/* public/css/course-detail.css — Light redesign */

/* ── Переменные ──────────────────────────────────────────────── */
:root {
  --blue:        #2563eb;
  --blue-light:  #eff6ff;
  --blue-mid:    #bfdbfe;
  --blue-dark:   #1d4ed8;
  --green:       #16a34a;
  --green-light: #f0fdf4;
  --green-mid:   #bbf7d0;
  --gray:        #64748b;
  --gray-light:  #f1f5f9;
  --text-head:   #0f172a;
  --text-body:   #334155;
  --text-muted:  #64748b;
  --surface:     #ffffff;
  --surface-2:   #f8fafc;
  --border:      #e2e8f0;
  --shadow-sm:   0 1px 3px rgba(0,0,0,.07), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md:   0 4px 16px rgba(0,0,0,.08);
  --shadow-lg:   0 12px 32px rgba(0,0,0,.11);
  --radius-sm:   8px;
  --radius-md:   14px;
  --radius-lg:   20px;
  --navbar-h:    64px;
  --t:           0.22s ease;
}

/* ── Базовые стили ───────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--surface-2);
  color: var(--text-body);
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

/* ── Layout ──────────────────────────────────────────────────── */
.page-container {
  min-height: calc(100vh - var(--navbar-h));
  padding-bottom: 5rem;
}

.container {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ── Hero-баннер курса ───────────────────────────────────────── */
.course-media {
  position: relative;
  height: 340px;
  overflow: hidden;
  background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 100%);
}

.course-image.img-cover {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform .6s ease;
  opacity: .85;
}

.course-media:hover .course-image.img-cover {
  transform: scale(1.03);
}

/* Оверлей со статистикой */
.course-stats {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(15,23,42,.85) 0%, transparent 100%);
  padding: 2rem 2rem 1.5rem;
  display: flex;
  gap: 2rem;
  align-items: flex-end;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .2rem;
  color: #fff;
}

.stat-item i {
  font-size: 1.25rem;
  color: var(--blue-mid);
}

.stat-item span {
  font-size: .85rem;
  font-weight: 600;
  white-space: nowrap;
}

/* ── course-detail обёртка ───────────────────────────────────── */
.course-detail {
  max-width: 860px;
  margin: 0 auto;
}

/* ── Информационный блок ─────────────────────────────────────── */
.grid-container {
  display: flex !important;
  flex-direction: column !important;
  gap: 1.5rem;
  margin: 0 auto 2rem;
  width: 100%;
  max-width: 860px;
  padding: 0 1.5rem;
}

.course-info {
  background: var(--surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  padding: 2rem;
  width: 100%;
}

.course-title {
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 800;
  color: var(--text-head);
  margin: 0 0 .6rem;
  line-height: 1.25;
  letter-spacing: -.02em;
}

.course-description {
  font-size: .975rem;
  color: var(--text-body);
  line-height: 1.7;
  margin: 0 0 1.5rem;
  white-space: pre-wrap;
  word-break: break-word;
  background: none;
  border: none;
  padding: 0;
  font-family: inherit;
  max-width: 100%;
  display: block;
}

/* Содержание курса */
.course-content-section {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.content-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-head);
  margin: 0 0 1rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  font-size: .8rem;
  color: var(--text-muted);
}

.content-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: .5rem;
}

.content-item {
  display: flex;
  align-items: center;
  gap: .7rem;
  padding: .6rem .8rem;
  background: var(--surface-2);
  border-radius: var(--radius-sm);
  font-size: .9rem;
  color: var(--text-body);
  transition: background var(--t);
}

.content-item:hover { background: var(--blue-light); }
.content-item i { color: var(--green); flex-shrink: 0; }

/* ── Секция тестирования ─────────────────────────────────────── */
.course-testing-section {
  max-width: 860px;
  margin: 0 auto 2rem;
  padding: 0 1.5rem;
}

