:root {
  --bg: #050505;
  --bg-soft: #101010;
  --surface: rgba(255, 255, 255, 0.05);
  --surface-strong: rgba(255, 255, 255, 0.08);
  --border: rgba(255, 255, 255, 0.12);
  --text: #f5f5f5;
  --muted: #bdbdbd;
  --accent: #e31b23;
  --accent-soft: rgba(227, 27, 35, 0.18);
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
  --radius: 24px;
  --radius-sm: 16px;
  --container: min(1180px, calc(100% - 2rem));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Bahnschrift", "Aptos", "Trebuchet MS", sans-serif;
  background:
    linear-gradient(180deg, rgba(7, 4, 4, 0.82), rgba(8, 4, 4, 0.9)),
    radial-gradient(circle at top, rgba(227, 27, 35, 0.16), transparent 34%),
    url("assets/hero-background.png") center top / cover fixed no-repeat,
    linear-gradient(180deg, #080808 0%, #040404 54%, #090909 100%);
  color: var(--text);
}

body.menu-open {
  overflow: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

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

.container {
  width: var(--container);
  margin: 0 auto;
}

.section {
  padding: 6rem 0;
}

.alt-section {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0.01));
}

.section-heading {
  max-width: 760px;
  margin-bottom: 2.5rem;
}

.section-heading h2 {
  margin: 0.4rem 0 0;
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1.1;
}

.eyebrow {
  color: #ff5c63;
  text-transform: uppercase;
  letter-spacing: 0.24em;
  font-size: 0.78rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(16px);
  background: rgba(5, 5, 5, 0.74);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.navbar {
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
}

.brand-mark {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.03);
  box-shadow: 0 0 0 6px rgba(227, 27, 35, 0.08);
  overflow: hidden;
}

.brand-mark img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.brand-text strong {
  font-size: 1rem;
  letter-spacing: 0.14em;
}

.brand-text small {
  color: var(--muted);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.2rem;
}

.nav-links a {
  color: #ececec;
  font-size: 0.95rem;
  position: relative;
  transition: color 0.25s ease;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.35rem;
  width: 100%;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.25s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: #fff;
}

.nav-links a:hover::after,
.nav-links a.active::after {
  transform: scaleX(1);
}

.menu-toggle {
  display: none;
  width: 48px;
  height: 48px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 14px;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  margin: 5px auto;
  background: white;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.hero-section {
  position: relative;
  overflow: hidden;
  min-height: calc(100vh - 78px);
  display: flex;
  align-items: center;
  padding: 6rem 0 4rem;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 80% 18%, rgba(227, 27, 35, 0.24), transparent 24%),
    radial-gradient(circle at 18% 12%, rgba(255, 255, 255, 0.06), transparent 18%);
  pointer-events: none;
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2rem;
  align-items: center;
}

.hero-content h1 {
  margin: 0;
  font-size: clamp(3rem, 9vw, 6.4rem);
  line-height: 0.95;
  letter-spacing: 0.06em;
}

.hero-subtitle {
  margin: 1rem 0;
  font-size: clamp(1.2rem, 2vw, 1.6rem);
  color: #f0f0f0;
  max-width: 34rem;
}

.hero-copy,
.about-box p,
.info-card p,
.activity-card p,
.talk-card p,
.speaker-card p,
.project-panel p,
.event-content p,
.contact-card p,
.site-footer p,
.feature-list li,
.contact-list li {
  color: var(--muted);
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 1.4rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease, background 0.25s ease;
}

.btn:hover {
  transform: translateY(-2px) scale(1.01);
}

.btn-primary {
  background: linear-gradient(135deg, #f3272f, #b50c12);
  color: white;
  box-shadow: 0 16px 34px rgba(227, 27, 35, 0.28);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.02);
  border-color: var(--border);
}

.hero-card,
.about-box,
.info-card,
.activity-card,
.talk-card,
.speaker-card,
.project-panel,
.event-card,
.sponsor-panel,
.contact-card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.03));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero-card {
  padding: 2rem;
}

.compass-card {
  position: relative;
  width: min(100%, 360px);
  aspect-ratio: 1;
  margin: 0 auto 2rem;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.14);
  background:
    radial-gradient(circle, rgba(255, 255, 255, 0.06) 0 28%, transparent 29%),
    radial-gradient(circle at center, rgba(227, 27, 35, 0.1), transparent 70%);
}

.compass-ring {
  position: absolute;
  inset: 9%;
  border: 8px solid white;
  border-right-color: var(--accent);
  border-left-color: var(--accent);
  border-radius: 50%;
  opacity: 0.95;
}

.compass-needle {
  position: absolute;
  inset: 22% 46%;
  background: linear-gradient(180deg, #ff2c33 0 48%, white 48% 100%);
  clip-path: polygon(50% 0, 100% 40%, 60% 50%, 100% 100%, 50% 86%, 0 100%, 40% 50%, 0 40%);
  transform: rotate(40deg);
}

.compass-core {
  position: absolute;
  inset: 44%;
  border-radius: 50%;
  background: white;
  box-shadow: 0 0 0 8px rgba(0, 0, 0, 0.65), 0 0 0 11px rgba(255, 255, 255, 0.18);
}

.hero-stat-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.9rem;
}

.hero-stat-row article {
  padding: 1rem;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.hero-stat-row strong {
  display: block;
  font-size: 1.2rem;
  margin-bottom: 0.25rem;
}

