/* ============================================================
   BULLION — Obsidian & Silver Design System
   The People's Short · Flywheel Protocol
   ============================================================ */

:root {
  /* Core palette */
  --obsidian-0: #050608;
  --obsidian-1: #0a0c10;
  --obsidian-2: #10131a;
  --obsidian-3: #171b24;
  --line: rgba(200, 205, 220, 0.09);
  --line-strong: rgba(200, 205, 220, 0.18);

  /* Silver spectrum */
  --silver-100: #f4f5f8;
  --silver-200: #dcdfe6;
  --silver-300: #b8bcc8;
  --silver-400: #8d92a0;
  --silver-500: #62676f;

  /* Signal colors */
  --short-red: #ff4d5e;
  --gain-green: #38e8a4;

  /* Metallic gradients */
  --metal: linear-gradient(115deg, #e9ebf0 0%, #9aa0ae 28%, #f2f3f7 50%, #7c8290 72%, #d9dce4 100%);
  --metal-soft: linear-gradient(160deg, rgba(233,235,240,.14), rgba(124,130,144,.05));

  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;

  --ease: cubic-bezier(.22, .8, .24, 1);
  --maxw: 1200px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--obsidian-0);
  color: var(--silver-200);
  font-family: var(--font-display);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Fine background grid */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(200,205,220,.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(200,205,220,.025) 1px, transparent 1px);
  background-size: 72px 72px;
  pointer-events: none;
  z-index: 0;
}

::selection { background: rgba(233,235,240,.9); color: #0a0c10; }

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

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 32px; position: relative; z-index: 1; }

/* ---------- Typography ---------- */
h1, h2, h3 { font-weight: 600; letter-spacing: -0.02em; color: var(--silver-100); }

.display {
  font-size: clamp(2.8rem, 7vw, 5.4rem);
  line-height: 1.02;
  letter-spacing: -0.035em;
}

h2.section-title {
  font-size: clamp(1.9rem, 4vw, 3rem);
  line-height: 1.1;
  max-width: 18ch;
}

.metal-text {
  background: var(--metal);
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: metal-sheen 7s linear infinite;
}

@keyframes metal-sheen {
  to { background-position: 200% center; }
}

.kicker {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--silver-400);
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 22px;
}
.kicker::before, .kicker.rule-after::after {
  content: "";
  height: 1px;
  width: 42px;
  background: var(--line-strong);
}

.lede { font-size: 1.15rem; color: var(--silver-300); max-width: 62ch; }

.mono { font-family: var(--font-mono); }

/* ---------- Nav ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  border-bottom: 1px solid transparent;
  transition: background .4s var(--ease), border-color .4s var(--ease);
}
.nav.scrolled {
  background: rgba(5, 6, 8, 0.82);
  backdrop-filter: blur(14px);
  border-bottom-color: var(--line);
}
.nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 18px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: flex; align-items: center; gap: 12px;
  font-weight: 700; letter-spacing: 0.08em; font-size: 1.05rem;
  color: var(--silver-100);
}
.brand .brand-mark {
  width: 34px; height: 34px; border-radius: 9px;
  background: var(--metal);
  display: grid; place-items: center;
  color: #10131a; font-family: var(--font-mono); font-weight: 700; font-size: .95rem;
}
.brand .beta {
  font-family: var(--font-mono);
  font-size: .6rem; letter-spacing: .2em;
  color: var(--silver-400);
  border: 1px solid var(--line-strong);
  padding: 3px 7px; border-radius: 4px;
}
.nav-links { display: flex; align-items: center; gap: 30px; }
.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--silver-400);
  transition: color .25s;
  position: relative;
}
.nav-links a:hover, .nav-links a.active { color: var(--silver-100); }
.nav-links a::after {
  content: "";
  position: absolute; left: 0; bottom: -6px;
  width: 0; height: 1px; background: var(--silver-200);
  transition: width .3s var(--ease);
}
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }

