/* Gulf Connect � Professional Static Site */

:root {
  --navy: #0a2540;
  --navy-light: #143a5c;
  --gold: #c9a227;
  --gold-light: #e8c96a;
  --cream: #f8f6f1;
  --white: #ffffff;
  --text: #2c3e50;
  --text-muted: #5a6b7d;
  --border: #e2e8f0;
  --shadow: 0 4px 24px rgba(10, 37, 64, 0.08);
  --shadow-lg: 0 12px 48px rgba(10, 37, 64, 0.12);
  --radius: 12px;
  --radius-lg: 20px;
  --max-width: 1200px;
  --header-height: 72px;
  --transition: 0.25s ease;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Source Sans 3', 'Source Sans Pro', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: 'Playfair Display', Georgia, serif;
  color: var(--navy);
  line-height: 1.25;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--navy);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--gold);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ?? Header ?? */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), box-shadow var(--transition), border-color var(--transition), backdrop-filter var(--transition);
}

.site-header.scrolled {
  box-shadow: var(--shadow);
}

/* ?????? header */
body.home .site-header {
  background: transparent;
  backdrop-filter: none;
  border-bottom-color: transparent;
  box-shadow: none;
}

body.home .site-header.scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom-color: var(--border);
  box-shadow: var(--shadow);
}

body.home .site-header:not(.scrolled) .nav-desktop a {
  color: rgba(255, 255, 255, 0.92);
}

body.home .site-header:not(.scrolled) .nav-desktop a:hover,
body.home .site-header:not(.scrolled) .nav-desktop a.active {
  color: var(--white);
  background: rgba(255, 255, 255, 0.14);
}

body.home .site-header:not(.scrolled) .nav-desktop a.nav-event {
  background: var(--gold);
  color: var(--navy);
}

body.home .site-header:not(.scrolled) .nav-desktop a.nav-event:hover {
  background: var(--gold-light);
  color: var(--navy);
}

body.home .site-header:not(.scrolled) .menu-toggle span {
  background: var(--white);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
}

.logo-img {
  height: 40px;
  width: auto;
  flex-shrink: 0;
}

/* ???? header ??? logo???????? logo */
body.home .logo-img-dark {
  display: none;
}

body.home .site-header.scrolled .logo-img-light {
  display: none;
}

body.home .site-header.scrolled .logo-img-dark {
  display: block;
}

.logo-footer {
  height: 50px;
  width: auto;
}

.nav-desktop {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-desktop a {
  padding: 8px 16px;
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--text);
  border-radius: 8px;
  transition: all var(--transition);
}

.nav-desktop a:hover,
.nav-desktop a.active {
  color: var(--navy);
  background: var(--cream);
}

.nav-desktop a.nav-event {
  background: var(--navy);
  color: var(--white);
}

.nav-desktop a.nav-event:hover {
  background: var(--navy-light);
  color: var(--gold-light);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--navy);
  margin: 5px 0;
  transition: var(--transition);
}

.nav-mobile {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  background: var(--white);
  border-bottom: 1px solid var(--border);
  padding: 16px 24px 24px;
  box-shadow: var(--shadow);
  z-index: 999;
}

.nav-mobile.open {
  display: block;
}

.nav-mobile a {
  display: block;
  padding: 12px 0;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text);
  border-bottom: 1px solid var(--border);
}

.nav-mobile a:last-child {
  border-bottom: none;
}

/* ?? Hero ?? */
.hero {
  margin-top: 0;
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--navy);
}

.hero-bg,
.hero-video {
  position: absolute;
  inset: 0;
  object-fit: cover;
  width: 100%;
  height: 100%;
}

.hero-bg {
  opacity: 0.35;
}

.hero-video {
  opacity: 0.65;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 37, 64, 0.45) 0%, rgba(10, 37, 64, 0.72) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: calc(var(--header-height) + 96px) 24px 120px;
  color: var(--white);
}

