/* ============================================================
   TopDeck Society — The Experience
   Scroll-driven 3D flythrough. Montfort-style overlay type.
   ============================================================ */

:root {
  --xp-bg: #0b0e17;
  --xp-text: #eef1fa;
  --xp-text-2: #aab2c8;
  --xp-brand-a: #6c5ce7;
  --xp-brand-b: #00cec9;
  --xp-font: "Sora", system-ui, sans-serif;
  --xp-body: "Inter", system-ui, sans-serif;
}

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

html { scroll-behavior: auto; }

body {
  background: var(--xp-bg);
  color: var(--xp-text);
  font-family: var(--xp-body);
  overflow-x: hidden;
}

/* Hide scrollbars for immersion (page still scrolls) */
body { scrollbar-width: none; }
body::-webkit-scrollbar { display: none; }

/* Scroll runway — drives progress */
.xp-scroll { height: 850vh; }

/* ======= Canvas ======= */
#gl {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  z-index: 0;
}

/* WebGL fallback */
body.no-webgl #gl { display: none; }
body.no-webgl {
  background:
    radial-gradient(1200px 700px at 20% 10%, rgba(108, 92, 231, 0.25), transparent 60%),
    radial-gradient(1000px 600px at 85% 85%, rgba(0, 206, 201, 0.18), transparent 60%),
    var(--xp-bg);
}

/* ======= Nav ======= */
.xp-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 26px clamp(20px, 4vw, 56px);
  font-family: var(--xp-font);
}

.xp-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--xp-text);
  text-decoration: none;
  font-weight: 300;
  font-size: 13px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  white-space: nowrap;
}

.xp-nav-links {
  display: flex;
  gap: clamp(18px, 3vw, 44px);
}

.xp-nav-links a {
  color: rgba(238, 241, 250, 0.55);
  text-decoration: none;
  font-weight: 300;
  font-size: 12px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  transition: color 0.35s ease;
  padding-bottom: 6px;
  border-bottom: 1px solid transparent;
}

.xp-nav-links a:hover {
  color: var(--xp-text);
  border-bottom-color: rgba(238, 241, 250, 0.6);
}

.xp-enter {
  color: var(--xp-text);
  text-decoration: none;
  font-weight: 300;
  font-size: 12px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  border: 1px solid rgba(238, 241, 250, 0.35);
  border-radius: 999px;
  padding: 10px 22px;
  transition: background 0.35s ease, border-color 0.35s ease;
  white-space: nowrap;
}

.xp-enter:hover {
  background: rgba(238, 241, 250, 0.1);
  border-color: rgba(238, 241, 250, 0.7);
}

/* ======= Overlay UI ======= */
.xp-ui {
  position: fixed;
  inset: 0;
  z-index: 20;
  pointer-events: none;
}

.xp-chapter {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 0 clamp(24px, 8vw, 120px);
  max-width: 1100px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(24px);
  will-change: opacity, transform;
}

.xp-chapter.on { visibility: visible; }
.xp-chapter.on .xp-link,
.xp-chapter.on .xp-cta { pointer-events: auto; }

.xp-eyebrow {
  font-family: var(--xp-font);
  font-weight: 400;
  font-size: clamp(11px, 1.1vw, 13px);
  letter-spacing: 0.42em;
  text-transform: uppercase;
  color: var(--xp-accent, var(--xp-text-2));
  margin-bottom: 26px;
}

.xp-big {
  font-family: var(--xp-font);
  font-weight: 200;
  font-size: clamp(30px, 4.6vw, 62px);
  line-height: 1.32;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-wrap: balance;
}

.xp-sub {
  margin-top: 28px;
  max-width: 560px;
  font-weight: 400;
  font-size: clamp(14px, 1.3vw, 17px);
  line-height: 1.8;
  color: var(--xp-text-2);
}

.xp-link {
  margin-top: 34px;
  align-self: flex-start;
  font-family: var(--xp-font);
  font-weight: 300;
  font-size: 12px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--xp-text);
  text-decoration: none;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--xp-accent, rgba(238, 241, 250, 0.5));
  transition: opacity 0.3s ease;
}

