/* ==========================================================================
   1. ГЛОБАЛЬНІ ЗМІННІ (ТЕМИ)
   ========================================================================== */

/* Світла тема (за замовчуванням) */
:root {
  --bg-main: #f8f9fa;
  --nav-bg: #ffffff;
  --nav-border: transparent;
  
  --card-bg: #ffffff;
  --card-border: rgba(0,0,0,0.1);
  --card-shadow: 0 4px 15px rgba(0,0,0,0.05);
  --card-shadow-hover: 0 8px 25px rgba(0,0,0,0.08);
  
  --text-main: #212529;
  --text-muted: #6c757d;
  
  --content-bg: #ffffff;
  --content-border: #dee2e6;
  
  --slogan-bg: rgba(13, 110, 253, 0.05);
  --slogan-border: #0d6efd;
  
  --placeholder-bg: #e9ecef;
  
  --footer-bg: #0b3273;
  --footer-border: transparent;
  --footer-text: rgba(255,255,255,0.8);
  --footer-text-hover: #ffffff;
  
  --social-icon-bg: rgba(255,255,255,0.1);
  --social-icon-color: #ffffff;
  
  --modal-footer-bg: #f8f9fa;
  --page-link-bg: #ffffff;
  --page-link-border: #dee2e6;
  
  /* Hero Section Variables */
  --hero-overlay: rgba(0, 0, 0, 0); 
  --hero-title-color: #0b3273; 
  --hero-subtitle-color: #212529; 
  --hero-text-shadow: 0 2px 10px rgba(255,255,255,0.8), 0 0 20px rgba(255,255,255,0.6); 
}

/* Темна тема */
[data-bs-theme="dark"] {
  --bg-main: #0d1117;
  --nav-bg: #010409;
  --nav-border: #30363d;
  
  --card-bg: #161b22;
  --card-border: #30363d;
  --card-shadow: 0 4px 15px rgba(0,0,0,0.2);
  --card-shadow-hover: 0 8px 25px rgba(0,0,0,0.4);
  
  --text-main: #c9d1d9;
  --text-muted: #8b949e;
  
  --content-bg: #161b22;
  --content-border: #30363d;
  
  --slogan-bg: rgba(88, 166, 255, 0.05);
  --slogan-border: #58a6ff;
  
  --placeholder-bg: #0d1117;
  
  --footer-bg: #010409;
  --footer-border: #30363d;
  --footer-text: #8b949e;
  --footer-text-hover: #c9d1d9;
  
  --social-icon-bg: #161b22;
  --social-icon-color: #c9d1d9;
  
  --modal-footer-bg: #0d1117;
  --page-link-bg: #0d1117;
  --page-link-border: #30363d;
  
  /* Hero Section Variables */
  --hero-overlay: rgba(0, 0, 0, 0.65); 
  --hero-title-color: #ffffff;
  --hero-subtitle-color: #e6e6e6;
  --hero-text-shadow: 0 4px 15px rgba(0, 0, 0, 0.9), 0 1px 3px rgba(0,0,0,0.6);
}

/* ==========================================================================
   2. БАЗОВІ СТИЛІ (BASE)
   ========================================================================== */

/* Глобальний фікс адаптиву (Зберігає роботу sticky-top та прибирає білу полосу) */
html, body {
  overflow-x: clip; 
  width: 100%;
  position: relative;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-main);
  color: var(--text-main);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  transition: background-color 0.3s ease, color 0.3s ease;
  display: flex;
  flex-direction: column;
  min-height: 100vh; /* Для притискання футера до низу */
  padding-top: env(safe-area-inset-top);
}

/* Preloader */
.preloader { background-color: var(--bg-main); position: fixed; top: 0; right: 0; bottom: 0; left: 0; z-index: 9999; }
.preloader__loader { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); }

/* ==========================================================================
   3. НАВІГАЦІЯ ТА HEADER
   ========================================================================== */

body > header {
  position: sticky;
  top: 0;
  z-index: 1050;
  background: var(--nav-bg);
}

