/* =====================================================
   Urban Design Lab – Main Stylesheet
   Gachon University
   ===================================================== */

/* ── Variables ── */
:root {
  --green-dark:   #1a5c2a;
  --green-mid:    #2d7a40;
  --green-light:  #4a9e5e;
  --green-pale:   #e8f5ec;
  --dark-bg:      #0f1c14;
  --dark-card:    #172518;
  --text-dark:    #1a1a1a;
  --text-mid:     #4a4a4a;
  --text-light:   #f0f4f1;
  --border:       #dde8df;
  --radius:       10px;
  --shadow:       0 4px 24px rgba(0,0,0,0.10);
  --transition:   0.3s ease;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Noto Sans KR', 'Inter', sans-serif;
  color: var(--text-dark);
  line-height: 1.7;
  background: #fff;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { display: block; max-width: 100%; }

/* ── Navbar ── */
.navbar {
  position: fixed; top: 0; left: 0; width: 100%;
  background: rgba(15,28,20,0.96);
  backdrop-filter: blur(10px);
  z-index: 1000;
  border-bottom: 1px solid rgba(74,158,94,0.15);
  transition: background var(--transition);
}
.nav-container {
  max-width: 1200px; margin: 0 auto;
  padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.nav-logo {
  font-size: 1.4rem; font-weight: 700;
  color: #fff; letter-spacing: 0.02em;
}
.logo-accent { color: var(--green-light); }
.nav-links {
  display: flex; gap: 8px;
}
.nav-link {
  color: rgba(255,255,255,0.82);
  padding: 8px 14px;
  border-radius: 6px;
  font-size: 0.92rem; font-weight: 500;
  transition: color var(--transition), background var(--transition);
}
.nav-link:hover, .nav-link.active {
  color: #fff; background: rgba(74,158,94,0.2);
}
/* ── Google Translate Widget ── */
#google_translate_element {
  display: inline-block;
}
/* Hide Google branding & credit */
.goog-te-gadget { font-size: 0 !important; }
.goog-te-gadget .goog-te-combo {
  background: rgba(74,158,94,0.15);
  border: 1.5px solid rgba(74,158,94,0.6);
  color: #c8e6cf;
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 0.78rem;
  font-weight: 500;
  font-family: 'Inter', 'Noto Sans KR', sans-serif;
  cursor: pointer;
  transition: all 0.3s ease;
  outline: none;
  appearance: auto;
}
.goog-te-gadget .goog-te-combo:hover,
.goog-te-gadget .goog-te-combo:focus {
  background: rgba(74,158,94,0.3);
  border-color: var(--green-light);
  color: #fff;
}
.goog-te-gadget .goog-te-combo option {
  background: #172518;
  color: #e8f5ec;
}
/* Hide the Google Translate top bar */
.goog-te-banner-frame { display: none !important; }
body { top: 0 !important; }
/* Hide "Powered by Google" text */
.goog-te-gadget > span { display: none !important; }
.goog-logo-link { display: none !important; }
.hamburger {
  display: none;
  background: none; border: none; cursor: pointer;
  color: #fff; font-size: 1.3rem; padding: 6px;
}

/* ── Hero ── */
.hero {
  min-height: 100vh;
  background: linear-gradient(135deg, #0f2a18 0%, #1a5c2a 50%, #0a1a10 100%);
  display: flex; align-items: center; justify-content: center;
  position: relative; overflow: hidden;
  padding-top: 64px;
}
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background: url('https://images.unsplash.com/photo-1477959858617-67f85cf4f1df?w=1600&q=80') center/cover no-repeat;
  opacity: 0.18;
}
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to bottom, rgba(15,28,20,0.65), rgba(15,28,20,0.85));
}
.hero-content {
  position: relative; z-index: 1;
  text-align: center; color: #fff;
  max-width: 800px; padding: 40px 24px;
}
.hero-sub {
  font-size: 1rem; font-weight: 300;
  letter-spacing: 0.15em; color: var(--green-light);
  text-transform: uppercase; margin-bottom: 16px;
}
.hero-title {
  font-size: clamp(2.8rem, 7vw, 5rem);
  font-weight: 700; line-height: 1.1;
  margin-bottom: 20px; letter-spacing: -0.02em;
}
.hero-desc {
  font-size: 1.2rem; font-weight: 300;
  color: rgba(255,255,255,0.8); margin-bottom: 36px;
}
.hero-btns { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