.xp-link:hover { opacity: 0.65; }

.xp-link::after { content: "  →"; }

/* Hero */
.xp-hero {
  align-items: center;
  text-align: center;
  max-width: none;
}

.xp-hero-mark {
  color: var(--xp-text);
  opacity: 0.9;
  margin-bottom: 34px;
}

.xp-title {
  font-family: var(--xp-font);
  font-weight: 200;
  font-size: clamp(34px, 7vw, 96px);
  letter-spacing: 0.28em;
  text-transform: uppercase;
  text-indent: 0.28em; /* optically recenter letterspaced text */
  line-height: 1.1;
}

.xp-tagline {
  margin-top: 26px;
  font-family: var(--xp-font);
  font-weight: 300;
  font-size: clamp(12px, 1.4vw, 15px);
  letter-spacing: 0.5em;
  text-transform: uppercase;
  color: var(--xp-text-2);
}

/* Finale */
.xp-finale { align-items: center; text-align: center; max-width: none; }

.xp-cta {
  margin-top: 44px;
  pointer-events: auto;
  font-family: var(--xp-font);
  font-weight: 300;
  font-size: 13px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--xp-bg);
  background: var(--xp-text);
  text-decoration: none;
  border-radius: 999px;
  padding: 18px 46px;
  transition: transform 0.35s ease, box-shadow 0.35s ease;
  box-shadow: 0 0 0 rgba(108, 92, 231, 0);
}

.xp-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 50px rgba(108, 92, 231, 0.45);
}

/* ======= Cue / counter / progress ======= */
.xp-cue {
  position: absolute;
  left: clamp(20px, 4vw, 56px);
  bottom: 34px;
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--xp-font);
  font-weight: 300;
  font-size: 11px;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--xp-text-2);
  transition: opacity 0.6s ease;
}

.xp-cue-line {
  width: 46px;
  height: 1px;
  background: rgba(238, 241, 250, 0.4);
  position: relative;
  overflow: hidden;
}

.xp-cue-line::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--xp-text);
  animation: cue-sweep 2.2s ease-in-out infinite;
}

@keyframes cue-sweep {
  0% { transform: translateX(-100%); }
  55% { transform: translateX(0); }
  100% { transform: translateX(100%); }
}

.xp-counter {
  position: absolute;
  right: clamp(20px, 4vw, 56px);
  bottom: 34px;
  font-family: var(--xp-font);
  font-weight: 300;
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--xp-text);
}

.xp-counter em {
  font-style: normal;
  color: var(--xp-text-2);
  font-size: 11px;
}

.xp-progress {
  position: absolute;
  right: clamp(10px, 2vw, 26px);
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 34vh;
  background: rgba(238, 241, 250, 0.14);
}

.xp-progress span {
  position: absolute;
  top: 0;
  left: -0.5px;
  width: 2px;
  height: 100%;
  background: linear-gradient(var(--xp-brand-a), var(--xp-brand-b));
  transform-origin: top;
  transform: scaleY(0);
}

/* ======= Responsive ======= */
@media (max-width: 880px) {
  .xp-nav-links { display: none; }
  .xp-nav { padding: 18px 20px; }
  .xp-brand { font-size: 11px; letter-spacing: 0.22em; gap: 8px; }
  .xp-enter { font-size: 10px; letter-spacing: 0.2em; padding: 8px 14px; }
  .xp-title { font-size: clamp(26px, 8.5vw, 44px); letter-spacing: 0.24em; text-indent: 0.24em; line-height: 1.4; max-width: 88vw; }
  .xp-tagline { font-size: 11px; letter-spacing: 0.4em; }
  .xp-chapter { justify-content: flex-end; padding-bottom: 18vh; }
  .xp-hero, .xp-finale { justify-content: center; padding-bottom: 0; }
  .xp-counter { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .xp-cue-line::after { animation: none; }
}