/* ============================================
   MAIN STYLESHEET
   ============================================ */
@import url('https://fonts.googleapis.com/css2?family=Hind+Siliguri:wght@300;400;500;600;700&family=Noto+Serif+Bengali:wght@400;600;700&family=Inter:wght@300;400;500;600;700&display=swap');
@import 'variables.css';
@import 'animations.css';

/* ---- RESET & BASE ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-primary);
  background: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.7;
  transition: background var(--transition), color var(--transition);
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a  { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; font-family: inherit; }
input, textarea, select {
  font-family: inherit;
  outline: none;
}

/* ---- LAYOUT ---- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.section {
  padding: var(--space-3xl) 0;
}

.section-sm {
  padding: var(--space-2xl) 0;
}

.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-gap { gap: var(--space-md); }

/* ---- TYPOGRAPHY ---- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--text-primary);
  line-height: 1.3;
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); }
h4 { font-size: 1.2rem; }

p { color: var(--text-secondary); margin-bottom: var(--space-md); }
p:last-child { margin-bottom: 0; }

.text-primary  { color: var(--color-primary); }
.text-muted    { color: var(--text-muted); }
.text-center   { text-align: center; }
.text-sm       { font-size: 0.875rem; }

/* ---- SECTION HEADER ---- */
.section-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}
.section-header .subtitle {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-primary);
  background: rgba(26,122,74,0.1);
  padding: 4px 14px;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-sm);
}
.section-header h2 { margin-bottom: var(--space-md); }
.section-header p   { max-width: 560px; margin: 0 auto; }

.divider {
  width: 60px; height: 3px;
  background: var(--color-primary);
  margin: var(--space-md) auto 0;
  border-radius: 2px;
}

/* ---- BUTTONS ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 10px 24px;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  border: 2px solid transparent;
  transition: all var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: var(--color-primary);
  color: #fff; 
  border-color: var(--color-primary);
}
.btn-primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(26,122,74,0.3);
}
.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-outline:hover {
  background: var(--color-primary);
  color: #fff;
}
.btn-secondary {
  background: var(--color-secondary);
  color: #1a1a2e;
  border-color: var(--color-secondary);
}
.btn-sm { padding: 5px 16px; font-size: 0.8rem; }
.btn-lg { padding: 14px 32px; font-size: 1rem; }

/* ---- CARDS ---- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: all var(--transition);
}
.card:hover {
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}
.card-img {
  width: 100%; height: 200px;
  object-fit: cover;
}
.card-body { padding: var(--space-lg); }
.card-meta {
  display: flex; align-items: center; gap: var(--space-sm);
  font-size: 0.8rem; color: var(--text-muted);
  margin-bottom: var(--space-sm);
}
.card-title {
  font-size: 1.1rem; font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
}
.card-desc {
  font-size: 0.9rem; color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

/* ---- BADGE ---- */
.badge {
  display: inline-flex; align-items: center;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 0.75rem; font-weight: 600;
}
.badge-green  { background: rgba(26,122,74,0.15); color: var(--color-primary); }
.badge-yellow { background: rgba(244,168,0,0.15); color: #b07800; }
.badge-red    { background: rgba(230,57,70,0.15);  color: var(--color-accent); }

/* ---- NAVBAR ---- */
.navbar {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--navbar-height);
  background: var(--bg-navbar);
  padding-top: 5px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: all var(--transition);
}
.navbar.scrolled {
  box-shadow: var(--shadow-md);
  height: 51px;
}
.navbar-inner {
  height: 100%;
  display: flex; align-items: center; justify-content: space-between;
}
.navbar-brand {
  display: flex; align-items: center; gap: var(--space-sm);
  font-family: var(--font-heading); font-size: 1.3rem; font-weight: 700;
  color: var(--color-primary);
}
.navbar-brand img { height: 40px; width: auto; }
.navbar-nav {
  display: flex; align-items: center; gap: var(--space-xs);
}
.nav-link {
  padding: 4px 14px;
  font-size: 0.9rem; font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  position: relative;
}
.nav-link::after {
  content: '';
  position: absolute; bottom: 0; left: 50%; right: 50%;
  height: 2px; background: var(--color-primary);
  transition: all var(--transition);
}
.nav-link:hover, .nav-link.active {
  color: var(--color-primary);
}
.nav-link:hover::after, .nav-link.active::after {
  left: 14px; right: 14px;
}