.hero-visitor {
  margin-top: 36px;
  font-family: 'Raleway', 'Inter', sans-serif;
  font-size: 0.85rem;
  font-weight: 300;
  color: var(--green-light);
  letter-spacing: 0.18em;
}
.hero-visitor i {
  margin-right: 5px;
  font-size: 0.72rem;
}
.hero-visitor strong {
  color: var(--green-light);
  font-weight: 500;
  font-size: 0.95rem;
}

.fade-in {
  opacity: 0; transform: translateY(28px);
  animation: fadeInUp 0.8s forwards;
}
.fade-in:nth-child(1) { animation-delay: 0.2s; }
.fade-in:nth-child(2) { animation-delay: 0.4s; }
.fade-in:nth-child(3) { animation-delay: 0.6s; }
.fade-in:nth-child(4) { animation-delay: 0.8s; }

@keyframes fadeInUp {
  to { opacity: 1; transform: translateY(0); }
}

/* ── Buttons ── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 28px; border-radius: 50px;
  font-size: 0.95rem; font-weight: 600;
  cursor: pointer; transition: all var(--transition);
  border: 2px solid transparent;
}
.btn-primary {
  background: var(--green-mid); color: #fff;
  border-color: var(--green-mid);
}
.btn-primary:hover { background: var(--green-light); border-color: var(--green-light); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(45,122,64,0.4); }
.btn-outline {
  background: transparent; color: #fff;
  border-color: rgba(255,255,255,0.5);
}
.btn-outline:hover { background: rgba(255,255,255,0.1); border-color: #fff; transform: translateY(-2px); }
.btn-full { width: 100%; justify-content: center; }

/* ── Strip ── */
.strip {
  background: var(--green-dark); padding: 22px 24px;
}
.strip-grid {
  max-width: 900px; margin: 0 auto;
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
.strip-item {
  display: flex; align-items: center; gap: 10px;
  color: rgba(255,255,255,0.85);
  font-size: 0.88rem; font-weight: 500;
  justify-content: center;
}
.strip-item i { color: var(--green-light); font-size: 1.1rem; }

/* ── Sections ── */
.section { padding: 88px 24px; }
.section-light { background: #fff; }
.section-dark { background: var(--dark-bg); color: var(--text-light); }
.container { max-width: 1100px; margin: 0 auto; }
.section-header { text-align: center; margin-bottom: 52px; }
.section-title {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700; letter-spacing: -0.02em;
}
.section-dark .section-title { color: #fff; }
.section-line {
  width: 52px; height: 4px;
  background: var(--green-mid);
  border-radius: 2px; margin: 14px auto 0;
}
.section-count { margin-top: 10px; color: var(--text-mid); font-size: 0.95rem; }
.section-light .section-count { color: var(--text-mid); }

/* ── Professor ── */
.professor-card {
  display: flex; gap: 52px; align-items: flex-start;
  max-width: 900px; margin: 0 auto;
  background: #fff; border: 1px solid var(--border);
  border-radius: var(--radius); padding: 44px;
  box-shadow: var(--shadow);
}
.professor-photo { flex-shrink: 0; }
.professor-photo img {
  width: 160px; height: 160px;
  border-radius: 50%;
  border: 4px solid var(--green-mid);
  object-fit: cover;
}
.photo-placeholder {
  width: 160px; height: 160px;
  border-radius: 50%;
  background: var(--green-pale);
  border: 4px solid var(--green-mid);
  display: flex; align-items: center; justify-content: center;
}
.photo-placeholder i { font-size: 4rem; color: var(--green-mid); }
.professor-info { flex: 1; }
.prof-name { font-size: 1.8rem; font-weight: 700; margin-bottom: 4px; }
.prof-name-en { font-size: 1.1rem; color: var(--text-mid); font-weight: 400; margin-left: 10px; }
.prof-title { color: var(--text-mid); font-size: 0.97rem; margin-bottom: 8px; }
.prof-email { color: var(--green-dark); font-size: 0.92rem; margin-bottom: 22px; }
.prof-email i { margin-right: 6px; }
.prof-education h4 { font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--text-mid); margin-bottom: 8px; }
.prof-education ul { margin-bottom: 22px; }
.prof-education li {
  padding: 6px 0; border-bottom: 1px solid var(--border);
  display: flex; gap: 10px; font-size: 0.9rem; align-items: center;
}
.edu-year {
  font-weight: 700; color: var(--green-dark);
  min-width: 110px; font-size: 0.85rem;
}
.prof-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  background: var(--green-pale); color: var(--green-dark);
  padding: 5px 12px; border-radius: 50px;
  font-size: 0.82rem; font-weight: 500;
  border: 1px solid rgba(26,92,42,0.2);
}

