/* =====================================================
   Earth Day Vietnam 2026 – Design System
   ===================================================== */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,600;0,700;1,400;1,600&family=Inter:wght@300;400;500;600;700&display=swap');

/* --- CSS Custom Properties --- */
:root {
  --color-primary:    #2D7A3A;
  --color-primary-dk: #1e5528;
  --color-accent:     #7DC142;
  --color-accent-lt:  #a5d96a;
  --color-gold:       #C8A44A;
  --color-gold-lt:    #e0c070;
  --color-dark:       #0E1A12;
  --color-dark-2:     #162419;
  --color-dark-3:     #1f3028;
  --color-text-light: #F0F7F0;
  --color-text-muted: #a8c4a8;
  --color-glass-bg:   rgba(14, 26, 18, 0.55);
  --color-glass-border: rgba(125, 193, 66, 0.25);

  --font-heading: 'Playfair Display', Georgia, serif;
  --font-body:    'Inter', system-ui, sans-serif;

  --space-xs:  0.5rem;
  --space-sm:  1rem;
  --space-md:  1.5rem;
  --space-lg:  2.5rem;
  --space-xl:  4rem;
  --space-2xl: 6rem;

  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;

  --shadow-card: 0 8px 32px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 24px rgba(125,193,66,0.2);

  --transition: 0.3s ease;
  --nav-height: 70px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background-color: var(--color-dark);
  color: var(--color-text-light);
  line-height: 1.7;
  overflow-x: hidden;
}

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

/* --- Typography --- */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  line-height: 1.25;
  font-weight: 700;
}
h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.5rem); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.6rem); }
h4 { font-size: 1.1rem; font-family: var(--font-body); font-weight: 600; }

p { color: var(--color-text-muted); }

.text-accent   { color: var(--color-accent); }
.text-gold     { color: var(--color-gold); }
.text-light    { color: var(--color-text-light); }
.text-center   { text-align: center; }

/* --- Layout --- */
.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

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

.section-label {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  border: 1px solid var(--color-glass-border);
  border-radius: 99px;
  padding: 0.3rem 1rem;
  margin-bottom: var(--space-sm);
}

.section-title {
  margin-bottom: var(--space-sm);
  color: var(--color-text-light);
}

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

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  background: rgba(14, 26, 18, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-glass-border);
  transition: background var(--transition);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.nav__brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.nav__logo-text {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text-light);
  line-height: 1.2;
}

.nav__logo-text span {
  display: block;
  font-size: 0.65rem;
  font-family: var(--font-body);
  font-weight: 400;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.nav__links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--transition);
  position: relative;
}

.nav__links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0; right: 0;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transition: transform var(--transition);
  border-radius: 2px;
}

.nav__links a:hover,
.nav__links a.active { color: var(--color-text-light); }
.nav__links a:hover::after,
.nav__links a.active::after { transform: scaleX(1); }

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.lang-toggle {
  background: transparent;
  border: 1px solid var(--color-glass-border);
  color: var(--color-text-muted);
  padding: 0.3rem 0.8rem;
  border-radius: 99px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font-body);
}
.lang-toggle:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}
.nav__hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text-light);
  border-radius: 2px;
  transition: var(--transition);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: 99px;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-accent), var(--color-primary));
  color: #fff;
  box-shadow: 0 4px 20px rgba(125,193,66,0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(125,193,66,0.5);
}

.btn-outline {
  background: transparent;
  color: var(--color-text-light);
  border: 1.5px solid var(--color-glass-border);
}
.btn-outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: rgba(125,193,66,0.08);
}

.btn-gold {
  background: linear-gradient(135deg, var(--color-gold), #a07a2a);
  color: var(--color-dark);
  font-weight: 700;
  box-shadow: 0 4px 20px rgba(200,164,74,0.35);
}
.btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(200,164,74,0.5);
}

.btn-sm { padding: 0.5rem 1.25rem; font-size: 0.82rem; }
.btn-lg { padding: 1rem 2.25rem; font-size: 1rem; }

/* --- Glassmorphism Card --- */
.glass-card {
  background: var(--color-glass-bg);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-md);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-card);
  padding: var(--space-lg);
  transition: transform var(--transition), box-shadow var(--transition);
}
.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card), var(--shadow-glow);
}

/* --- Grid Utilities --- */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-lg); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-lg); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-md); }

/* --- Hero Section (shared) --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  padding-top: var(--nav-height);
}