.section-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-head);
  margin: 0 0 1.25rem;
  display: flex;
  align-items: center;
  gap: .6rem;
}

.section-title i { color: var(--blue); }

/* Бейджи рядом с заголовком */
.badge {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  padding: .3rem .75rem;
  border-radius: 999px;
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .03em;
}

.bg-success { background: var(--green-light); color: var(--green); border: 1px solid var(--green-mid); }
.bg-warning  { background: #fffbeb; color: #92400e; border: 1px solid #fde68a; }
.ms-2        { margin-left: .5rem; }

/* ── Список тестов ───────────────────────────────────────────── */
.test-list-grid {
  display: flex;
  flex-direction: column;
  gap: .85rem;
}

/* ── Карточка теста ──────────────────────────────────────────── */
.test-card {
  background: var(--surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  border-left: 4px solid var(--border);
  overflow: hidden;
  transition: box-shadow var(--t), transform var(--t);
}

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

/* Статусы */
.test-completed { border-left-color: var(--green); }
.test-available { border-left-color: var(--blue); }
.test-locked    { border-left-color: #cbd5e1; }

/* Заголовок карточки */
.test-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  background: var(--surface);
  cursor: pointer;
  gap: .75rem;
  transition: background var(--t);
}

.test-card-header:hover { background: var(--surface-2); }

.test-completed .test-card-header { background: #f0fdf4; }
.test-available .test-card-header { background: var(--blue-light); }
.test-locked    .test-card-header { background: var(--surface-2); }

/* Заголовок теста */
.test-card-header h4 {
  margin: 0;
  font-size: .975rem;
  font-weight: 700;
  color: var(--text-head);
  display: flex;
  align-items: center;
  gap: .5rem;
  flex: 1;
  background: none;
  box-shadow: none;
  padding: 0;
  border-radius: 0;
}

.test-completed .test-card-header h4 { color: var(--green); }
.test-available .test-card-header h4 { color: var(--blue-dark); }
.test-locked    .test-card-header h4 { color: var(--text-muted); }

/* Контролы (бейдж + кнопка) */
.test-card-controls {
  display: flex;
  align-items: center;
  gap: .5rem;
  flex-shrink: 0;
}

/* Бейдж статуса */
.badge-success   { background: var(--green-light); color: var(--green);    border: 1px solid var(--green-mid); }
.badge-primary   { background: var(--blue-light);  color: var(--blue-dark); border: 1px solid var(--blue-mid); }
.badge-secondary { background: #f1f5f9; color: var(--text-muted); border: 1px solid var(--border); }

/* Кнопка разворачивания */
.toggle-card-btn {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1.5px solid var(--border);
  background: var(--surface);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background var(--t), color var(--t), transform var(--t);
  flex-shrink: 0;
}

.toggle-card-btn:hover {
  background: var(--blue-light);
  color: var(--blue);
  border-color: var(--blue-mid);
}

.toggle-card-btn i { transition: transform var(--t); font-size: .8rem; }
.test-card .toggle-card-btn i.fa-chevron-up { transform: rotate(180deg); }

/* Тело карточки */
.test-card-body {
  padding: 1.25rem;
  border-top: 1px solid var(--border);
  background: var(--surface);
}

.test-card.collapsed .test-card-body { display: none !important; }

/* Детали теста */
.test-details {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
  padding: .75rem 1rem;
  background: var(--surface-2);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.detail-item {
  display: flex;
  align-items: center;
  gap: .4rem;
  font-size: .875rem;
  color: var(--text-muted);
}

.detail-item i   { color: var(--blue); font-size: .9rem; }
.detail-item span { font-weight: 600; color: var(--text-body); }

/* Кнопки действий */
.test-buttons {
  display: flex;
  justify-content: center;
}

.test-action-group {
  display: flex;
  gap: .75rem;
  flex-wrap: wrap;
  justify-content: center;
}