/* ── Research ── */
.research-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}
.research-card {
  background: var(--dark-card);
  border: 1px solid rgba(74,158,94,0.15);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.research-card:hover {
  transform: translateY(-6px);
  border-color: var(--green-light);
  box-shadow: 0 12px 36px rgba(0,0,0,0.3);
}
.research-icon {
  width: 52px; height: 52px;
  background: rgba(74,158,94,0.12);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
}
.research-icon i { font-size: 1.4rem; color: var(--green-light); }
.research-card h3 { font-size: 1.1rem; font-weight: 600; color: #fff; margin-bottom: 10px; }
.research-card p { font-size: 0.88rem; color: rgba(255,255,255,0.65); line-height: 1.7; }

/* ── Publications ── */
.pub-filters {
  display: flex; flex-wrap: wrap; gap: 8px;
  justify-content: center; margin-bottom: 40px;
}
.filter-btn {
  padding: 8px 18px; border-radius: 50px;
  border: 2px solid var(--border);
  background: #fff; color: var(--text-mid);
  font-size: 0.88rem; font-weight: 500; cursor: pointer;
  transition: all var(--transition);
}
.filter-btn:hover { border-color: var(--green-mid); color: var(--green-dark); }
.filter-btn.active {
  background: var(--green-dark); color: #fff; border-color: var(--green-dark);
}

.pub-year-group { margin-bottom: 32px; }
.pub-year-group[data-year].hidden { display: none; }

.pub-year-label {
  display: inline-block;
  background: var(--green-dark); color: #fff;
  font-size: 0.85rem; font-weight: 700;
  padding: 4px 14px; border-radius: 50px;
  margin-bottom: 14px; letter-spacing: 0.05em;
}
.pub-item {
  background: #fff; border: 1px solid var(--border);
  border-left: 4px solid var(--green-mid);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 18px 22px; margin-bottom: 10px;
  transition: box-shadow var(--transition), transform var(--transition);
}
.pub-item:hover {
  box-shadow: var(--shadow); transform: translateX(4px);
}
.pub-meta { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.pub-badge {
  font-size: 0.72rem; font-weight: 700;
  padding: 3px 8px; border-radius: 4px;
}
.pub-badge-en { background: #e3f2fd; color: #1565c0; }
.pub-badge-kr { background: #fff3e0; color: #e65100; }
.pub-journal {
  font-size: 0.8rem; color: var(--green-dark);
  font-weight: 600; font-style: italic;
  background: var(--green-pale); padding: 2px 8px; border-radius: 4px;
}
.pub-title { font-size: 0.9rem; color: var(--text-dark); line-height: 1.6; font-weight: 400; }
.pub-clickable { cursor: pointer; transition: color 0.2s; }
.pub-clickable:hover { color: var(--green-mid); }
.pub-arrow { font-size: 0.7rem; margin-left: 6px; transition: transform 0.3s; color: #999; }
.pub-item.open .pub-arrow { transform: rotate(180deg); }
.pub-summary {
  max-height: 0; overflow: hidden; opacity: 0;
  transition: max-height 0.4s ease, opacity 0.3s ease, padding 0.3s ease;
  font-size: 0.85rem; color: #555; line-height: 1.7;
  padding: 0 0 0 0; margin: 0;
  border-left: 3px solid var(--green-light);
}
.pub-item.open .pub-summary {
  max-height: 200px; opacity: 1;
  padding: 10px 0 10px 14px; margin-top: 8px;
}

/* ── Members ── */
.member-tabs {
  display: flex; gap: 10px;
  margin-bottom: 36px;
  border-bottom: 2px solid rgba(74,158,94,0.2);
  padding-bottom: 0;
}
.tab-btn {
  padding: 12px 26px;
  border: none; background: none;
  color: rgba(255,255,255,0.55);
  font-size: 0.95rem; font-weight: 500; cursor: pointer;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  transition: all var(--transition);
  display: flex; align-items: center; gap: 8px;
}
.tab-btn:hover { color: rgba(255,255,255,0.85); }
.tab-btn.active { color: var(--green-light); border-bottom-color: var(--green-light); }