.nav-toggle { display: none; background: none; border: 1px solid var(--line-strong); border-radius: 8px; color: var(--silver-200); font-family: var(--font-mono); font-size: .7rem; letter-spacing: .15em; padding: 8px 12px; cursor: pointer; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  padding: 15px 28px;
  border-radius: 10px;
  border: 1px solid var(--line-strong);
  color: var(--silver-100);
  cursor: pointer;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), background .3s;
  background: transparent;
  position: relative;
  overflow: hidden;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: var(--metal);
  background-size: 200% auto;
  color: #0c0e13;
  border: none;
  font-weight: 700;
}
.btn-primary:hover { box-shadow: 0 12px 40px -8px rgba(226,229,236,.35); background-position: right center; }
.btn-ghost:hover { background: rgba(226,229,236,.06); }

/* ---------- Sections ---------- */
section { padding: 130px 0; position: relative; }
.section-head { margin-bottom: 64px; }

/* ---------- Cards ---------- */
.card {
  background: var(--metal-soft);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 34px 30px;
  position: relative;
  transition: transform .4s var(--ease), border-color .4s;
}
.card:hover { transform: translateY(-5px); border-color: var(--line-strong); }
.card h3 { font-size: 1.05rem; margin-bottom: 12px; }
.card p { color: var(--silver-400); font-size: 0.95rem; }
.card .card-tag {
  font-family: var(--font-mono);
  font-size: 0.62rem; letter-spacing: 0.25em;
  color: var(--silver-500);
  margin-bottom: 18px; display: block;
}

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }

/* ---------- Image placeholders ---------- */
.img-placeholder {
  border: 1px dashed var(--line-strong);
  border-radius: 18px;
  background:
    repeating-linear-gradient(45deg, rgba(200,205,220,.02) 0 14px, transparent 14px 28px),
    var(--obsidian-2);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  color: var(--silver-500);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-align: center;
  padding: 24px;
  min-height: 220px;
}
.img-placeholder .ph-icon { font-size: 1.6rem; opacity: .6; }
.img-placeholder .ph-spec { font-size: 0.62rem; color: var(--silver-500); opacity: .7; letter-spacing: .1em; }

/* ---------- Ticker ---------- */
.ticker {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
  background: var(--obsidian-1);
  position: relative;
  z-index: 1;
}
.ticker-track {
  display: flex;
  gap: 64px;
  width: max-content;
  padding: 14px 0;
  animation: ticker-scroll 36s linear infinite;
}
.ticker:hover .ticker-track { animation-play-state: paused; }
@keyframes ticker-scroll { to { transform: translateX(-50%); } }
.ticker-item {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--silver-400);
  display: flex; gap: 12px; align-items: center;
  white-space: nowrap;
}
.ticker-item strong { color: var(--silver-100); font-weight: 600; }
.tick-down { color: var(--short-red); }
.tick-up { color: var(--gain-green); }

/* ---------- Flow diagram ---------- */
.flow {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 560px;
}
.flow-step {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 24px;
  align-items: center;
  padding: 26px 28px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--obsidian-1);
  transition: border-color .4s, background .4s, transform .4s var(--ease);
  cursor: default;
}
.flow-step.active {
  border-color: var(--line-strong);
  background: var(--obsidian-2);
  transform: translateX(10px);
}
.flow-step .num {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  color: var(--silver-500);
  transition: color .4s;
}
.flow-step.active .num {
  background: var(--metal);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
}
.flow-step h3 { font-size: 1.02rem; }
.flow-step p { font-size: .85rem; color: var(--silver-400); margin-top: 4px; }
.flow-connector {
  width: 1px; height: 30px;
  margin-left: 60px;
  background: linear-gradient(var(--line-strong), transparent);
}