.hero-stat-row span {
  color: var(--muted);
  font-size: 0.9rem;
}

.about-box,
.project-panel,
.contact-card,
.sponsor-panel {
  padding: 2rem;
}

.inline-logo-panel {
  margin-top: 1.8rem;
  padding: 1rem;
  border-radius: 22px;
  background: radial-gradient(circle at top, rgba(227, 27, 35, 0.12), transparent 55%), rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.inline-logo-panel img {
  width: min(100%, 440px);
  display: block;
  margin: 0 auto;
  object-fit: contain;
}

.vision-grid,
.project-grid,
.sponsor-layout,
.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem;
}

.card-grid {
  display: grid;
  gap: 1.4rem;
}

.six-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.talks-grid,
.speakers-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.activity-card,
.talk-card,
.speaker-card {
  padding: 1.6rem;
  transition: transform 0.28s ease, border-color 0.28s ease, background 0.28s ease;
}

.activity-card:hover,
.talk-card:hover,
.speaker-card:hover,
.info-card:hover,
.event-card:hover,
.sponsor-panel:hover,
.contact-card:hover,
.project-panel:hover {
  transform: translateY(-8px);
  border-color: rgba(227, 27, 35, 0.44);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(227, 27, 35, 0.06));
}

.card-tag {
  display: inline-flex;
  margin-bottom: 0.9rem;
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: #ffb8bb;
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.info-card {
  padding: 1.9rem;
}

.video-thumb {
  min-height: 180px;
  border-radius: 18px;
  display: grid;
  place-items: center;
  margin-bottom: 1.2rem;
  background:
    linear-gradient(135deg, rgba(227, 27, 35, 0.9), rgba(227, 27, 35, 0.22)),
    linear-gradient(120deg, #171717, #090909);
  position: relative;
  overflow: hidden;
}

.video-thumb::before {
  content: "";
  position: absolute;
  inset: auto auto 18px 18px;
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.13);
  backdrop-filter: blur(8px);
}

.video-thumb::after {
  content: "";
  position: absolute;
  left: 40px;
  bottom: 35px;
  border-left: 14px solid white;
  border-top: 9px solid transparent;
  border-bottom: 9px solid transparent;
}

.video-thumb span {
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-size: 2.6rem;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.17);
}

.speaker-avatar {
  width: 72px;
  height: 72px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, #ff323a, #7b090d);
  font-size: 1.6rem;
  font-weight: 700;
}

.feature-list,
.contact-list,
.footer-links {
  margin: 0;
  padding: 0;
  list-style: none;
}

.feature-list li,
.contact-list li {
  padding: 0.72rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.feature-list li:last-child,
.contact-list li:last-child {
  border-bottom: 0;
}

.events-list {
  display: grid;
  gap: 1.1rem;
}

.event-card {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 1.4rem;
  padding: 1.3rem;
  align-items: center;
}

.event-date {
  min-height: 100%;
  border-radius: 18px;
  display: grid;
  place-items: center;
  background: linear-gradient(180deg, rgba(227, 27, 35, 0.2), rgba(255, 255, 255, 0.05));
  text-align: center;
}

.event-date strong {
  display: block;
  font-size: 2.4rem;
}

.event-date span {
  color: #ff9ba0;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.sponsor-logos {
  display: grid;
  gap: 1rem;
  margin-bottom: 1rem;
}

.sponsor-logos.multiple {
  grid-template-columns: repeat(3, 1fr);
}

.logo-box {
  min-height: 96px;
  display: grid;
  place-items: center;
  border-radius: 18px;
  border: 1px dashed rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.03);
  color: #f0f0f0;
  letter-spacing: 0.18em;
}

.logo-box.image-box {
  padding: 1rem;
  border-style: solid;
}

.logo-box.image-box img {
  width: min(100%, 220px);
  object-fit: contain;
}

.contact-list a {
  color: white;
}

.site-footer {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  background: #050505;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 0.8fr;
  gap: 1.5rem;
  padding: 3rem 0 2rem;
}

.footer-links li + li {
  margin-top: 0.7rem;
}

.footer-bottom {
  padding: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  text-align: center;
  color: var(--muted);
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.delay-1 {
  transition-delay: 0.12s;
}

.reveal.delay-2 {
  transition-delay: 0.24s;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 980px) {
  .hero-grid,
  .vision-grid,
  .project-grid,
  .sponsor-layout,
  .contact-grid,
  .footer-grid,
  .six-grid,
  .talks-grid,
  .speakers-grid {
    grid-template-columns: 1fr;
  }

  .hero-card {
    order: -1;
  }
}

@media (max-width: 820px) {
  .menu-toggle {
    display: inline-block;
  }

  .nav-links {
    position: fixed;
    top: 78px;
    left: 1rem;
    right: 1rem;
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem;
    border-radius: 22px;
    background: rgba(10, 10, 10, 0.97);
    border: 1px solid var(--border);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s ease;
  }

  .nav-links.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .hero-section {
    padding-top: 4rem;
  }

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

  .sponsor-logos.multiple {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .section {
    padding: 4.5rem 0;
  }

  .hero-actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .hero-stat-row {
    grid-template-columns: 1fr;
  }

  .brand-text small {
    display: none;
  }

  .brand-mark {
    width: 42px;
    height: 42px;
  }
}