.tab-panel { display: none; }
.tab-panel.active { display: block; }

.member-group-label {
  font-size: 0.78rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.1em;
  color: var(--green-light); margin: 28px 0 14px;
}
.members-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}
.member-card {
  background: var(--dark-card);
  border: 1px solid rgba(74,158,94,0.15);
  border-radius: var(--radius); padding: 24px 18px;
  display: flex; flex-direction: column; align-items: center;
  text-align: center; gap: 12px;
  transition: border-color var(--transition), transform var(--transition);
}
.member-card:hover { border-color: var(--green-light); transform: translateY(-4px); }
.member-pi { border-top: 3px solid var(--green-light); }
.member-avatar {
  width: 64px; height: 64px; border-radius: 50%;
  background: rgba(74,158,94,0.12);
  display: flex; align-items: center; justify-content: center;
}
.member-avatar img { width: 100%; height: 100%; object-fit: cover; border-radius: 50%; }
.member-avatar:has(img) { width: 96px; height: 96px; }
.member-avatar i { font-size: 1.6rem; color: var(--green-light); }
.member-details h4 { font-size: 1rem; font-weight: 600; color: #fff; }
.member-role-badge {
  display: inline-block; margin: 4px 0;
  padding: 2px 10px; border-radius: 50px; font-size: 0.75rem; font-weight: 600;
}
.pi-badge { background: rgba(74,158,94,0.25); color: var(--green-light); }
.phd-badge { background: rgba(100,149,237,0.2); color: #93b4f0; }
.ms-badge { background: rgba(255,200,100,0.15); color: #f0c060; }
.member-topic { font-size: 0.8rem; color: rgba(255,255,255,0.55); line-height: 1.4; }

/* Recruit Banner */
.recruit-banner {
  margin-top: 32px;
  background: rgba(26,92,42,0.3);
  border: 1px dashed rgba(74,158,94,0.4);
  border-radius: var(--radius); padding: 20px 24px;
  display: flex; gap: 16px; align-items: flex-start;
  color: rgba(255,255,255,0.8);
}
.recruit-banner i { font-size: 1.4rem; color: var(--green-light); flex-shrink: 0; margin-top: 2px; }
.recruit-banner strong { font-size: 1rem; display: block; margin-bottom: 4px; color: #fff; }
.recruit-banner p { font-size: 0.85rem; }

/* ── Alumni ── */
.alumni-stats {
  display: flex; gap: 20px; justify-content: center;
  margin-bottom: 32px;
}
.stat-box {
  background: var(--dark-card);
  border: 1px solid rgba(74,158,94,0.2);
  border-radius: var(--radius); padding: 20px 32px;
  text-align: center; min-width: 100px;
}
.stat-num { display: block; font-size: 2rem; font-weight: 700; color: var(--green-light); }
.stat-label { font-size: 0.8rem; color: rgba(255,255,255,0.55); margin-top: 4px; }

.alumni-controls {
  display: flex; align-items: center; gap: 14px;
  flex-wrap: wrap; margin-bottom: 24px;
}
.alumni-filter-btns { display: flex; gap: 8px; }
.alumni-filter {
  padding: 7px 16px; border-radius: 50px;
  border: 2px solid rgba(74,158,94,0.3);
  background: transparent; color: rgba(255,255,255,0.6);
  font-size: 0.85rem; font-weight: 500; cursor: pointer;
  transition: all var(--transition);
}
.alumni-filter:hover { border-color: var(--green-light); color: #fff; }
.alumni-filter.active { background: var(--green-dark); color: #fff; border-color: var(--green-dark); }
.alumni-sort {
  padding: 7px 14px; border-radius: 8px;
  border: 1px solid rgba(74,158,94,0.3);
  background: var(--dark-card); color: rgba(255,255,255,0.7);
  font-size: 0.85rem; cursor: pointer;
}

