/* ==========================================================================
   practice.css — Современный дизайн страницы "Сектор педагогической практики"
   Плавность, акценты, глубина.
   ========================================================================== */

/* ---------- 1. ПЕРЕМЕННЫЕ ---------- */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #eef2ff;
  --bg: #f8fafc;
  --surface: #ffffff;
  --text: #0f172a;
  --text-secondary: #475569;
  --border: #e2e8f0;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
  --shadow-lg: 0 20px 30px -10px rgba(0,0,0,0.08);
  --radius-sm: 10px;
  --radius-md: 20px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --font: 'Inter', system-ui, -apple-system, sans-serif;
}

.dark-mode {
  --bg: #0f172a;
  --surface: #1e293b;
  --text: #f1f5f9;
  --text-secondary: #cbd5e1;
  --border: #334155;
  --primary-light: #1e3a8a;
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 20px 30px -10px rgba(0,0,0,0.5);
}

/* ---------- 2. БАЗА ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font);
  background: linear-gradient(135deg, #f0f4ff 0%, #ffffff 100%);
  background-attachment: fixed;
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.dark-mode body {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
}

.main-content {
  padding: 2rem 1.5rem 4rem;
}

.page-section {
  max-width: 960px;
  margin: 0 auto;
}

/* ---------- 3. ЗАГОЛОВОК СТРАНИЦЫ ---------- */
.section-title {
  text-align: center;
  font-size: clamp(2.2rem, 5vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text);
  margin: 2rem 0 1.5rem;
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 70px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--primary-dark));
  border-radius: 2px;
  margin: 0.75rem auto 0;
}

/* ---------- 4. НАВИГАЦИЯ ---------- */
.section-nav {
  margin: 2.5rem 0 3rem;
  background: rgba(255,255,255,0.8);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  padding: 0.4rem;
  border: 1px solid var(--border);
}

.dark-mode .section-nav {
  background: rgba(30,41,59,0.8);
}

.section-nav__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.section-nav__item {
  flex: 1 1 auto;
}

.section-nav__link {
  display: block;
  text-align: center;
  padding: 0.8rem 1.2rem;
  text-decoration: none;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  white-space: nowrap;
  position: relative;
}

.section-nav__link:hover {
  color: var(--primary);
  background: var(--primary-light);
  transform: translateY(-1px);
}

.section-nav__link--active {
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  font-weight: 600;
  box-shadow: 0 4px 12px rgba(37,99,235,0.35);
}

/* ---------- 5. РАЗДЕЛЫ ---------- */
.subsection {
  margin-bottom: 3rem;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.35s ease, transform 0.35s ease;
}

.subsection.visible {
  opacity: 1;
  transform: translateY(0);
}

.subsection__title {
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 1.8rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.subsection__title::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 1.3em;
  background: linear-gradient(180deg, var(--primary), var(--primary-dark));
  border-radius: 3px;
}

/* ---------- 6. КАРТОЧКИ ---------- */
.info-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.8rem;
  margin-bottom: 2.5rem;
}

.info-card {
  background: var(--surface);
  border-radius: var(--radius-md);
  padding: 2rem;
  box-shadow: var(--shadow-md);
  transition: all var(--transition);
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(4px);
}

.info-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at top right, rgba(37,99,235,0.03), transparent 70%);
  pointer-events: none;
}

.info-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--primary-dark));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.info-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.info-card:hover::before {
  transform: scaleX(1);
}

.info-card__title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Иконки для карточек через псевдоэлемент (Font Awesome) */
.info-card__title::before {
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  font-size: 1.2rem;
  color: var(--primary);
}

.info-card:first-child .info-card__title::before {
  content: "\f007"; /* user */
}

.info-card:last-child .info-card__title::before {
  content: "\f0e0"; /* envelope */
}

.info-card__text {
  color: var(--text-secondary);
  line-height: 1.7;
  font-size: 1rem;
}

.info-card__text a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition);
}

.info-card__text a:hover {
  border-bottom-color: var(--primary);
}

/* ---------- 7. ИНФОРМАЦИОННЫЙ ТЕКСТ (с фоном) ---------- */
.info-text {
  background: var(--surface);
  border-radius: var(--radius-md);
  padding: 2rem 2.2rem;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  line-height: 1.8;
  font-size: 1.05rem;
  position: relative;
}

.info-text::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--primary), var(--primary-dark));
  border-radius: 4px 0 0 4px;
}

.info-text p {
  margin-bottom: 1.25rem;
  padding-left: 0.5rem;
}

.info-text ul {
  list-style: none;
  padding-left: 1.5rem;
  margin: 1rem 0 1.5rem;
}

.info-text ul li {
  position: relative;
  padding-left: 1.8rem;
  margin-bottom: 0.7rem;
}

.info-text ul li::before {
  content: '♪';
  position: absolute;
  left: 0;
  color: var(--primary);
  font-size: 1.1rem;
  font-weight: bold;
}

/* ---------- 8. ГРУППЫ ПРОГРАММ ---------- */
.program-group {
  margin-bottom: 2.5rem;
  background: var(--surface);
  border-radius: var(--radius-md);
  padding: 2rem;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
  transition: all var(--transition);
  position: relative;
}

.program-group:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.program-group__title {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.program-group__title::before {
  content: '';
  display: inline-block;
  width: 10px;
  height: 10px;
  background: var(--primary);
  border-radius: 50%;
  box-shadow: 0 0 0 3px var(--primary-light);
  flex-shrink: 0;
}

/* ---------- 9. АДАПТИВ ---------- */
@media (max-width: 768px) {
  .main-content {
    padding: 1.5rem 1rem 3rem;
  }

  .section-nav__list {
    flex-direction: column;
  }

  .section-nav__link {
    text-align: left;
    padding: 0.9rem 1.2rem;
  }

  .info-cards {
    grid-template-columns: 1fr;
  }

  .info-text {
    padding: 1.5rem;
  }

  .subsection__title {
    font-size: 1.4rem;
  }
}