: 1;
  padding: 32px 0;
}

/* ── Footer ── */
.footer {
  background: var(--gray-900);
  color: var(--gray-300);
  padding: 24px 0;
  font-size: 0.8rem;
  text-align: center;
  margin-top: auto;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-sm {
  padding: 6px 14px;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 14px 28px;
  font-size: 1rem;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
}

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

.btn-success:hover {
  background: #047857;
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--gray-300);
  color: var(--gray-700);
}

.btn-outline:hover {
  background: var(--gray-100);
}

.btn-block {
  width: 100%;
}

/* ── Cards ── */
.card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.card-body {
  padding: 20px;
}

.card-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--gray-100);
  background: var(--gray-50);
}

/* ── Course Grid ── */
.course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.course-card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: box-shadow 0.2s, transform 0.2s;
}

.course-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.course-card-cover {
  height: 160px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 2rem;
  font-weight: 700;
}

.course-card-body {
  padding: 20px;
}

.course-card-body h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.course-card-body p {
  color: var(--gray-500);
  font-size: 0.85rem;
  margin-bottom: 12px;
}

.course-meta {
  display: flex;
  gap: 16px;
  font-size: 0.8rem;
  color: var(--gray-500);
}

.course-card-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--gray-100);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* ── Forms ── */
.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--gray-700);
  margin-bottom: 4px;
}

.form-control {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-size: 0.9rem;
  transition: border-color 0.2s;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

.form-check {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.85rem;
}

.form-check input[type="checkbox"] {
  margin-top: 3px;
}

/* ── Alerts ── */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius);
  margin-bottom: 16px;
  font-size: 0.9rem;
}

.alert-error {
  background: var(--danger-light);
  color: var(--danger);
  border: 1px solid #fca5a5;
}

.alert-success {
  background: var(--success-light);
  color: var(--success);
  border: 1px solid #6ee7b7;
}

.alert-warning {
  background: var(--warning-light);
  color: var(--warning);
  border: 1px solid #fcd34d;
}

/* ── Auth pages ── */
.auth-page {
  max-width: 440px;
  margin: 40px auto;
}

.auth-page h1 {
  font-size: 1.5rem;
  margin-bottom: 24px;
  text-align: center;
}

/* ── Lesson layout ── */
.lesson-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 24px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.lesson-sidebar {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
  height: fit-content;
  position: sticky;
  top: 80px;
}

.lesson-sidebar h3 {
  font-size: 0.9rem;
  color: var(--gray-500);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.sidebar-module {
  margin-bottom: 16px;
}

.sidebar-module-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 4px;
}

.sidebar-lesson {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  font-size: 0.8rem;
  text-decoration: none;
  color: var(--gray-700);
  border-radius: 4px;
  transition: background 0.2s;
}

.sidebar-lesson:hover {
  background: var(--gray-100);
}

.sidebar-lesson.active {
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 500;
}

.sidebar-lesson.completed::before {
  content: '\u2713';
  color: var(--success);
  font-weight: bold;
}

.lesson-content {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 32px;
}

.lesson-content h1 {
  font-size: 1.5rem;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--gray-200);
}

.lesson-content .content-body {
  font-size: 0.95rem;
  line-height: 1.8;
}

.lesson-content .content-body h2 {
  margin-top: 24px;
  margin-bottom: 12px;
}

.lesson-content .content-body p {
  margin-bottom: 12px;
}

.lesson-content .content-body ul,
.lesson-content .content-body ol {
  margin-bottom: 12px;
  padding-left: 24px;
}

.lesson-actions {
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--gray-200);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* ── Progress bar ── */
.progress-bar {
  height: 8px;
  background: var(--gray-200);
  border-radius: 4px;
  overflow: hidden;
  margin: 8px 0;
}

.progress-bar-fill {
  height: 100%;
  background: var(--primary);
  border-radius: 4px;
  transition: width 0.3s;
}

.progress-text {
  font-size: 0.8rem;
  color: var(--gray-500);
}

/* ── Test ── */
.test-page {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 20px;
}

.question-block {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  margin-bottom: 20px;
}

.question-block h3 {
  font-size: 1rem;
  margin-bottom: 16px;
}

.question-number {
  color: var(--primary);
  font-weight: 600;
}

.option-label {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  margin-bottom: 8px;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  font-size: 0.9rem;
}

.option-label:hover {
  border-color: var(--primary);
  background: var(--primary-light);
}

.option-label input {
  accent-color: var(--primary);
}

/* ── Cabinet ── */
.cabinet-header {
  margin-bottom: 32px;
}

.cabinet-header h1 {
  font-size: 1.5rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}

.stat-card {
  background: #fff;
  padding: 20px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  text-align: center;
}

.stat-card .stat-number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
}

.stat-card .stat-label {
  font-size: 0.85rem;
  color: var(--gray-500);
}

/* ── Badge ── */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 500;
}

.badge-active {
  background: var(--primary-light);
  color: var(--primary);
}

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

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

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

/* ── Responsive ── */
@media (max-width: 768px) {
  .lesson-layout {
    grid-template-columns: 1fr;
  }

  .lesson-sidebar {
    position: static;
  }

  .course-grid {
    grid-template-columns: 1fr;
  }

  .header-inner {
    flex-direction: column;
    gap: 12px;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }
}