.hero__bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(14,26,18,0.55) 0%,
    rgba(14,26,18,0.72) 60%,
    rgba(14,26,18,0.92) 100%
  );
}

.hero__content {
  position: relative;
  z-index: 2;
  max-width: 900px;
  padding: var(--space-xl) var(--space-md);
}

.hero__eyebrow {
  display: inline-block;
  background: rgba(125,193,66,0.15);
  border: 1px solid rgba(125,193,66,0.4);
  color: var(--color-accent);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  border-radius: 99px;
  padding: 0.4rem 1.2rem;
  margin-bottom: var(--space-md);
}

.hero__title {
  color: var(--color-text-light);
  margin-bottom: var(--space-xs);
  text-shadow: 0 2px 20px rgba(0,0,0,0.5);
}

.hero__subtitle {
  font-family: var(--font-heading);
  font-size: clamp(1.2rem, 2.5vw, 1.8rem);
  font-style: italic;
  color: var(--color-gold);
  margin-bottom: var(--space-md);
}

.hero__theme {
  font-size: clamp(0.95rem, 1.8vw, 1.1rem);
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}

.hero__badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 99px;
  padding: 0.45rem 1.1rem;
  font-size: 0.85rem;
  color: var(--color-text-light);
}
.hero__badge svg { width: 14px; height: 14px; opacity: 0.7; }

.hero__ctas {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-sm);
}

/* --- Countdown Timer --- */
.countdown {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  margin: var(--space-lg) 0;
}

.countdown__item {
  text-align: center;
  min-width: 72px;
}

.countdown__num {
  display: block;
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  color: var(--color-text-light);
  line-height: 1;
  background: var(--color-glass-bg);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-sm);
  padding: 0.5rem 1rem;
  min-width: 72px;
  backdrop-filter: blur(8px);
}

.countdown__label {
  display: block;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-top: 0.5rem;
}

.countdown__sep {
  font-family: var(--font-heading);
  font-size: 2rem;
  color: var(--color-accent);
  align-self: flex-start;
  padding-top: 0.4rem;
}

/* --- About Section --- */
.about { background: var(--color-dark-2); }

.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: start;
}

.about__label {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.3rem;
}

.about__theme {
  font-family: var(--font-heading);
  font-style: italic;
  font-size: 1.15rem;
  color: var(--color-gold);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--color-glass-border);
}

.about__body { margin-bottom: var(--space-md); }

.about__vision {
  font-family: var(--font-heading);
  font-style: italic;
  font-size: 1.15rem;
  color: var(--color-text-light);
  border-left: 3px solid var(--color-accent);
  padding-left: var(--space-md);
}

.about__oed {
  background: linear-gradient(135deg, rgba(45,122,58,0.2), rgba(125,193,66,0.08));
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
}

.about__oed-title {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.about__oed-name {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  color: var(--color-text-light);
  margin-bottom: var(--space-sm);
}

/* --- Events Preview Cards --- */
.events { background: var(--color-dark); }

.event-card {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-glass-border);
  background: var(--color-glass-bg);
  backdrop-filter: blur(12px);
  transition: transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
}
.event-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card), var(--shadow-glow);
}

.event-card__img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  display: block;
}

.event-card__stripe {
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
}

.event-card__body { padding: var(--space-lg); flex: 1; display: flex; flex-direction: column; }

.event-card__date {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 0.05em;
  margin-bottom: var(--space-xs);
}

.event-card__title {
  color: var(--color-text-light);
  margin-bottom: var(--space-xs);
  font-size: 1.25rem;
}

.event-card__time,
.event-card__venue {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 0.3rem;
}

.event-card__cta { margin-top: auto; padding-top: var(--space-md); }

/* --- Speakers Section --- */
.speakers { background: var(--color-dark-2); }

.speaker-card {
  text-align: center;
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-glass-border);
  background: var(--color-glass-bg);
  backdrop-filter: blur(12px);
  transition: transform var(--transition), box-shadow var(--transition);
}
.speaker-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card), var(--shadow-glow);
}

.speaker-card__img-wrap {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  margin: 0 auto var(--space-md);
  border: 3px solid var(--color-accent);
  overflow: hidden;
  background: var(--color-dark-3);
  display: flex;
  align-items: center;
  justify-content: center;
}

.speaker-card__img { width: 100%; height: 100%; object-fit: cover; }

.speaker-card__initials {
  font-family: var(--font-heading);
  font-size: 2rem;
  color: var(--color-accent);
  font-weight: 700;
}