/* ---------- Stats ---------- */
.stat-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.stat {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--obsidian-1);
  padding: 28px 26px;
}
.stat .stat-value {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  color: var(--silver-100);
  font-weight: 600;
}
.stat .stat-label {
  font-family: var(--font-mono);
  font-size: .62rem; letter-spacing: .25em;
  color: var(--silver-500);
  margin-top: 10px; text-transform: uppercase;
}

/* ---------- Contract bar ---------- */
.contract-bar {
  display: inline-flex; align-items: center; gap: 16px;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  background: var(--obsidian-1);
  padding: 12px 18px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--silver-300);
  max-width: 100%;
}
.contract-bar code { color: var(--silver-200); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.copy-btn {
  background: none; border: none;
  color: var(--silver-400); cursor: pointer;
  font-family: var(--font-mono); font-size: 0.66rem; letter-spacing: .12em;
  padding: 6px 10px; border: 1px solid var(--line); border-radius: 7px;
  transition: color .25s, border-color .25s;
  white-space: nowrap;
}
.copy-btn:hover { color: var(--silver-100); border-color: var(--line-strong); }

/* ---------- Reveal animations ---------- */
.reveal { opacity: 0; transform: translateY(34px); transition: opacity .9s var(--ease), transform .9s var(--ease); }
.reveal.visible { opacity: 1; transform: none; }
.reveal-delay-1 { transition-delay: .12s; }
.reveal-delay-2 { transition-delay: .24s; }
.reveal-delay-3 { transition-delay: .36s; }

/* ---------- Footer ---------- */
footer {
  border-top: 1px solid var(--line);
  padding: 70px 0 50px;
  position: relative; z-index: 1;
}
.footer-inner {
  display: flex; justify-content: space-between; align-items: flex-start;
  gap: 40px; flex-wrap: wrap;
}
.footer-links { display: flex; gap: 28px; flex-wrap: wrap; }
.footer-links a {
  font-family: var(--font-mono); font-size: .68rem; letter-spacing: .2em;
  color: var(--silver-400); transition: color .25s;
}
.footer-links a:hover { color: var(--silver-100); }
.footer-note { font-family: var(--font-mono); font-size: .64rem; color: var(--silver-500); letter-spacing: .1em; margin-top: 28px; max-width: 70ch; line-height: 1.8; }

/* ---------- Docs layout (protocol page) ---------- */
.docs-layout {
  display: grid;
  grid-template-columns: 250px 1fr;
  gap: 60px;
  padding-top: 140px;
  padding-bottom: 120px;
}
.docs-sidebar {
  position: sticky; top: 120px;
  align-self: start;
  border-left: 1px solid var(--line);
}
.docs-sidebar a {
  display: block;
  font-family: var(--font-mono);
  font-size: .7rem; letter-spacing: .14em;
  color: var(--silver-500);
  padding: 9px 0 9px 20px;
  border-left: 1px solid transparent;
  margin-left: -1px;
  transition: color .25s, border-color .25s;
}
.docs-sidebar a:hover { color: var(--silver-200); }
.docs-sidebar a.active { color: var(--silver-100); border-left-color: var(--silver-200); }
.docs-content section { padding: 0 0 90px; }
.docs-content h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); margin-bottom: 20px; scroll-margin-top: 120px; }
.docs-content p { color: var(--silver-300); max-width: 68ch; margin-bottom: 18px; }
.docs-content .layer {
  display: grid; grid-template-columns: 74px 1fr; gap: 22px;
  border: 1px solid var(--line); border-radius: 14px;
  background: var(--obsidian-1);
  padding: 24px 26px; margin-bottom: 14px;
  transition: border-color .3s, transform .3s var(--ease);
}
.docs-content .layer:hover { border-color: var(--line-strong); transform: translateX(6px); }
.docs-content .layer .layer-num {
  font-family: var(--font-mono); font-size: 1.15rem; color: var(--silver-500);
}
.docs-content .layer h3 { font-size: 1rem; margin-bottom: 6px; }
.docs-content .layer p { font-size: .88rem; color: var(--silver-400); margin: 0; }

