/* ==========================================================================
   LDHV — Liên Đoàn Hướng Việt Custom Theme
   Vietnamese Scouting colors: forest green, gold, warm earth tones
   ========================================================================== */

:root {
  --ldhv-green: #2e7d32;
  --ldhv-green-dark: #1b5e20;
  --ldhv-green-light: #4caf50;
  --ldhv-gold: #f9a825;
  --ldhv-gold-light: #fdd835;
  --ldhv-cream: #fffde7;
  --ldhv-brown: #5d4037;
  --ldhv-brown-light: #8d6e63;
  --ldhv-red: #c62828;
  --ldhv-text: #333333;
  --ldhv-bg: #fafafa;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  color: var(--ldhv-text);
  background-color: var(--ldhv-bg);
}

/* Guard against accidental horizontal overflow on small screens: no page-wide
   sideways scroll if a child (banner, sponsor image, embed) exceeds the viewport.
   Scoped to the x-axis only so vertical scrolling and sticky headers still work. */
html,
body {
  max-width: 100%;
  overflow-x: hidden;
}

/* Media never forces the layout wider than its column on mobile. */
img,
iframe {
  max-width: 100%;
}

/* --- Navbar --- */
.navbar-ldhv {
  background: linear-gradient(135deg, var(--ldhv-green-dark), var(--ldhv-green)) !important;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
  padding-top: 0.25rem;
  padding-bottom: 0.25rem;
}

.navbar-ldhv .navbar-brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--ldhv-gold) !important;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.navbar-ldhv .navbar-brand img {
  height: 40px;
  width: auto;
}

.navbar-ldhv .nav-link {
  color: rgba(255,255,255,0.9) !important;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}

.navbar-ldhv .nav-link:hover,
.navbar-ldhv .nav-link:focus {
  color: var(--ldhv-gold) !important;
}

.navbar-ldhv .dropdown-menu {
  border: none;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

/* --- Language toggle (segmented VI | EN) --- */
.lang-toggle {
  display: inline-flex;
  align-items: stretch;
  border: 1px solid rgba(255, 255, 255, 0.45);
  border-radius: 999px;
  overflow: hidden;
  margin-left: 0.5rem;
}

.lang-toggle-form {
  margin: 0;
  display: flex;
}

.lang-toggle-btn {
  border: 0;
  background: transparent;
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  line-height: 1;
  padding: 0.3rem 0.7rem;
  cursor: pointer;
  transition: background-color 0.2s, color 0.2s;
}

.lang-toggle-btn:hover:not(.active),
.lang-toggle-btn:focus-visible:not(.active) {
  color: var(--ldhv-gold);
  background: rgba(255, 255, 255, 0.12);
}

.lang-toggle-btn.active {
  background: var(--ldhv-gold);
  color: var(--ldhv-green-dark);
  cursor: default;
}

/* --- Hero / Carousel --- */
.hero-carousel .carousel-item img {
  width: 100%;
  max-height: 480px;
  object-fit: cover;
  border-radius: 0.5rem;
}

.hero-carousel .carousel-caption {
  background: rgba(0,0,0,0.5);
  border-radius: 0.5rem;
  padding: 0.75rem 1.25rem;
}

/* --- Section headings --- */
.section-title {
  color: var(--ldhv-green-dark);
  font-weight: 700;
  border-bottom: 3px solid var(--ldhv-gold);
  padding-bottom: 0.5rem;
  margin-bottom: 1.5rem;
}

/* --- Cards --- */
.card-ldhv {
  border: none;
  border-radius: 0.75rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  transition: transform 0.2s, box-shadow 0.2s;
}

.card-ldhv:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.12);
}

.card-ldhv .card-header {
  background: var(--ldhv-green);
  color: #fff;
  font-weight: 600;
  border-radius: 0.75rem 0.75rem 0 0 !important;
}

/* --- Announcement cards --- */
.announcement-card .card {
  border-left: 4px solid var(--ldhv-gold);
}

/* --- Unit cards --- */
.unit-card {
  border-top: 4px solid var(--ldhv-green);
}

.unit-card .badge-bay {
  background-color: var(--ldhv-gold);
  color: var(--ldhv-brown);
}

.unit-card .badge-thieu {
  background-color: var(--ldhv-green);
  color: #fff;
}

.unit-card .badge-thanh {
  background-color: var(--ldhv-red);
  color: #fff;
}

/* --- Welcome banner --- */
.welcome-banner {
  background: linear-gradient(135deg, var(--ldhv-green-dark), var(--ldhv-green));
  color: #fff;
  border-radius: 0.75rem;
  padding: 2rem;
  margin-bottom: 2rem;
}

.welcome-banner h1 {
  color: var(--ldhv-gold);
  font-weight: 700;
}

.welcome-banner .lead {
  color: rgba(255,255,255,0.9);
}

.welcome-banner-img-wrap {
  display: flex;
  justify-content: center;
}

.welcome-banner-img {
  max-width: 100%;
  height: auto;
  border-radius: 0.5rem;
}

/* --- Activity photo strip --- */
.activity-photo-strip {
  scrollbar-width: thin;
  scrollbar-color: var(--ldhv-green-light) transparent;
  justify-content: center;
}

