:root {
  --bg: #03050a;
  --bg-elevated: #0a0f1c;
  --panel-bg: rgba(10, 15, 28, 0.72);
  --border: rgba(120, 160, 220, 0.18);
  --text: #eaf0fb;
  --text-dim: #9fb0cc;
  --brand-blue: #4fa8ff;
  --brand-blue-deep: #1c4d8f;
  --accent: #ffb454;
  --accent-dim: #d99a4a;
  --font-display: 'Space Grotesk', 'Inter', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  overflow: hidden;
  height: 100vh;
  width: 100vw;
}
body.no-webgl { overflow: auto; height: auto; }

.skip-link {
  position: absolute; left: -999px; top: 0;
  background: var(--accent); color: #1a1200; padding: 0.6rem 1rem; z-index: 999;
}
.skip-link:focus { left: 1rem; top: 1rem; }

h1, h2, h3 { font-family: var(--font-display); font-weight: 600; margin: 0 0 0.4em; }

/* ---------- Loading ---------- */
.loading-screen {
  position: fixed; inset: 0; z-index: 100;
  background: radial-gradient(ellipse at 50% 40%, #0a1226 0%, #03050a 70%);
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 1.4rem;
}
.loading-mark {
  font-family: var(--font-display); font-size: clamp(2.4rem, 8vw, 4rem); font-weight: 700;
  letter-spacing: 0.08em; color: var(--brand-blue);
  text-shadow: 0 0 40px rgba(79, 168, 255, 0.6);
  animation: pulseGlow 2.2s ease-in-out infinite;
}
@keyframes pulseGlow {
  0%, 100% { text-shadow: 0 0 30px rgba(79,168,255,0.5); }
  50% { text-shadow: 0 0 60px rgba(79,168,255,0.9); }
}
.loading-track { width: min(280px, 60vw); height: 3px; background: rgba(255,255,255,0.1); border-radius: 4px; overflow: hidden; }
.loading-bar { height: 100%; width: 100%; background: linear-gradient(90deg, var(--brand-blue), var(--accent)); transform: scaleX(0); transform-origin: left; }
.loading-caption { color: var(--text-dim); font-size: 0.85rem; letter-spacing: 0.04em; }

/* ---------- App shell ---------- */
#app { position: fixed; inset: 0; }
#scene-canvas { position: absolute; inset: 0; display: block; touch-action: none; }

.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 20;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.1rem clamp(1rem, 3vw, 2.4rem);
  background: linear-gradient(to bottom, rgba(3,5,10,0.75), transparent);
  pointer-events: none;
}
.site-header > * { pointer-events: auto; }

.logo-btn {
  display: flex; align-items: center; gap: 0.5rem;
  background: none; border: none; color: var(--text);
  font-family: var(--font-display); font-weight: 700; font-size: 1.1rem; letter-spacing: 0.08em;
  cursor: pointer; padding: 0.3rem 0.2rem;
}
.logo-dot {
  width: 12px; height: 12px; border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #fff, var(--brand-blue) 60%, var(--brand-blue-deep));
  box-shadow: 0 0 14px rgba(79,168,255,0.9);
}

.header-nav { display: flex; gap: 0.4rem; }
.nav-link {
  background: rgba(255,255,255,0.03); border: 1px solid var(--border); color: var(--text-dim);
  font-family: var(--font-body); font-size: 0.82rem; letter-spacing: 0.02em;
  padding: 0.5rem 0.9rem; border-radius: 999px; cursor: pointer;
  transition: all 0.25s ease;
  backdrop-filter: blur(6px);
}
.nav-link:hover, .nav-link:focus-visible { color: var(--text); border-color: var(--brand-blue); background: rgba(79,168,255,0.12); }

@media (max-width: 900px) { .header-nav { display: none; } }

.menu-btn {
  display: none; flex-direction: column; justify-content: center; gap: 5px;
  width: 40px; height: 40px; background: rgba(255,255,255,0.05); border: 1px solid var(--border);
  border-radius: 10px; cursor: pointer;
}
.menu-btn span { display: block; width: 18px; height: 2px; background: var(--text); margin: 0 auto; transition: transform 0.25s ease, opacity 0.25s ease; }
@media (max-width: 900px) { .menu-btn { display: flex; } }

.menu-overlay {
  position: fixed; inset: 0; z-index: 30;
  background: rgba(3,5,10,0.94); backdrop-filter: blur(10px);
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 0.8rem;
  opacity: 0; pointer-events: none; transition: opacity 0.3s ease;
}
.menu-overlay.is-open { opacity: 1; pointer-events: auto; }
.nav-link.big { font-family: var(--font-display); font-size: 1.6rem; background: none; border: none; color: var(--text-dim); padding: 0.4rem 1rem; }
.nav-link.big:hover { color: var(--brand-blue); }

.hint {
  position: fixed; bottom: 4.2rem; left: 50%; transform: translateX(-50%);
  color: var(--text-dim); font-size: 0.78rem; letter-spacing: 0.03em;
  opacity: 0; z-index: 15; pointer-events: none; text-align: center; width: 90vw;
}

.site-footer {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 10;
  padding: 0.8rem 1.4rem; font-size: 0.72rem; color: var(--text-dim);
  background: linear-gradient(to top, rgba(3,5,10,0.7), transparent);
  pointer-events: none;
}
@media (max-width: 620px) { .site-footer { display: none; } }

/* ---------- Content Panel ---------- */
.panel-overlay {
  position: fixed; inset: 0; z-index: 39;
  background: rgba(0,0,0,0.35);
  opacity: 0; pointer-events: none; transition: opacity 0.35s ease;
}
.panel-overlay.is-open { opacity: 1; pointer-events: auto; }