.speaker-card__name {
  color: var(--color-text-light);
  font-size: 1.2rem;
  margin-bottom: 0.4rem;
}

.speaker-card__title {
  font-size: 0.82rem;
  color: var(--color-gold);
  margin-bottom: var(--space-sm);
  font-style: italic;
}

.speaker-card__bio { font-size: 0.9rem; }

/* --- Fellowship Section --- */
.fellowship {
  background: linear-gradient(135deg, rgba(45,122,58,0.25) 0%, rgba(14,26,18,0.8) 100%),
              var(--color-dark);
  border-top: 1px solid var(--color-glass-border);
  border-bottom: 1px solid var(--color-glass-border);
}

.fellowship__inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-xl);
  align-items: center;
}

.fellowship__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-top: var(--space-md);
}

.fellowship__tag {
  background: rgba(125,193,66,0.12);
  border: 1px solid rgba(125,193,66,0.3);
  border-radius: 99px;
  padding: 0.3rem 0.9rem;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-accent);
}

/* --- Partnership Section --- */
.partners { background: var(--color-dark-2); }

.partners-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-lg); }

.partner-tier {
  border-radius: var(--radius-md);
  border: 1px solid var(--color-glass-border);
  background: var(--color-glass-bg);
  backdrop-filter: blur(12px);
  padding: var(--space-lg);
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
}
.partner-tier:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card), var(--shadow-glow);
}

.partner-tier__icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-sm);
  display: block;
}

.partner-tier__title { color: var(--color-text-light); margin-bottom: var(--space-xs); }
.partner-tier__desc { font-size: 0.9rem; }

.partners__cta { text-align: center; margin-top: var(--space-xl); }

/* --- Event Overview Pillars --- */
.overview { background: var(--color-dark-2); }
.pillars { background: var(--color-dark); }

.pillar {
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-glass-border);
  background: var(--color-glass-bg);
  backdrop-filter: blur(12px);
  transition: transform var(--transition), box-shadow var(--transition);
}
.pillar:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card), var(--shadow-glow);
}

.pillar__icon { font-size: 2.5rem; margin-bottom: var(--space-sm); display: block; }
.pillar__title { color: var(--color-text-light); margin-bottom: var(--space-xs); }

/* --- Agenda / Timeline --- */
.agenda { background: var(--color-dark-2); }

.timeline { position: relative; padding-left: 2rem; }
.timeline::before {
  content: '';
  position: absolute;
  left: 0.5rem;
  top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-accent), var(--color-primary));
  border-radius: 2px;
}

.timeline__item {
  position: relative;
  padding: var(--space-md) var(--space-md) var(--space-md) var(--space-md);
  margin-bottom: var(--space-sm);
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: all var(--transition);
}
.timeline__item:hover {
  background: var(--color-glass-bg);
  border-color: var(--color-glass-border);
}

.timeline__item::before {
  content: '';
  position: absolute;
  left: -1.65rem;
  top: 1.3rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 2px solid var(--color-dark);
  box-shadow: 0 0 8px rgba(125,193,66,0.5);
}

.timeline__time {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-gold);
  letter-spacing: 0.05em;
  margin-bottom: 0.2rem;
}

.timeline__desc { font-size: 0.95rem; color: var(--color-text-light); font-weight: 500; }

/* --- Why Attend --- */
.why { background: var(--color-dark); }

.why-card {
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-glass-border);
  background: var(--color-glass-bg);
  backdrop-filter: blur(12px);
  transition: transform var(--transition), box-shadow var(--transition);
}
.why-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card), var(--shadow-glow);
}

.why-card__num {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 700;
  color: rgba(125,193,66,0.15);
  line-height: 1;
  margin-bottom: 0.5rem;
}
.why-card__title { color: var(--color-text-light); margin-bottom: var(--space-xs); }

/* --- Session Picker --- */
.sessions { background: var(--color-dark-2); }

.session-tabs {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-glass-border);
  padding-bottom: 0;
}

.session-tab {
  padding: 0.75rem 1.5rem;
  background: transparent;
  border: none;
  border-bottom: 3px solid transparent;
  color: var(--color-text-muted);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  margin-bottom: -1px;
}
.session-tab:hover { color: var(--color-text-light); }
.session-tab.active {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

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

.session-panel__content {
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-glass-border);
  background: var(--color-glass-bg);
  backdrop-filter: blur(12px);
}