/* ---------- FAQ ---------- */
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item summary {
  cursor: pointer; list-style: none;
  padding: 24px 0;
  display: flex; justify-content: space-between; align-items: center; gap: 20px;
  font-weight: 600; color: var(--silver-100); font-size: 1.02rem;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-family: var(--font-mono);
  color: var(--silver-400);
  transition: transform .3s var(--ease);
  font-size: 1.2rem;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item .faq-body { padding: 0 0 26px; color: var(--silver-400); max-width: 66ch; }

/* ---------- Risk cards ---------- */
.risk-card {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--obsidian-1);
  padding: 38px 36px;
  margin-bottom: 22px;
  transition: border-color .3s;
}
.risk-card:hover { border-color: var(--line-strong); }
.risk-card h3 { font-size: 1.25rem; margin-bottom: 22px; }
.risk-card .risk-block { margin-bottom: 20px; }
.risk-card .risk-block:last-child { margin-bottom: 0; }
.risk-card .risk-label {
  font-family: var(--font-mono);
  font-size: .62rem; letter-spacing: .26em; text-transform: uppercase;
  color: var(--silver-500);
  margin-bottom: 8px;
}
.risk-card .risk-block p { color: var(--silver-300); font-size: .95rem; max-width: 74ch; }

/* ---------- Hero background ---------- */
.hero-bg {
  position: absolute; inset: 0;
  z-index: 0;
  background: url('assets/hero-desktop.webp') center / cover no-repeat;
  opacity: .55;
}
.hero-shade {
  position: absolute; inset: 0;
  z-index: 0;
  background:
    linear-gradient(90deg, rgba(5,6,8,.88) 0%, rgba(5,6,8,.55) 38%, rgba(5,6,8,.12) 68%, rgba(5,6,8,.45) 100%),
    linear-gradient(180deg, rgba(5,6,8,.6) 0%, rgba(5,6,8,0) 28%, rgba(5,6,8,.08) 70%, #050608 100%);
}
@media (max-width: 820px), (orientation: portrait) {
  .hero-bg {
    background-image: url('assets/hero-mobile.webp') !important;
    background-position: center top;
    opacity: .45;
  }
  .hero-shade {
    background:
      linear-gradient(180deg, rgba(5,6,8,.75) 0%, rgba(5,6,8,.45) 30%, rgba(5,6,8,.55) 65%, #050608 100%) !important;
  }
}

/* ---------- Hero canvas ---------- */
#hero-canvas {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .stat-row { grid-template-columns: repeat(2, 1fr); }
  .docs-layout { grid-template-columns: 1fr; }
  .docs-sidebar { position: static; display: flex; flex-wrap: wrap; gap: 4px 18px; border-left: none; border-bottom: 1px solid var(--line); padding-bottom: 18px; }
  .docs-sidebar a { border-left: none; padding: 6px 0; }
  .nav-links { display: none; }
  .nav-links.open {
    display: flex; flex-direction: column; align-items: flex-start;
    position: absolute; top: 100%; left: 0; right: 0;
    background: rgba(5,6,8,.97); border-bottom: 1px solid var(--line);
    padding: 24px 32px; gap: 20px;
  }
  .nav-toggle { display: block; }
  section { padding: 90px 0; }
}
@media (max-width: 560px) {
  .stat-row { grid-template-columns: 1fr; }
  .display { font-size: 2.5rem; }
  .contract-bar { flex-wrap: wrap; }
}

/* ---------- Logo brand mark ---------- */
img.brand-mark { object-fit: cover; background: #050608; border: 1px solid var(--line-strong); }

/* ---------- Flow centering ---------- */
.flow { margin: 0 auto; width: 100%; }
.flow-step .num { text-align: center; }
.flow-connector { margin-left: 50%; }