/* Базовые кнопки */
.btn-sm {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .6rem 1.1rem;
  border-radius: var(--radius-sm);
  font-size: .875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--t);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--blue);
  color: #fff;
  border: none;
  box-shadow: 0 4px 12px rgba(37,99,235,.3);
}

.btn-primary:hover {
  background: var(--blue-dark);
  box-shadow: 0 6px 18px rgba(37,99,235,.35);
  transform: translateY(-1px);
  color: #fff;
}

.btn-outline-primary {
  background: var(--blue-light);
  color: var(--blue);
  border: 1.5px solid var(--blue-mid);
}

.btn-outline-primary:hover {
  background: var(--blue);
  color: #fff;
  border-color: var(--blue);
}

.w-100 { width: 100%; justify-content: center; }

/* Сообщение заблокированного теста */
.test-locked-message {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-size: .875rem;
  color: var(--text-muted);
  padding: .6rem .9rem;
  background: var(--surface-2);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.test-locked-message i { color: var(--blue); }
.test-locked-message a { color: var(--blue); font-weight: 600; }
.test-locked-message a:hover { text-decoration: underline; }

/* Кнопка "пульс" для активного теста */
@keyframes pulse-ring {
  0%   { box-shadow: 0 0 0 0   rgba(37,99,235,.4); }
  70%  { box-shadow: 0 0 0 8px rgba(37,99,235,0); }
  100% { box-shadow: 0 0 0 0   rgba(37,99,235,0); }
}
.animate-pulse { animation: pulse-ring 2s infinite; }

/* ── Алерты ──────────────────────────────────────────────────── */
.alerts-wrapper {
  position: fixed;
  top: calc(var(--navbar-h) + .75rem);
  right: 1rem;
  z-index: 1100;
  display: flex;
  flex-direction: column;
  gap: .5rem;
  max-width: 340px;
}

.alert {
  display: flex;
  align-items: flex-start;
  gap: .6rem;
  padding: .9rem 1.1rem;
  border-radius: var(--radius-sm);
  font-size: .875rem;
  box-shadow: var(--shadow-md);
  animation: slideIn .3s ease forwards;
}

.alert-success { background: var(--green-light); color: #166534; border: 1px solid var(--green-mid); }
.alert-danger  { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }
.alert-info    { background: var(--blue-light); color: #1e40af; border: 1px solid var(--blue-mid); }
.alert-warning { background: #fffbeb; color: #92400e; border: 1px solid #fde68a; }

.alert-close {
  margin-left: auto;
  background: none;
  border: none;
  cursor: pointer;
  color: inherit;
  opacity: .55;
  padding: 0;
  font-size: .8rem;
  flex-shrink: 0;
}
.alert-close:hover { opacity: 1; }

@keyframes slideIn {
  from { opacity: 0; transform: translateX(16px); }
  to   { opacity: 1; transform: translateX(0); }
}

.animate-fadeOut { animation: slideOut .3s ease forwards; }

@keyframes slideOut {
  from { opacity: 1; }
  to   { opacity: 0; transform: translateX(16px); }
}

/* ── Утилиты ─────────────────────────────────────────────────── */
.mt-4  { margin-top: 1.5rem; }
.mt-5  { margin-top: 3rem; }
.me-1  { margin-right: .25rem; }
.me-2  { margin-right: .5rem; }
.text-center { text-align: center; }
.text-dark   { color: var(--text-head); }

/* ── Адаптивность ────────────────────────────────────────────── */
@media (max-width: 640px) {
  .course-media { height: 220px; }

  .course-stats {
    gap: 1.25rem;
    padding: 1.5rem 1rem 1rem;
  }

  .grid-container,
  .course-testing-section { padding: 0 1rem; }

  .course-info { padding: 1.25rem; }

  .test-details { gap: 1rem; }

  .test-action-group { flex-direction: column; align-items: stretch; }
  .test-action-group .btn-sm { justify-content: center; }
}