.content-panel {
  position: fixed; top: 0; right: 0; bottom: 0; z-index: 40;
  width: min(440px, 100vw);
  background: var(--panel-bg);
  backdrop-filter: blur(18px) saturate(140%);
  border-left: 1px solid var(--border);
  transform: translateX(100%);
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  overflow-y: auto;
  padding: clamp(3.5rem, 8vh, 4.5rem) 2rem 3rem;
}
.content-panel.is-open { transform: translateX(0); }

@media (max-width: 760px) {
  .content-panel {
    width: 100vw; top: auto; height: 82vh; right: 0; left: 0;
    border-left: none; border-top: 1px solid var(--border);
    border-radius: 20px 20px 0 0;
    transform: translateY(100%);
    padding: 3.2rem 1.4rem 2.5rem;
  }
  .content-panel.is-open { transform: translateY(0); }
}

.panel-close {
  position: absolute; top: 1.1rem; right: 1.2rem;
  width: 38px; height: 38px; border-radius: 50%;
  background: rgba(255,255,255,0.06); border: 1px solid var(--border); color: var(--text);
  font-size: 1.4rem; line-height: 1; cursor: pointer;
}
.panel-close:hover { background: rgba(255,255,255,0.14); }

.panel-eyebrow { text-transform: uppercase; letter-spacing: 0.12em; font-size: 0.72rem; color: var(--accent); margin: 0 0 0.5rem; }
.panel-title { font-size: clamp(1.5rem, 3vw, 1.9rem); }
.panel-lead { color: var(--text-dim); font-size: 1.02rem; margin-bottom: 1.2rem; }
.panel-text { color: var(--text-dim); line-height: 1.65; margin-bottom: 1rem; font-size: 0.95rem; }

.panel-list-item, .panel-card { margin-bottom: 1.3rem; padding-bottom: 1.1rem; border-bottom: 1px solid var(--border); }
.panel-list-item:last-child, .panel-card:last-child { border-bottom: none; }
.panel-list-item h3, .panel-card h3 { font-size: 1rem; color: var(--text); }
.panel-list-item p, .panel-card p { color: var(--text-dim); font-size: 0.9rem; line-height: 1.6; margin: 0; }

.panel-timeline { display: flex; flex-direction: column; gap: 1rem; margin-top: 0.5rem; }
.timeline-row { display: flex; gap: 1rem; align-items: baseline; }
.timeline-year { font-family: var(--font-display); color: var(--brand-blue); font-weight: 700; min-width: 3.6rem; }
.timeline-row p { color: var(--text-dim); font-size: 0.9rem; line-height: 1.55; margin: 0; }

.panel-note { color: var(--accent-dim); font-size: 0.88rem; font-style: italic; margin-top: 1rem; }

.panel-contact { display: flex; flex-direction: column; gap: 0.35rem; margin-top: 1.2rem; padding-top: 1.2rem; border-top: 1px solid var(--border); }
.panel-contact strong { color: var(--text); }
.panel-contact span { color: var(--text-dim); font-size: 0.9rem; }
.panel-contact a { color: var(--brand-blue); text-decoration: none; font-size: 0.9rem; }
.panel-contact a:hover { text-decoration: underline; }

.panel-form { display: flex; flex-direction: column; gap: 0.9rem; margin-top: 1.4rem; }
.panel-form label { display: flex; flex-direction: column; gap: 0.35rem; font-size: 0.82rem; color: var(--text-dim); }
.panel-form input, .panel-form textarea {
  background: rgba(255,255,255,0.05); border: 1px solid var(--border); border-radius: 8px;
  padding: 0.6rem 0.7rem; color: var(--text); font-family: var(--font-body); font-size: 0.9rem; resize: vertical;
}
.panel-form input:focus, .panel-form textarea:focus { outline: none; border-color: var(--brand-blue); }

.btn {
  font-family: var(--font-body); font-weight: 600; font-size: 0.9rem;
  padding: 0.75rem 1.3rem; border-radius: 999px; border: none; cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.btn-primary { background: linear-gradient(120deg, var(--brand-blue), var(--brand-blue-deep)); color: #fff; }
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 8px 24px rgba(79,168,255,0.35); }

.panel-cta { display: flex; flex-wrap: wrap; gap: 0.7rem; margin-top: 1.4rem; }

/* ---------- Toast ---------- */
.toast {
  position: fixed; bottom: 1.6rem; left: 50%; transform: translateX(-50%) translateY(20px);
  background: rgba(10,15,28,0.95); border: 1px solid var(--border); color: var(--text);
  padding: 0.8rem 1.3rem; border-radius: 12px; font-size: 0.86rem; max-width: min(420px, 88vw);
  z-index: 60; opacity: 0; transition: opacity 0.35s ease, transform 0.35s ease; pointer-events: none;
  box-shadow: 0 12px 30px rgba(0,0,0,0.4);
}
.toast.is-visible { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- Fallback (no WebGL) ---------- */
#fallback-content {
  max-width: 760px; margin: 0 auto; padding: 3rem 1.4rem 4rem; color: var(--text);
  font-family: var(--font-body); line-height: 1.7;
}
#fallback-content h1 { font-family: var(--font-display); color: var(--brand-blue); }
#fallback-content section { margin-bottom: 2.4rem; padding-bottom: 2rem; border-bottom: 1px solid var(--border); }
#fallback-content .eyebrow { text-transform: uppercase; letter-spacing: 0.1em; font-size: 0.72rem; color: var(--accent); }
#fallback-content a { color: var(--brand-blue); }

/* ---------- Scrollbar ---------- */
.content-panel::-webkit-scrollbar { width: 8px; }
.content-panel::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.15); border-radius: 8px; }

@media (prefers-reduced-motion: reduce) {
  .logo-dot, .loading-mark { animation: none !important; }
}