/* ============================================
   TUP MTI ALUMNI ASSOCIATION — style.css
   ============================================ */

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

:root {
  --clr-primary: #1a1a2e;
  --clr-accent:  #c9272d;
  --clr-gold:    #f5c518;
  --clr-light:   #f4f4f6;
  --clr-mid:     #2e2e4a;
  --clr-text:    #1a1a2e;
  --clr-muted:   #666680;
  --clr-white:   #ffffff;
  --font-display: 'Georgia', serif;
  --font-body:    'Segoe UI', system-ui, sans-serif;
  --radius:       8px;
  --shadow:       0 4px 20px rgba(0,0,0,0.12);
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--clr-text);
  background: var(--clr-light);
  line-height: 1.6;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ============ NAVBAR ============ */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: var(--clr-primary);
  display: flex;
  align-items: center;
  padding: 0 32px;
  height: 60px;
  gap: 24px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.3);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  color: var(--clr-white);
  font-size: 1rem;
  font-weight: bold;
  white-space: nowrap;
  letter-spacing: 0.04em;
  flex-shrink: 0;
}

.nav-logo { font-size: 1.3rem; color: var(--clr-gold); }

.nav-links {
  display: flex;
  list-style: none;
  gap: 4px;
  margin-left: auto;
  align-items: center;
}

.nav-links a {
  color: rgba(255,255,255,0.85);
  font-size: 0.875rem;
  padding: 8px 14px;
  border-radius: var(--radius);
  transition: background 0.2s, color 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  background: var(--clr-accent);
  color: var(--clr-white);
}

/* Dropdown */
.dropdown { position: relative; }

.dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  background: var(--clr-mid);
  border-radius: var(--radius);
  min-width: 210px;
  list-style: none;
  box-shadow: 0 8px 24px rgba(0,0,0,0.25);
  overflow: hidden;
  z-index: 9999;
  pointer-events: auto;
}

/* Desktop: hover opens dropdown */
@media (min-width: 769px) {
  .dropdown:hover .dropdown-menu { display: block; }
}

/* JS-toggled class for mobile tap */
.dropdown.open .dropdown-menu { display: block; }

.dropdown-menu li a {
  display: block;
  padding: 11px 18px;
  color: rgba(255,255,255,0.9);
  font-size: 0.88rem;
  border-radius: 0;
  white-space: nowrap;
  transition: background 0.15s;
}

.dropdown-menu li a:hover { background: var(--clr-accent); color: #fff; }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: white;
  font-size: 1.4rem;
  cursor: pointer;
  margin-left: auto;
}

/* ============ HERO ============ */
.hero {
  position: relative;
  height: 100vh;
  min-height: 500px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-slideshow {
  position: absolute;
  inset: 0;
}

.hero-slide {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0;
  transition: opacity 1s ease;
}

.hero-slide.active { opacity: 1; }

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(26,26,46,0.55) 0%, rgba(26,26,46,0.75) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: white;
  max-width: 700px;
  padding: 0 24px;
}

.hero-eyebrow {
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--clr-gold);
  margin-bottom: 12px;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 6vw, 4rem);
  font-weight: bold;
  line-height: 1.15;
  margin-bottom: 16px;
}

.hero-sub {
  font-size: 1.05rem;
  opacity: 0.85;
  margin-bottom: 32px;
}

.hero-btns { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-primary { background: var(--clr-accent); color: white; }
.btn-primary:hover { background: #a81f24; }
.btn-outline { border: 2px solid white; color: white; }
.btn-outline:hover { background: white; color: var(--clr-primary); }

.hero-dots {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  z-index: 3;
}

.hero-dots .dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: rgba(255,255,255,0.4);
  cursor: pointer;
  transition: background 0.2s;
  border: none;
}

.hero-dots .dot.active { background: var(--clr-gold); }

/* ============ QUICK LINKS ============ */
.quick-links {
  padding: 64px 0;
  background: white;
}

.ql-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}

.ql-card {
  display: block;
  padding: 32px 24px;
  border-radius: var(--radius);
  background: var(--clr-light);
  border: 1px solid #e0e0ec;
  text-align: center;
  transition: transform 0.2s, box-shadow 0.2s;
  color: var(--clr-text);
}

.ql-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: var(--clr-accent);
}

.ql-icon { font-size: 2rem; display: block; margin-bottom: 12px; }
.ql-card h3 { font-family: var(--font-display); font-size: 1.1rem; margin-bottom: 8px; }
.ql-card p { font-size: 0.875rem; color: var(--clr-muted); }

/* ============ PAGE HERO (inner pages) ============ */
.page-hero {
  margin-top: 60px;
  position: relative;
  height: 260px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.page-hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
}

.page-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(26,26,46,0.6), rgba(26,26,46,0.85));
}

.page-hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: white;
}

.page-hero-content h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3rem);
  border: 3px solid white;
  padding: 12px 40px;
  display: inline-block;
}

/* ============ SECTION HEADINGS ============ */
.section-header {
  text-align: center;
  margin-bottom: 40px;
}

.section-header h2 {
  font-family: var(--font-display);
  font-size: 2rem;
  margin-bottom: 8px;
}

.section-header p {
  color: var(--clr-muted);
  font-size: 1rem;
}

.section { padding: 64px 0; }
.section-alt { background: white; }

/* ============ SLIDESHOW (inner pages) ============ */
.slideshow-wrap {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  background: #111;
  margin-bottom: 40px;
}

.slides-track {
  display: flex;
  transition: transform 0.5s ease;
}

.slide-item {
  min-width: 100%;
  aspect-ratio: 16/9;
  overflow: hidden;
  position: relative;
}

