/* ── Custom Properties ────────────────────────────────── */

:root {
  --bg: #1A1410;
  --fg: #F0E8DD;
  --primary: #D4923A;
  --accent: #E07B3C;
  --fg-muted: #958878;
}

/* ── Reset ────────────────────────────────────────────── */

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

html, body {
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  background: var(--bg);
  color: var(--fg);
  font-family: 'Plus Jakarta Sans', system-ui, sans-serif;
}

/* ── Noise Overlay ────────────────────────────────────── */

.noise-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px 256px;
  opacity: 0.4;
}

/* ── Language Switch ──────────────────────────────────── */

.lang-switch {
  position: fixed;
  top: 1.5rem;
  right: 1.5rem;
  z-index: 101;
  display: flex;
  gap: 0.5rem;
}

.lang-btn {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  opacity: 0.4;
  transition: opacity 0.2s ease;
  padding: 0.25rem;
  line-height: 1;
}

.lang-btn:hover {
  opacity: 0.8;
}

.lang-btn.active {
  opacity: 1;
}

/* ══════════════════════════════════════════════════════════
   HERO — single viewport, no scroll
   ══════════════════════════════════════════════════════════ */

.hero {
  position: relative;
  height: 100vh;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  overflow: hidden;
}

/* ── Background Illustration ──────────────────────────── */

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background: url('tribu-camp.webp') center 60% / cover no-repeat;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.8s ease-out;
  mask-image: radial-gradient(
    ellipse 80% 75% at 50% 60%,
    black 0%,
    rgba(0,0,0,0.5) 60%,
    transparent 100%
  );
  -webkit-mask-image: radial-gradient(
    ellipse 80% 75% at 50% 60%,
    black 0%,
    rgba(0,0,0,0.5) 60%,
    transparent 100%
  );
}

/* ── Ambient Glow ─────────────────────────────────────── */

.ambient-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 600px;
  height: 600px;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(224, 123, 60, 0.1) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
  animation: ambient-drift 60s ease-in-out infinite;
}

/* ── Fire Spark Canvas ────────────────────────────────── */

#fire-sparks {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}

/* ── Logo — top 20% ───────────────────────────────────── */

.logo {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: flex-end;
  gap: 0.75rem;
  margin-top: 8vh;
}

.logo svg {
  filter: none;
}

.fire-diamond {
  animation: none;
}

.logo-text {
  font-size: 5.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--fg);
  line-height: 1;
}

/* ── CTA — bottom 20% ────────────────────────────────── */

.cta {
  position: absolute;
  bottom: 10%;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.75rem 2rem;
  border-radius: 9999px;
  background: transparent;
  color: var(--fg);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: 1px solid rgba(212, 146, 58, 0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: all 0.3s ease;
}

.cta::after {
  content: '\2192';
  font-size: 1.1rem;
  transition: transform 0.3s ease;
}

.cta:hover {
  border-color: var(--primary);
  background: rgba(212, 146, 58, 0.1);
  box-shadow: 0 0 20px 4px rgba(224, 123, 60, 0.15);
}

.cta:hover::after {
  transform: translateX(4px);
}

.cta:active {
  transform: scale(0.97);
}

/* ══════════════════════════════════════════════════════════
   KEYFRAMES
   ══════════════════════════════════════════════════════════ */

.hero-bg.loaded {
  opacity: 0.30;
}

@keyframes breathe {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.03); }
}

@keyframes fire-flicker {
  0%, 100% { opacity: 0.6; }
  20% { opacity: 1; }
  50% { opacity: 0.7; }
  70% { opacity: 1; }
}

@keyframes ambient-drift {
  0%, 100% { transform: translate(-50%, -50%) scale(1); }
  25% { transform: translate(calc(-50% + 30px), calc(-50% - 20px)) scale(1.05); }
  50% { transform: translate(calc(-50% - 20px), calc(-50% + 15px)) scale(0.95); }
  75% { transform: translate(calc(-50% + 15px), calc(-50% + 25px)) scale(1.02); }
}

/* ══════════════════════════════════════════════════════════
   RESPONSIVE
   ══════════════════════════════════════════════════════════ */

@media (max-width: 480px) {
  .logo svg {
    width: 90px;
    height: auto;
  }

  .logo-text {
    font-size: 3rem;
  }

  .cta {
    font-size: 0.85rem;
    padding: 0.65rem 1.6rem;
  }
}

/* ── Reduced Motion ───────────────────────────────────── */

@media (prefers-reduced-motion: reduce) {
  .logo,
  .fire-diamond,
  .cta,
  .ambient-glow {
    animation: none;
  }

  .cta:hover {
    transform: none;
  }
}