.navbar-controls {
  display: flex; align-items: center; gap: var(--space-sm);
}
.icon-btn {
  display: flex; align-items: center; justify-content: center;
  width: 38px; height: 38px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color);
  background: var(--bg-surface);
  color: var(--text-secondary);
  font-size: 1rem;
  transition: all var(--transition);
}
.icon-btn:hover {
  background: var(--color-primary);
  color: #fff; border-color: var(--color-primary);
}

.lang-toggle {
  font-size: 0.78rem; font-weight: 700;
  padding: 6px 12px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color);
  background: var(--bg-surface);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition);
}
.lang-toggle:hover {
  background: var(--color-primary);
  color: #fff; border-color: var(--color-primary);
}

/* Mobile menu toggle */
.hamburger {
  display: none;
  flex-direction: column; gap: 5px;
  cursor: pointer; padding: 6px;
  background: var(--bg-surface);
  border: none;
}
.hamburger span {
  display: block; width: 18px; height: 2px;
  background: var(--text-primary);
  border-radius: 2px; transition: all var(--transition);
}
.hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* Mobile nav drawer */
.mobile-nav {
  position: fixed; top: var(--navbar-height); left: 0; right: 0;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-color);
  padding: var(--space-lg);
  transform: translateY(-100%);
  opacity: 0;
  transition: all 0.35s ease;
  z-index: 999;
  box-shadow: var(--shadow-lg);
}
.mobile-nav.open {
  transform: translateY(0);
  opacity: 1;
}
.mobile-nav .nav-link {
  display: block; padding: var(--space-sm) 0;
  font-size: 1.05rem; border-bottom: 1px solid var(--border-color);
}

/* ---- HERO ---- */
.hero {
  min-height: 100vh;
  display: flex; align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: var(--navbar-height);
}
.hero-bg {
  position: absolute; inset: 0;
  background: url('../images/hero-bg.jpg') center/cover no-repeat;
  z-index: 0;
}
.hero-overlay {
  position: absolute; inset: 0;
  background: var(--bg-overlay);
  z-index: 1;
}
.hero-content {
  position: relative; z-index: 2;
  color: #fff; max-width: 700px;
}
.hero-content .subtitle {
  display: inline-block;
  font-size: 0.8rem; letter-spacing: 2px; text-transform: uppercase;
  color: var(--color-secondary);
  margin-bottom: var(--space-md);
}
.hero-content h1 {
  color: #fff; margin-bottom: var(--space-lg);
  text-shadow: 0 2px 20px rgba(0,0,0,0.4);
}
.hero-content p {
  color: rgba(255,255,255,0.85); font-size: 1.1rem;
  margin-bottom: var(--space-xl);
}
.hero-actions { display: flex; gap: var(--space-md); flex-wrap: wrap; }

/* Scroll indicator */
.scroll-indicator {
  position: absolute; bottom: 30px; left: 50%;
  transform: translateX(-50%); z-index: 2;
  display: flex; flex-direction: column; align-items: center;
  gap: var(--space-sm); color: rgba(255,255,255,0.7);
  font-size: 0.75rem; letter-spacing: 1px;
  animation: pulse 2s infinite;
}
.scroll-indicator .arrow {
  width: 20px; height: 20px;
  border-right: 2px solid rgba(255,255,255,0.6);
  border-bottom: 2px solid rgba(255,255,255,0.6);
  transform: rotate(45deg);
}

/* ---- STATS ---- */
.stats-bar {
  background: var(--color-primary);
  padding: var(--space-xl) 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
  text-align: center;
}
.stat-item { color: #fff; }
.stat-item .number {
  font-size: 2.5rem; font-weight: 700;
  line-height: 1; display: block;
}
.stat-item .label { font-size: 0.85rem; opacity: 0.85; margin-top: 4px; }