.hero-eyebrow {
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gold-light);
  margin-bottom: 16px;
}

.hero h1 {
  color: var(--white);
  font-size: clamp(2rem, 5vw, 3.2rem);
  margin-bottom: 20px;
  max-width: 720px;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: rgba(255,255,255,0.85);
  max-width: 600px;
  margin-bottom: 32px;
}

.hero-pillars {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.pillar {
  padding: 8px 16px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(201,162,39,0.4);
  border-radius: 100px;
  font-size: 0.8rem;
  color: var(--gold-light);
  letter-spacing: 0.05em;
}

/* ?? Sections ?? */
.section {
  padding: 80px 0;
}

.section-cream {
  background: var(--cream);
}

.section-navy {
  background: var(--navy);
  color: var(--white);
}

.section-navy h2,
.section-navy h3 {
  color: var(--white);
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-header h2 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  margin-bottom: 16px;
}

.section-header p {
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 auto;
  font-size: 1.05rem;
}

.section-navy .section-header p {
  color: rgba(255,255,255,0.7);
}

.gold-line {
  width: 48px;
  height: 3px;
  background: var(--gold);
  margin: 0 auto 20px;
}

/* ?? Cards Grid ?? */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 28px;
}

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

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.card-body {
  padding: 28px;
}

.card-body h3 {
  font-size: 1.25rem;
  margin-bottom: 12px;
}

.card-body p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* ?? Two Column ?? */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.two-col img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.two-col h2 {
  font-size: 2rem;
  margin-bottom: 20px;
}

.two-col p {
  color: var(--text-muted);
  margin-bottom: 16px;
}

/* ?? About Blocks (??) ?? */
.about-blocks {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.about-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--white);
}

.about-block-reverse .about-block-media {
  order: 2;
}

.about-block-media img {
  width: 100%;
  height: 100%;
  min-height: 280px;
  object-fit: cover;
}

.about-block-content {
  padding: 48px 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.about-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 12px;
}

.about-block-content h3 {
  font-size: 1.6rem;
  margin-bottom: 16px;
}

.about-block-content p {
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.75;
}

/* ?? Questions List ?? */
.questions-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.questions-list li {
  padding: 20px 24px;
  background: var(--white);
  border-radius: var(--radius);
  border-left: 3px solid var(--gold);
  font-weight: 500;
  color: var(--navy);
  box-shadow: var(--shadow);
}

/* ?? Stakeholder Cards ?? */
.stakeholder-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
}

.stakeholder-card {
  padding: 32px;
  background: var(--white);
  border-radius: var(--radius-lg);
  border-top: 3px solid var(--gold);
  box-shadow: var(--shadow);
}

.stakeholder-card h3 {
  font-size: 1.2rem;
  margin-bottom: 12px;
}

.stakeholder-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* ?? Sector Grid ?? */
.sector-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.sector-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
}

.sector-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.sector-card:hover img {
  transform: scale(1.05);
}

.sector-label {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 20px;
  background: linear-gradient(transparent, rgba(10,37,64,0.9));
  color: var(--white);
  font-family: 'Playfair Display', serif;
  font-size: 1.1rem;
  font-weight: 600;
}

/* ?? Event Page ?? */
body:has(.event-hero-info) {
  --text-muted: #3d4d5c;
}

body:has(.event-hero-info) .event-hero-info .hero-eyebrow {
  font-size: 0.95rem;
}

body:has(.event-hero-info) .event-hero-info p[style*="letter-spacing:0.04em"] {
  font-size: 0.95rem !important;
}

body:has(.event-hero-info) .event-meta-item .label {
  font-size: 0.85rem;
}

body:has(.event-hero-info) .event-meta-item .value {
  font-size: 1.05rem;
}

body:has(.event-hero-info) .section-header p {
  font-size: 1.1rem;
}

body:has(.event-hero-info) .two-col p,
body:has(.event-hero-info) .questions-list li,
body:has(.event-hero-info) .section p[style*="text-muted"] {
  font-size: 1.05rem;
}