.navbar {
  background-color: var(--nav-bg) !important;
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
}

.nav-link { 
  font-weight: 600; 
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-main) !important; 
  transition: color 0.2s; 
}

.nav-link:hover { color: #0d6efd !important; }

/* Перемикач теми */
.theme-toggle-btn {
  width: 40px; height: 40px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.2s;
}
header {
    padding-top: env(safe-area-inset-top);
}
/* ==========================================================================
   4. ГОЛОВНА СЕКЦІЯ (HERO)
   ========================================================================== */

.hero-section {
  background-color: #0b3273; /* Резервний колір */
  background-image: url('images/ds_banner.png'); /* ВАЖЛИВО: Відносний шлях для локал/хоста */
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  -webkit-background-size: cover;
  padding: 12rem 0;
  position: relative;
}

.hero-section::before {
  content: "";
  position: absolute;
  top: 0; left: 0; 
  width: 100%; height: 100%; 
  background: var(--hero-overlay); 
  z-index: 1;
  transition: background 0.3s ease;
}

.hero-section .container { position: relative; z-index: 2; }

.hero-title { 
  color: var(--hero-title-color);
  text-shadow: var(--hero-text-shadow);
  font-weight: 800; 
  font-size: clamp(2rem, 8vw, 4.5rem); 
  letter-spacing: 1px; 
  transition: color 0.3s ease, text-shadow 0.3s ease;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.hero-subtitle { 
  color: var(--hero-subtitle-color);
  text-shadow: var(--hero-text-shadow);
  font-weight: 600; 
  font-size: clamp(1rem, 4vw, 1.6rem); 
  letter-spacing: 1px; 
  line-height: 1.4; 
  transition: color 0.3s ease, text-shadow 0.3s ease;
}
.hero-subtitle {
    font-size: clamp(1rem, 4vw, 2rem);
    line-height: 1.4;
    word-break: normal;
    overflow-wrap: break-word;
}
@media (max-width: 767.98px) {
  .hero-section { padding: 6rem 0; background-position: center top; }
}

/* ==========================================================================
   5. КАРТКИ ТА ЕЛЕМЕНТИ ІНТЕРФЕЙСУ
   ========================================================================== */

/* Блоки переваг (Іконка + текст) */
.feature-box {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 1rem;
  padding: 1.5rem 1rem;
  box-shadow: var(--card-shadow);
  height: 100%;
  transition: transform 0.3s, border-color 0.3s, background-color 0.3s;
}
.feature-box:hover { transform: translateY(-5px); border-color: #0d6efd; }
.feature-icon { font-size: 2.5rem; color: #0d6efd; margin-bottom: 10px; }

/* Слоган */
.slogan-box {
  border-left: 4px solid var(--slogan-border);
  background: var(--slogan-bg);
  padding: 1.5rem;
  border-radius: 0 12px 12px 0;
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--text-main);
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Картки новин */
.news-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  box-shadow: var(--card-shadow);
  transition: box-shadow 0.3s, transform 0.3s, border-color 0.3s, background-color 0.3s;
  overflow: hidden;
}
.news-card:hover { box-shadow: var(--card-shadow-hover); transform: translateY(-2px); }
.news-card h3 { color: var(--text-main); }
.news-card p.text-secondary { color: var(--text-muted) !important; }

/* Картки викладачів */
.teacher-card {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  box-shadow: var(--card-shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}
.teacher-card:hover { transform: translateY(-5px); box-shadow: var(--card-shadow-hover); border-color: #0d6efd; }

/* Контейнери для внутрішніх сторінок (news_detail, info) */
.page-content-wrapper { 
  background-color: var(--content-bg); 
  border: 1px solid var(--content-border); 
  border-radius: 16px; 
  padding: 2rem; 
  box-shadow: var(--card-shadow); 
  margin-bottom: 2rem;
}
[data-bs-theme="dark"] .page-content-wrapper { box-shadow: 0 4px 20px rgba(0,0,0,0.2); }