/* ---- EVENT FILTER ---- */
.filter-bar {
  display: flex; gap: var(--space-sm); flex-wrap: wrap;
  margin-bottom: var(--space-xl);
}
.filter-btn {
  padding: 7px 18px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color);
  background: var(--bg-surface);
  color: var(--text-secondary);
  font-size: 0.85rem; font-weight: 500;
  transition: all var(--transition);
}
.filter-btn:hover, .filter-btn.active {
  background: var(--color-primary);
  color: #fff; border-color: var(--color-primary);
}

/* ---- GALLERY ---- */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-sm);
}
.gallery-item {
  position: relative; overflow: hidden;
  border-radius: var(--radius-sm);
  aspect-ratio: 1;
  cursor: pointer;
}
.gallery-item img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.gallery-item:hover img { transform: scale(1.08); }
.gallery-overlay {
  position: absolute; inset: 0;
  background: rgba(26,122,74,0.6);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; transition: opacity var(--transition);
  color: #fff; font-size: 1.5rem;
}
.gallery-item:hover .gallery-overlay { opacity: 1; }

/* Lightbox */
.lightbox {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.92);
  z-index: 2000;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; visibility: hidden;
  transition: all var(--transition);
}
.lightbox.open { opacity: 1; visibility: visible; }
.lightbox img {
  max-width: 90vw; max-height: 85vh;
  object-fit: contain;
  border-radius: var(--radius-sm);
}
.lightbox-close {
  position: absolute; top: 20px; right: 24px;
  font-size: 2rem; color: #fff; cursor: pointer;
  background: none; border: none; line-height: 1;
}

/* ---- COMMITTEE ---- */
.member-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  text-align: center;
  transition: all var(--transition);
}
.member-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}
.member-avatar {
  width: 90px; height: 90px;
  border-radius: 50%; object-fit: cover;
  margin: 0 auto var(--space-md);
  border: 3px solid var(--color-primary);
}
.member-name { font-weight: 600; font-size: 1rem; margin-bottom: 4px; }
.member-role { font-size: 0.8rem; color: var(--color-primary); font-weight: 500; }
.member-dept { font-size: 0.78rem; color: var(--text-muted); margin-top: 3px; }

/* ---- FORMS ---- */
.form-group { margin-bottom: var(--space-lg); }
.form-label {
  display: block; font-size: 0.875rem;
  font-weight: 500; color: var(--text-secondary);
  margin-bottom: var(--space-sm);
}
.form-control {
  width: 100%; padding: 10px 14px;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  color: var(--text-primary);
  font-size: 0.9rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-control:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(26,122,74,0.12);
}
.form-control.error { border-color: var(--color-accent); }
.form-error {
  font-size: 0.78rem; color: var(--color-accent);
  margin-top: 4px; display: none;
}
.form-error.show { display: block; }
textarea.form-control { resize: vertical; min-height: 120px; }

/* ---- BREADCRUMB ---- */
.breadcrumb {
  display: flex; align-items: center; gap: var(--space-sm);
  font-size: 0.85rem; color: var(--text-muted);
  padding: var(--space-lg) 0 var(--space-xs);
}
.breadcrumb a { color: var(--color-primary); }
.breadcrumb-sep { color: var(--text-muted); }

/* ---- PAGE HERO (inner pages) ---- */
.page-hero {
  background: var(--bg-surface-2);
  border-bottom: 1px solid var(--border-color);
  padding: calc(var(--navbar-height) + var(--space-2xl)) 0 var(--space-2xl);
  text-align: center;
}
.page-hero h1 { margin-bottom: var(--space-sm); }
.page-hero p  { font-size: 1.05rem; max-width: 500px; margin: 0 auto; }