.alumni-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
}
.alumni-card {
  background: var(--dark-card);
  border: 1px solid rgba(74,158,94,0.15);
  border-radius: var(--radius); padding: 22px 20px;
  display: flex; align-items: center; gap: 16px;
  transition: border-color var(--transition), transform var(--transition);
}
.alumni-card:hover { border-color: var(--green-light); transform: translateY(-3px); }
.alumni-card.hidden { display: none; }
.alumni-avatar {
  width: 52px; height: 52px; border-radius: 50%;
  background: rgba(74,158,94,0.1);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.alumni-avatar i { font-size: 1.3rem; color: var(--green-light); }
.alumni-info h4 { font-size: 0.97rem; font-weight: 600; color: #fff; margin-bottom: 4px; }
.alumni-degree-badge {
  display: inline-block; padding: 2px 8px; border-radius: 4px;
  font-size: 0.73rem; font-weight: 700; margin-bottom: 4px;
}
.degree-phd { background: rgba(100,149,237,0.2); color: #93b4f0; }
.degree-ms { background: rgba(255,200,100,0.15); color: #f0c060; }
.alumni-year { font-size: 0.78rem; color: rgba(255,255,255,0.45); }
.alumni-thesis { font-size: 0.78rem; color: rgba(255,255,255,0.5); margin-top: 5px; line-height: 1.4; }
.alumni-thesis i { margin-right: 5px; color: var(--green-light); }
.alumni-affiliation { font-size: 0.8rem; color: rgba(255,255,255,0.55); margin-top: 3px; }
.alumni-affiliation i { margin-right: 5px; color: var(--green-light); }

/* ── Contact ── */
.contact-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 48px; align-items: start;
}
.contact-info h3, .contact-form h3 {
  font-size: 1.3rem; font-weight: 600;
  margin-bottom: 22px; color: var(--green-dark);
}
.contact-list { display: flex; flex-direction: column; gap: 14px; }
.contact-list li {
  display: flex; gap: 14px; align-items: flex-start;
  font-size: 0.93rem; color: var(--text-mid);
}
.contact-list i { color: var(--green-mid); margin-top: 3px; flex-shrink: 0; }

.form-group { margin-bottom: 18px; }
.form-group label {
  display: block; font-size: 0.85rem; font-weight: 600;
  color: var(--text-mid); margin-bottom: 6px;
}
.form-group input,
.form-group textarea {
  width: 100%; padding: 11px 14px;
  border: 1.5px solid var(--border); border-radius: 8px;
  font-size: 0.92rem; font-family: inherit;
  transition: border-color var(--transition), box-shadow var(--transition);
  background: #fafaf9;
}
.form-group input:focus,
.form-group textarea:focus {
  outline: none; border-color: var(--green-mid);
  box-shadow: 0 0 0 3px rgba(45,122,64,0.12);
}

/* ── Gallery Page ── */
.gallery-hero {
  position: relative; height: 320px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--dark-bg) 0%, #1a3d24 100%);
  overflow: hidden;
}
.gallery-hero .hero-overlay {
  position: absolute; inset: 0;
  background: rgba(15,28,20,0.55);
}
.gallery-hero .hero-content { position: relative; text-align: center; }
.gallery-hero .hero-title { font-size: 2.6rem; color: #fff; }
.gallery-hero .hero-desc { color: rgba(255,255,255,0.7); margin-top: 10px; font-size: 1rem; }

.gallery-upload-guide {
  display: flex; align-items: center; gap: 16px;
  background: var(--green-pale); border: 1px solid rgba(45,122,64,0.2);
  border-radius: var(--radius); padding: 18px 24px; margin-bottom: 32px;
}
.gallery-upload-guide i { font-size: 1.6rem; color: var(--green-mid); flex-shrink: 0; }
.gallery-upload-guide strong { color: var(--green-dark); }
.gallery-upload-guide p { font-size: 0.88rem; color: var(--text-mid); margin-top: 2px; }
.gallery-upload-guide code {
  background: rgba(45,122,64,0.12); padding: 2px 8px;
  border-radius: 4px; font-size: 0.84rem; color: var(--green-dark);
}

.gallery-filters {
  display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 28px;
}
.gallery-filter-btn {
  padding: 8px 20px; border: 1.5px solid var(--border);
  border-radius: 20px; background: #fff;
  font-size: 0.88rem; font-family: inherit; cursor: pointer;
  color: var(--text-mid); transition: all var(--transition);
}
.gallery-filter-btn:hover { border-color: var(--green-mid); color: var(--green-mid); }
.gallery-filter-btn.active {
  background: var(--green-mid); color: #fff;
  border-color: var(--green-mid);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.gallery-card {
  border-radius: var(--radius); overflow: hidden;
  background: #fff; border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
  animation: fadeUp 0.4s ease forwards;
}
.gallery-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.14);
}