.page-content img, .page-content iframe, .page-content video, .page-content table { 
  max-width: 100%; height: auto; border-radius: 8px; margin: 1rem 0; 
}
.page-content a { color: #0d6efd; text-decoration: none; }
.page-content a:hover { text-decoration: underline; }

/* ==========================================================================
   6. УТИЛІТИ (UTILITIES) ТА ФОРМИ
   ========================================================================== */

/* Обрізання тексту під фіксований розмір */
.text-truncate-multiline {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.title-truncate {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.page-title{
    color: var(--text-main);
    font-size: 2rem; /* 32px */
    font-weight: 700;
    letter-spacing: -0.02em;
    position: relative;
    padding-bottom: 10px;
}

.page-title::after{
    content: '';
    position: absolute;
    left: 50%;
    bottom: 0;
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background: var(--bs-primary);
    border-radius: 10px;
}
/* Форми (Select гуртків) */
.form-select { 
  background-color: var(--content-bg); 
  color: var(--text-main); 
  border-color: var(--content-border); 
}
.form-select:focus { border-color: #0d6efd; box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25); }

/* Модальне вікно */
.modal-content { background-color: var(--card-bg); border: 1px solid var(--card-border); }
.modal-header { border-bottom: 1px solid var(--card-border); }
.modal-footer { border-top: 1px solid var(--card-border); background-color: var(--modal-footer-bg); }
.modal-title, .modal-body p, .modal-body h3 { color: var(--text-main) !important; }

/* Пагінація */
.pagination .page-link { 
  background-color: var(--page-link-bg); 
  border-color: var(--page-link-border); 
  color: var(--text-main);
}
.pagination .page-item.active .page-link { background-color: #0d6efd; border-color: #0d6efd; color: #fff; }

/* Анімації (Fade in Up) */
.animate-up { opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease-out, transform 0.6s ease-out; }
.animate-up.active { opacity: 1; transform: translateY(0); }

/* ==========================================================================
   7. ФУТЕР (FOOTER)
   ========================================================================== */

.footer-dark { 
  background-color: var(--footer-bg); 
  border-top: 1px solid var(--footer-border); 
  color: var(--footer-text); 
  padding: 3rem 0 1rem; 
  transition: background-color 0.3s ease;
  overflow: hidden;
  margin-top: auto; /* Притискає футер до низу сторінки */
}

.footer-dark a { color: var(--footer-text); text-decoration: none; transition: color 0.2s; }
.footer-dark a:hover { color: var(--footer-text-hover); }
.footer-dark h5, .footer-dark .text-white { color: var(--footer-text-hover) !important; }

.social-icons a {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: 50%;
  background-color: var(--social-icon-bg); color: var(--social-icon-color); 
  transition: 0.3s; border: 1px solid var(--footer-border);
}
.social-icons a:hover { background-color: #0d6efd; color: #fff; border-color: #0d6efd; }


.schedule-card{
    border:1px solid var(--card-border);
    border-radius:16px;
    padding:20px;
    margin-bottom:20px;
    background:var(--card-bg);
    box-shadow:var(--card-shadow);
}

.schedule-card h3{
    margin-bottom:10px;
}

.schedule-time{
    display:inline-block;
    background:#0d6efd;
    color:white;
    padding:4px 10px;
    border-radius:999px;
    font-size:.85rem;
    margin:3px;
}

.schedule-section{display:none}
.schedule-section.active{display:block}
.schedule-tabs{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin:20px 0}
.schedule-btn{padding:10px 18px;border:none;border-radius:999px;background:#e9ecef;cursor:pointer}
.schedule-btn.active{background:#0d6efd;color:#fff}
.schedule-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}
.schedule-card{background:var(--card-bg);border:1px solid var(--card-border);border-radius:16px;padding:20px;box-shadow:var(--card-shadow)}
.schedule-card h3{margin-bottom:8px}
.schedule-coach{color:var(--text-muted);margin-bottom:12px}
.schedule-time{display:block;padding:6px 0;border-bottom:1px dashed rgba(0,0,0,.1)}