/* --- Venue --- */
.venue { background: var(--color-dark); }

.venue__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.venue__map {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-glass-border);
  height: 320px;
  background: var(--color-dark-3);
  display: flex;
  align-items: center;
  justify-content: center;
}

.venue__map iframe {
  width: 100%;
  height: 100%;
  border: 0;
  filter: grayscale(30%) invert(0.05);
}

.venue__address {
  font-size: 1rem;
  color: var(--color-text-light);
  margin: var(--space-sm) 0;
}

.venue__directions {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* --- Register CTA Section --- */
.register-cta {
  background: linear-gradient(135deg, #1e5528, var(--color-dark));
  text-align: center;
  padding: var(--space-2xl) 0;
  border-top: 1px solid var(--color-glass-border);
}

.register-cta h2 { margin-bottom: var(--space-sm); }
.register-cta p { margin-bottom: var(--space-lg); }

/* --- Sticky CTA Bar --- */
.sticky-cta {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  z-index: 90;
  background: rgba(14,26,18,0.95);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--color-glass-border);
  padding: var(--space-sm) var(--space-md);
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-md);
  transform: translateY(100%);
  transition: transform 0.4s ease;
}
.sticky-cta.visible { transform: translateY(0); }

.sticky-cta__text {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

/* --- Footer --- */
.footer {
  background: var(--color-dark-2);
  border-top: 1px solid var(--color-glass-border);
  padding: var(--space-xl) 0 var(--space-lg);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.footer__brand-logos {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-sm);
  flex-wrap: wrap;
}

.footer__logo-placeholder {
  background: rgba(125,193,66,0.12);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.75rem;
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--color-accent);
  letter-spacing: 0.05em;
}

.footer__tagline { font-style: italic; font-size: 0.9rem; }

.footer__heading {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.footer__links li { margin-bottom: 0.5rem; }
.footer__links a {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  transition: color var(--transition);
}
.footer__links a:hover { color: var(--color-text-light); }

.footer__socials {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-sm);
}

.footer__social {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--color-glass-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: var(--color-text-muted);
  transition: all var(--transition);
}
.footer__social:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: rgba(125,193,66,0.1);
}

.footer__bottom {
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-glass-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.footer__copyright { font-size: 0.82rem; color: var(--color-text-muted); }

/* --- Background Decorations --- */
.bg-section { position: relative; }
.bg-section::before {
  content: '';
  position: absolute;
  top: -80px; right: -80px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(45,122,58,0.12) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* --- Scroll Reveal Animations --- */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

/* =====================================================
   Responsive Styles
   ===================================================== */

@media (max-width: 1024px) {
  .grid-3       { grid-template-columns: repeat(2, 1fr); }
  .partners-grid { grid-template-columns: repeat(2, 1fr); }
  .about__grid  { gap: var(--space-lg); }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .fellowship__inner { grid-template-columns: 1fr; gap: var(--space-lg); }
}

@media (max-width: 768px) {
  :root { --space-2xl: 4rem; --space-xl: 2.5rem; }

  .nav__links { display: none; }
  .nav__links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: var(--nav-height); left: 0; right: 0;
    background: rgba(14,26,18,0.97);
    padding: var(--space-lg);
    gap: var(--space-md);
    border-bottom: 1px solid var(--color-glass-border);
  }
  .nav__hamburger { display: flex; }

  .hero__bg { background-attachment: scroll; }

  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .about__grid { grid-template-columns: 1fr; }
  .venue__grid { grid-template-columns: 1fr; }
  .partners-grid { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; gap: var(--space-lg); }
  .footer__bottom { flex-direction: column; text-align: center; }

  .countdown { gap: var(--space-sm); }
  .countdown__num { font-size: 1.8rem; min-width: 56px; padding: 0.4rem 0.75rem; }

  .session-tabs { flex-direction: column; border-bottom: none; }
  .session-tab { border-bottom: none; border-left: 3px solid transparent; text-align: left; }
  .session-tab.active { border-left-color: var(--color-accent); border-bottom: none; }

  .sticky-cta { flex-direction: column; gap: var(--space-xs); padding: var(--space-xs) var(--space-md); }
}

@media (max-width: 480px) {
  .btn-lg { padding: 0.85rem 1.6rem; font-size: 0.9rem; }
  .hero__ctas { flex-direction: column; align-items: center; }
  .hero__badges { flex-direction: column; align-items: center; }
}