.gallery-thumb { position: relative; overflow: hidden; }
.gallery-thumb img {
  width: 100%; height: 220px; object-fit: cover;
  cursor: pointer; transition: transform 0.4s ease;
}
.gallery-thumb img:hover { transform: scale(1.05); }

.placeholder-thumb {
  height: 220px; display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 10px;
  background: linear-gradient(135deg, #e8f5ec 0%, #d4edda 100%);
  color: var(--green-mid);
}
.placeholder-thumb i { font-size: 2.8rem; opacity: 0.6; }
.placeholder-thumb span { font-size: 0.85rem; opacity: 0.7; font-weight: 500; }

.gallery-caption { padding: 16px 18px; }
.gallery-caption h4 { font-size: 0.98rem; font-weight: 600; color: var(--text-dark); margin-bottom: 4px; }
.gallery-caption p { font-size: 0.85rem; color: var(--text-mid); margin-bottom: 8px; }
.gallery-date { font-size: 0.78rem; color: rgba(0,0,0,0.35); }
.gallery-date i { margin-right: 4px; }

/* Lightbox */
.lightbox {
  position: fixed; inset: 0; z-index: 9999;
  background: rgba(0,0,0,0.9); display: flex;
  align-items: center; justify-content: center;
  opacity: 0; transition: opacity 0.3s ease; cursor: pointer;
}
.lightbox.active { opacity: 1; }
.lightbox img { max-width: 90vw; max-height: 90vh; border-radius: 8px; box-shadow: 0 8px 48px rgba(0,0,0,0.5); }
.lightbox-close {
  position: absolute; top: 24px; right: 32px;
  font-size: 2.4rem; color: #fff; background: none;
  border: none; cursor: pointer; opacity: 0.7;
}
.lightbox-close:hover { opacity: 1; }

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

/* ── Footer ── */
.footer {
  background: var(--dark-bg); color: rgba(255,255,255,0.45);
  text-align: center; padding: 28px 24px;
  font-size: 0.83rem; line-height: 1.8;
}
.visitor-counter {
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid rgba(255,255,255,0.15);
  font-size: 0.78rem;
  color: rgba(255,255,255,0.55);
  letter-spacing: 0.04em;
}
.visitor-counter i {
  margin-right: 5px;
  font-size: 0.68rem;
}
.visitor-counter strong {
  color: rgba(255,255,255,0.8);
  font-weight: 600;
}

/* ── Scroll Fade ── */
.scroll-fade {
  opacity: 0; transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.scroll-fade.visible { opacity: 1; transform: translateY(0); }

/* ── Responsive ── */
@media (max-width: 900px) {
  .professor-card { flex-direction: column; align-items: center; text-align: center; padding: 32px 22px; gap: 28px; }
  .prof-education li { flex-direction: column; gap: 2px; text-align: left; }
  .contact-grid { grid-template-columns: 1fr; gap: 36px; }
}

@media (max-width: 768px) {
  .hamburger { display: block; }
  .nav-links {
    display: none; flex-direction: column;
    position: absolute; top: 64px; left: 0; width: 100%;
    background: rgba(15,28,20,0.98); padding: 12px 0 20px;
    border-bottom: 1px solid rgba(74,158,94,0.2);
  }
  .nav-links.open { display: flex; }
  .nav-link { padding: 12px 28px; border-radius: 0; }
  .strip-grid { grid-template-columns: repeat(2, 1fr); }
  .alumni-stats { flex-direction: row; flex-wrap: wrap; justify-content: center; }
  .stat-box { min-width: 80px; padding: 16px 20px; }
}

@media (max-width: 520px) {
  .strip-grid { grid-template-columns: 1fr 1fr; }
  .hero-btns { flex-direction: column; align-items: center; }
  .pub-filters { justify-content: flex-start; }
  .member-tabs { overflow-x: auto; }
  .tab-btn { white-space: nowrap; }
  .alumni-controls { flex-direction: column; align-items: flex-start; }
}