/* ---- FOOTER ---- */
.footer {
  background: var(--bg-footer);
  color: var(--text-footer);
  padding: var(--space-3xl) 0 var(--space-xl);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}
.footer-brand { display: flex; align-items: center; gap: var(--space-sm); margin-bottom: var(--space-md); }
.footer-brand img { height: 38px; }
.footer-brand span { font-family: var(--font-heading); font-size: 1.1rem; font-weight: 700; color: #fff; }
.footer p { color: var(--text-footer); font-size: 0.88rem; }

.footer-col h4 {
  font-size: 0.85rem; font-weight: 700;
  letter-spacing: 1.5px; text-transform: uppercase;
  color: var(--color-secondary); margin-bottom: var(--space-md);
}
.footer-col ul li { margin-bottom: var(--space-sm); }
.footer-col ul li a {
  font-size: 0.88rem; color: var(--text-footer);
  transition: color var(--transition);
}
.footer-col ul li a:hover { color: #fff; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: var(--space-lg);
  display: flex; align-items: center; justify-content: space-between;
  font-size: 0.8rem; color: var(--text-footer);
  flex-wrap: wrap; gap: var(--space-md);
}

.social-links { display: flex; gap: var(--space-sm); }
.social-link {
  width: 34px; height: 34px; border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.2);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-footer); font-size: 0.9rem;
  transition: all var(--transition);
}
.social-link:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff; transform: translateY(-2px);
}

/* ---- NOTICE TICKER ---- */
.ticker {
  background: var(--color-secondary);
  padding: 8px 0; overflow: hidden;
}
.ticker-inner {
  display: flex; align-items: center;
}
.ticker-label {
  background: var(--color-primary);
  color: #fff; font-size: 0.75rem;
  font-weight: 700; padding: 2px 14px;
  white-space: nowrap; flex-shrink: 0;
  border-radius: var(--radius-full);
  margin-right: var(--space-lg);
}
.ticker-track {
  overflow: hidden; flex: 1;
}
.ticker-items {
  display: flex; gap: var(--space-2xl);
  animation: ticker 25s linear infinite;
  white-space: nowrap;
}
@keyframes ticker {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}
.ticker-item {
  font-size: 0.85rem; font-weight: 500; color: #1a1a2e;
}

/* ---- TOAST ---- */
.toast-container {
  position: fixed; bottom: 24px; right: 24px;
  z-index: 3000; display: flex; flex-direction: column; gap: var(--space-sm);
}
.toast {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-sm);
  padding: 12px 18px;
  box-shadow: var(--shadow-lg);
  min-width: 260px; max-width: 360px;
  animation: slideRight 0.3s ease;
  color: var(--text-primary); font-size: 0.875rem;
}
.toast.error  { border-left-color: var(--color-accent); }
.toast.warning{ border-left-color: var(--color-secondary); }

/* ---- BACK TO TOP ---- */
#back-to-top {
  position: fixed; bottom: 80px; right: 24px;
  width: 42px; height: 42px;
  background: var(--color-primary); color: #fff;
  border-radius: 50%; border: none;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; box-shadow: var(--shadow-md);
  opacity: 0; visibility: hidden;
  transition: all var(--transition); z-index: 500;
}
#back-to-top.show { opacity: 1; visibility: visible; }
#back-to-top:hover { background: var(--color-primary-dark); transform: translateY(-3px); }

/* ---- EMPTY STATE ---- */
.empty-state {
  text-align: center; padding: var(--space-3xl) 0;
  color: var(--text-muted);
}
.empty-state svg { width: 64px; height: 64px; margin: 0 auto var(--space-lg); opacity: 0.4; }
.empty-state h3 { margin-bottom: var(--space-sm); }

/* ---- PAGINATION ---- */
.pagination {
  display: flex; align-items: center; justify-content: center;
  gap: var(--space-sm); margin-top: var(--space-2xl);
}
.page-btn {
  width: 36px; height: 36px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background: var(--bg-surface);
  color: var(--text-secondary);
  font-size: 0.875rem;
  display: flex; align-items: center; justify-content: center;
  transition: all var(--transition);
}
.page-btn:hover, .page-btn.active {
  background: var(--color-primary);
  color: #fff; border-color: var(--color-primary);
}