body:has(.event-hero-info) .speaker-card .org-en {
  font-size: 1.05rem;
}

body:has(.event-hero-info) .speaker-card .session-tag {
  font-size: 0.85rem;
}

body:has(.event-hero-info) .agenda-time {
  font-size: 0.95rem;
}

body:has(.event-hero-info) .agenda-subtitle-en {
  font-size: 1.05rem;
}

body:has(.event-hero-info) .agenda-desc {
  font-size: 1rem;
}

body:has(.event-hero-info) .agenda-speakers {
  font-size: 0.95rem;
}

body:has(.event-hero-info) .agenda-speakers strong {
  font-size: 0.85rem;
}

.event-hero {
  margin-top: var(--header-height);
  position: relative;
}

.event-hero-img {
  width: 100%;
  max-height: 480px;
  object-fit: cover;
}

.event-hero-info {
  background: var(--navy);
  color: var(--white);
  padding: 40px 0;
}

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

.event-meta-item {
  padding: 20px;
  background: rgba(255,255,255,0.06);
  border-radius: var(--radius);
  border: 1px solid rgba(201,162,39,0.25);
}

.event-meta-item .label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--gold-light);
  margin-bottom: 6px;
}

.event-meta-item .value {
  font-size: 0.95rem;
  line-height: 1.5;
}

.event-nav {
  display: flex;
  justify-content: center;
  gap: 8px;
  padding: 16px 0;
  background: var(--cream);
  position: sticky;
  top: var(--header-height);
  z-index: 100;
  border-bottom: 1px solid var(--border);
}

.event-nav a {
  padding: 8px 20px;
  font-weight: 600;
  font-size: 1rem;
  border-radius: 50px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text);
  transition: all var(--transition);
}

.event-nav a:hover,
.event-nav a.active {
  background: var(--navy);
  color: var(--white);
}

/* Speakers */
.speaker-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.speaker-card {
  padding: 24px;
  background: var(--white);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: border-color var(--transition);
}

.speaker-card:hover {
  border-color: var(--gold);
}

.speaker-card .org-en {
  font-weight: 600;
  color: var(--navy);
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.speaker-card .org-zh {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.speaker-card .session-tag {
  display: inline-block;
  margin-top: 12px;
  padding: 4px 10px;
  background: var(--cream);
  border-radius: 4px;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Agenda Timeline */
.agenda-timeline {
  position: relative;
  padding-left: 32px;
}

.agenda-timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(var(--gold), var(--navy));
}

.agenda-item {
  position: relative;
  margin-bottom: 32px;
  padding: 28px 32px;
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.agenda-item::before {
  content: '';
  position: absolute;
  left: -28px;
  top: 32px;
  width: 12px;
  height: 12px;
  background: var(--gold);
  border-radius: 50%;
  border: 3px solid var(--white);
  box-shadow: 0 0 0 2px var(--gold);
}

.agenda-time {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--gold);
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.agenda-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: rgb(79, 128, 189);
  margin-bottom: 6px;
}

.agenda-subtitle,
.agenda-subtitle-en {
  font-size: 0.95rem;
  color: var(--navy);
  font-weight: 700;
  margin-bottom: 4px;
}

.agenda-subtitle-zh {
  font-size: 0.9rem;
  color: var(--navy);
  font-weight: 700;
  margin-top: 8px;
  margin-bottom: 4px;
}

.agenda-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 400;
  font-style: normal;
  margin-bottom: 6px;
}

.agenda-desc-zh {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 400;
  font-style: normal;
}

.agenda-speakers {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--navy);
}

.agenda-speakers strong {
  color: var(--gold);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* CTA Buttons */
.btn {
  display: inline-block;
  padding: 14px 32px;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 100px;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--gold);
  color: var(--navy);
}