.slide-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Placeholder for missing images */
.slide-placeholder {
  width: 100%;
  height: 100%;
  background: var(--clr-mid);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 8px;
  color: rgba(255,255,255,0.5);
  font-size: 0.9rem;
}

.slide-placeholder .ph-icon { font-size: 3rem; }

.slide-caption {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  background: linear-gradient(transparent, rgba(0,0,0,0.7));
  color: white;
  padding: 24px 20px 16px;
  font-size: 0.9rem;
}

.slide-prev, .slide-next {
  position: absolute;
  top: 50%; transform: translateY(-50%);
  background: rgba(0,0,0,0.5);
  color: white;
  border: none;
  font-size: 1.4rem;
  width: 44px; height: 44px;
  border-radius: 50%;
  cursor: pointer;
  z-index: 10;
  transition: background 0.2s;
  display: flex; align-items: center; justify-content: center;
}

.slide-prev:hover, .slide-next:hover { background: var(--clr-accent); }
.slide-prev { left: 12px; }
.slide-next { right: 12px; }

.slide-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  padding: 12px 0;
}

.slide-dots .dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: #ccc;
  border: none;
  cursor: pointer;
  transition: background 0.2s;
}

.slide-dots .dot.active { background: var(--clr-accent); }

/* ============ THUMBNAIL GRID (previews) ============ */
.thumb-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
  margin-top: 24px;
}

.thumb-item {
  aspect-ratio: 4/3;
  border-radius: 6px;
  overflow: hidden;
  cursor: pointer;
  border: 2px solid transparent;
  transition: border-color 0.2s, transform 0.2s;
}

.thumb-item:hover, .thumb-item.active {
  border-color: var(--clr-accent);
  transform: scale(1.03);
}

.thumb-item img {
  width: 100%; height: 100%; object-fit: cover;
}

.thumb-placeholder {
  width: 100%; height: 100%;
  background: var(--clr-mid);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.7rem;
  color: rgba(255,255,255,0.4);
  text-align: center;
  padding: 4px;
}

/* ============ BUSINESS CARDS ============ */
.biz-list { display: flex; flex-direction: column; gap: 40px; }

.biz-card {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 32px;
  align-items: start;
  background: white;
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--clr-accent);
}

.biz-logo {
  width: 180px; height: 120px;
  object-fit: contain;
  border-radius: 4px;
  background: #f9f9f9;
  padding: 8px;
}

.biz-logo-ph {
  width: 180px; height: 120px;
  background: var(--clr-light);
  border-radius: 4px;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.75rem; color: var(--clr-muted);
  text-align: center; padding: 8px;
}

.biz-info h2 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  margin-bottom: 4px;
}

.biz-info .biz-tagline {
  font-size: 0.85rem;
  color: var(--clr-muted);
  margin-bottom: 16px;
}

.biz-detail {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.9rem;
}

.biz-detail span { color: var(--clr-muted); }

/* ============ COMMITTEE CARDS ============ */
.committee-list { display: flex; flex-direction: column; gap: 24px; }

.committee-card {
  background: white;
  border-radius: var(--radius);
  padding: 28px 32px;
  box-shadow: var(--shadow);
  border-top: 3px solid var(--clr-accent);
}

.committee-card h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  margin-bottom: 4px;
  color: var(--clr-accent);
}

.committee-card .obj {
  font-size: 0.875rem;
  color: var(--clr-muted);
  margin-bottom: 12px;
  font-style: italic;
}

.committee-card ul {
  padding-left: 20px;
  font-size: 0.9rem;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

/* ============ EVENT GRID ============ */
.event-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.event-card {
  background: white;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.2s;
}

.event-card:hover { transform: translateY(-4px); }

.event-img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
}

.event-img-ph {
  width: 100%;
  aspect-ratio: 16/9;
  background: var(--clr-mid);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.8rem; color: rgba(255,255,255,0.4);
}

.event-body { padding: 20px; }

.event-badge {
  display: inline-block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background: var(--clr-accent);
  color: white;
  padding: 3px 10px;
  border-radius: 20px;
  margin-bottom: 10px;
}

.event-body h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  margin-bottom: 6px;
}

.event-body p { font-size: 0.875rem; color: var(--clr-muted); }
.event-body .event-date { font-size: 0.8rem; color: var(--clr-accent); margin-top: 10px; font-weight: 600; }

/* ============ FOOTER ============ */
.footer {
  background: var(--clr-primary);
  color: rgba(255,255,255,0.75);
  padding: 40px 0;
  margin-top: 80px;
  font-size: 0.875rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 1rem;
  color: white;
  margin-bottom: 6px;
}

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

/* ============ HOME BREADCRUMB / PAGE NAV ============ */
.breadcrumb {
  padding: 12px 0;
  font-size: 0.8rem;
  color: var(--clr-muted);
}
.breadcrumb a { color: var(--clr-accent); }
.breadcrumb a:hover { text-decoration: underline; }

/* ============ RESPONSIVE ============ */
@media (max-width: 768px) {
  .nav-links { display: none; flex-direction: column; position: absolute; top: 60px; left: 0; right: 0; background: var(--clr-primary); padding: 12px; gap: 4px; z-index: 9998; }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .dropdown-menu { position: static; box-shadow: none; background: rgba(255,255,255,0.08); border-radius: 6px; margin: 4px 0; }

  .biz-card { grid-template-columns: 1fr; }
  .biz-logo, .biz-logo-ph { width: 100%; max-width: 180px; }

  .page-hero { height: 180px; }
  .page-hero-content h1 { font-size: 1.5rem; padding: 8px 20px; }

  .footer-inner { flex-direction: column; }
}

@media (max-width: 480px) {
  .thumb-grid { grid-template-columns: repeat(2, 1fr); }
}