.activity-photo-strip::-webkit-scrollbar {
  height: 6px;
}

.activity-photo-strip::-webkit-scrollbar-thumb {
  background: var(--ldhv-green-light);
  border-radius: 3px;
}

.activity-photo-item img {
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

.activity-photo-item img:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 14px rgba(0,0,0,0.2);
}

@media (max-width: 768px) {
  .activity-photo-strip {
    justify-content: flex-start;
  }
}

/* --- Footer --- */
.footer-ldhv {
  background: linear-gradient(135deg, var(--ldhv-green-dark), var(--ldhv-green)) !important;
  color: rgba(255,255,255,0.85);
}

.footer-ldhv a {
  color: var(--ldhv-gold);
  text-decoration: none;
}

.footer-ldhv a:hover {
  color: var(--ldhv-gold-light);
  text-decoration: underline;
}

/* --- Buttons --- */
.btn-ldhv {
  background-color: var(--ldhv-green);
  border-color: var(--ldhv-green);
  color: #fff;
}

.btn-ldhv:hover {
  background-color: var(--ldhv-green-dark);
  border-color: var(--ldhv-green-dark);
  color: #fff;
}

.btn-outline-ldhv {
  border-color: var(--ldhv-green);
  color: var(--ldhv-green);
}

.btn-outline-ldhv:hover {
  background-color: var(--ldhv-green);
  color: #fff;
}

/* --- Breadcrumbs --- */
.breadcrumb-item a {
  color: var(--ldhv-green);
}

/* --- Content pages --- */
.content-body img {
  max-width: 100%;
  height: auto;
  border-radius: 0.5rem;
  margin: 1rem 0;
}

.content-body h2 {
  color: var(--ldhv-green-dark);
  margin-top: 1.5rem;
}

.content-body h3 {
  color: var(--ldhv-brown);
}

/* --- Calendar tabs --- */
.nav-tabs .nav-link.active {
  color: var(--ldhv-green-dark);
  font-weight: 600;
  border-color: var(--ldhv-green) var(--ldhv-green) #fff;
}

/* --- Contact form --- */
.contact-form .form-control:focus {
  border-color: var(--ldhv-green);
  box-shadow: 0 0 0 0.2rem rgba(46,125,50,0.25);
}

/* --- News --- */
.news-date {
  color: var(--ldhv-brown-light);
  font-size: 0.875rem;
}

.news-unit-badge {
  background-color: var(--ldhv-green-light);
  color: #fff;
  font-size: 0.75rem;
}

/* --- Login button in nav --- */
.btn-login {
  border-color: var(--ldhv-gold) !important;
  color: var(--ldhv-gold) !important;
}

.btn-login:hover {
  background-color: var(--ldhv-gold) !important;
  color: var(--ldhv-green-dark) !important;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .welcome-banner {
    padding: 1.25rem;
  }
  .welcome-banner h1 {
    font-size: 1.5rem;
  }
  .hero-carousel .carousel-item img {
    max-height: 280px;
  }
}

/* --- Music pages --- */
.music-letter-bar .btn {
  min-width: 2rem;
  font-weight: 600;
}

.music-song-link {
  color: var(--ldhv-green-dark);
  text-decoration: none;
  font-size: 0.95rem;
  display: block;
  padding: 0.35rem 0;
  transition: color 0.15s;
}

.music-song-link:hover,
.music-song-link:focus {
  color: var(--ldhv-green-light);
  text-decoration: underline;
}

.music-song-link .bi {
  color: var(--ldhv-gold);
  margin-right: 0.25rem;
}

/* English title translation shown as tiny print under each song title. */
.music-song-title-en {
  font-size: 0.72rem;
  line-height: 1.1;
  margin-left: 1.1rem;
}

.song-player audio {
  max-width: 500px;
  border-radius: 0.5rem;
}

.song-lyrics .lyrics-body {
  background: var(--ldhv-cream);
  border-left: 4px solid var(--ldhv-gold);
  padding: 1.5rem 2rem;
  border-radius: 0 0.5rem 0.5rem 0;
  font-size: 1.05rem;
  line-height: 1.8;
}

/* --- Unit page tab navigation --- */
.unit-tab-link {
  color: var(--ldhv-text);
  font-weight: 500;
  border: none;
  padding: 0.65rem 1rem;
  transition: background-color 0.15s, color 0.15s;
}

.unit-tab-link:hover {
  background-color: var(--ldhv-cream);
  color: var(--ldhv-green-dark);
}

.unit-tab-link.active {
  background-color: var(--ldhv-green) !important;
  color: #fff !important;
  font-weight: 600;
}

.unit-tab-link .bi {
  margin-right: 0.4rem;
}

/* --- Unit tab content: constrain embedded images (badges, etc.) --- */
.unit-tab-content .richtext img {
  max-width: 120px;
  height: auto;
  margin: 0.5rem 1rem 0.5rem 0;
  border-radius: 0.25rem;
}

/* Row numbering via CSS counters — resets on sort */
table.sortable tbody { counter-reset: rownum; }
table.sortable tbody tr { counter-increment: rownum; }
table.sortable tbody tr td.row-num::before { content: counter(rownum); }
.attendance-table tbody { counter-reset: rownum; }
.attendance-table tbody tr { counter-increment: rownum; }
.attendance-table tbody tr td.row-num::before { content: counter(rownum); }