.btn-primary:hover {
  background: var(--gold-light);
  color: var(--navy);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border: 2px solid var(--gold);
}

.btn-outline:hover {
  background: var(--gold);
  color: var(--navy);
}

.cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 24px;
}

/* ?? Contact ?? */
.contact-section {
  text-align: center;
  padding: 60px 0;
}

.contact-email {
  font-size: 1.3rem;
  font-family: 'Playfair Display', serif;
  color: var(--gold);
  margin-top: 12px;
}

.contact-email a {
  color: var(--gold);
}

.contact-email a:hover {
  color: var(--gold-light);
}

/* ?? Footer ?? */
.site-footer {
  background: var(--navy);
  color: rgba(255,255,255,0.7);
  padding: 16px 0;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-brand .logo-footer {
  opacity: 0.95;
}

.footer-tagline {
  display: none;
}

.footer-copy {
  font-size: 0.85rem;
}

.footer-pillars {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--gold-light);
}

.footer-sep {
  color: rgba(255, 255, 255, 0.35);
  font-weight: 300;
}

/* ?? Page Hero (subpages) ?? */
.page-hero {
  margin-top: var(--header-height);
  padding: 64px 0;
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-light) 100%);
  color: var(--white);
  text-align: center;
}

.page-hero h1 {
  color: var(--white);
  font-size: clamp(2rem, 4vw, 2.8rem);
  margin-bottom: 12px;
}

.page-hero p {
  color: rgba(255,255,255,0.75);
  max-width: 600px;
  margin: 0 auto;
  font-size: 1.05rem;
}

/* ?? Promo Gallery ?? */
.promo-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  margin-top: 32px;
}

.promo-gallery img {
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
}

/* ?? Responsive ?? */
@media (min-width: 901px) {
  .event-hero {
    display: none;
  }

  .event-hero-info {
    margin-top: var(--header-height);
  }
}

@media (max-width: 900px) {
  .two-col {
    grid-template-columns: 1fr;
  }

  .nav-desktop {
    display: none;
  }

  .menu-toggle {
    display: block;
  }

  .event-nav {
    overflow-x: auto;
    justify-content: center;
    padding: 12px 10px;
  }

  .event-nav a {
    padding: 8px 10px;
    font-size: 0.95rem;
  }

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

  .about-block {
    grid-template-columns: 1fr;
  }

  .about-block-reverse .about-block-media {
    order: 0;
  }

  .about-block-content {
    padding: 32px 28px;
  }
}

@media (max-width: 600px) {
  .section {
    padding: 56px 0;
  }

  .hero {
    min-height: 75vh;
  }

  .hero-content {
    padding: calc(var(--header-height) + 56px) 24px 80px;
  }

  .card-grid,
  .stakeholder-grid {
    grid-template-columns: 1fr;
  }

  .sector-grid {
    grid-template-columns: 1fr;
  }

  .agenda-item {
    padding: 20px;
  }

  .footer-inner {
    display: grid;
    grid-template-columns: auto 1fr;
    align-items: center;
    column-gap: 14px;
    row-gap: 12px;
    padding: 0 16px;
  }

  .footer-brand {
    padding: 0;
    grid-column: 1;
    grid-row: 1;
  }

  .footer-brand .logo-footer {
    padding: 0;
    height: 40px;
    display: block;
  }

  .footer-tagline {
    display: flex;
    flex-direction: column;
    gap: 2px;
    grid-column: 2;
    grid-row: 1;
    font-size: 0.8rem;
    line-height: 1.35;
    color: white;
    font-weight: 500;
  }

  .footer-pillars {
    grid-column: 1 / -1;
    grid-row: 2;
    font-size: 0.7rem;
    gap: 6px;
  }

  .footer-copy {
    grid-column: 1 / -1;
    grid-row: 3;
    font-size: 0.75rem;
  }
}