/* STYX landing - entry point for the protocol.
   Same obsidian-water world as the spec site: marble type, antique gold, the river. */

@import url("fonts.css");

:root {
  --bg:        #0b0e12;
  --bg-deep:   #07090c;
  --surface:   #10141a;
  --surface2:  #161b23;
  --line:      #222933;
  --line-soft: #1a2028;
  --ink:       #eae5d6;
  --body:      #b9b3a3;
  --muted:     #7e7b6e;
  --gold:      #c8a45c;
  --gold-dim:  #97814e;
  --gold-soft: rgba(200, 164, 92, 0.10);
  --river:     #7fa3bc;
  --river-soft: rgba(127, 163, 188, 0.10);
  --display: "GFS Didot", "Didot", Georgia, serif;
  --serif:   "Source Serif 4", Georgia, "Times New Roman", serif;
  --mono:    "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --measure: 47rem;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--body);
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* dark water behind everything */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(1200px 700px at 85% -10%, rgba(127,163,188,0.05), transparent 60%),
    radial-gradient(900px 600px at -10% 110%, rgba(200,164,92,0.04), transparent 55%),
    var(--bg);
}

::selection { background: rgba(200,164,92,0.28); color: var(--ink); }

a { color: var(--gold); text-decoration: none; }
a:focus-visible { outline: 2px solid var(--gold); outline-offset: 3px; border-radius: 4px; }

/* ---------- top bar ---------- */

.topbar {
  max-width: 72rem;
  margin: 0 auto;
  padding: 26px 32px 0;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
}
.topbar .brand {
  font-family: var(--display);
  font-size: 21px;
  letter-spacing: 0.26em;
  color: var(--ink);
}
.topbar .brand .xi { color: var(--gold); }
.topbar nav { display: flex; flex-wrap: wrap; gap: 6px 26px; }
.topbar nav a {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  transition: color .14s ease;
}
.topbar nav a:hover { color: var(--gold); }

/* ---------- hero ---------- */

.hero {
  min-height: calc(92vh - 60px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 60px 24px 40px;
}

.hero > * { animation: rise .8s cubic-bezier(.2,.7,.3,1) both; }
.hero .kicker { animation-delay: .05s; }
.hero .mark   { animation-delay: .15s; }
.hero .lede   { animation-delay: .35s; }
.hero .cta    { animation-delay: .5s; }
.hero .frozen { animation-delay: .65s; }
@keyframes rise {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: none; }
}

.kicker {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 34px;
}

/* the wordmark stands on the waterline; the river carries its reflection */
.mark {
  font-family: var(--display);
  font-weight: 400;
  font-size: clamp(64px, 13vw, 138px);
  line-height: 1;
  letter-spacing: 0.22em;
  color: var(--ink);
  display: block;
}
.mark .xi { color: var(--gold); }
.mark .word, .mark .refl {
  display: block;
  /* recenter: trailing letter-space after the last glyph */
  padding-left: 0.22em;
}

.waterline {
  display: block;
  width: min(9.2em, 84vw);
  height: 1px;
  margin: 0.09em auto 0;
  font-size: inherit;
  background: linear-gradient(90deg,
    transparent,
    rgba(127,163,188,0.55) 18%,
    rgba(127,163,188,0.75) 50%,
    rgba(127,163,188,0.55) 82%,
    transparent);
  box-shadow: 0 0 18px rgba(127,163,188,0.25);
}

.refl {
  transform: scaleY(-1);
  margin-top: 0.02em;
  opacity: 0.34;
  filter: blur(2.5px);
  /* two mask layers, intersected: the vertical fade into the deep,
     and drifting wave slices that break the reflection */
  -webkit-mask-image:
    repeating-linear-gradient(180deg, rgba(0,0,0,0.95) 0 6px, rgba(0,0,0,0.3) 6px 8px),
    linear-gradient(to top, rgba(0,0,0,0.9) 18%, transparent 78%);
  mask-image:
    repeating-linear-gradient(180deg, rgba(0,0,0,0.95) 0 6px, rgba(0,0,0,0.3) 6px 8px),
    linear-gradient(to top, rgba(0,0,0,0.9) 18%, transparent 78%);
  -webkit-mask-composite: source-in;
  mask-composite: intersect;
  animation: heave 7s ease-in-out infinite alternate, lap 9s linear infinite;
  pointer-events: none;
  user-select: none;
}
@keyframes heave {
  from { opacity: 0.26; }
  to   { opacity: 0.4; }
}
@keyframes lap {
  from { -webkit-mask-position: 0 0,    0 0; mask-position: 0 0,    0 0; }
  to   { -webkit-mask-position: 0 24px, 0 0; mask-position: 0 24px, 0 0; }
}

.hero .lede {
  max-width: 42rem;
  margin-top: 20px;
  font-size: 19px;
  line-height: 1.62;
  font-style: italic;
}
.hero .lede b { color: var(--ink); font-weight: 600; font-style: normal; }

.cta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
  margin-top: 38px;
}
.btn {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink);
  border: 1px solid var(--gold-dim);
  border-radius: 999px;
  padding: 13px 28px;
  transition: color .14s ease, border-color .14s ease, background .14s ease;
}
.btn:hover { color: #e0c07f; border-color: var(--gold); background: var(--gold-soft); }
.btn.ghost { border-color: var(--line); color: var(--body); }
.btn.ghost:hover { color: var(--ink); border-color: var(--muted); background: rgba(234,229,214,0.03); }

.frozen {
  margin-top: 30px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

/* ---------- sections ---------- */

.section {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 34px 32px 0;
}
.section.wide { max-width: 62rem; }

h2 {
  font-family: var(--display);
  font-weight: 400;
  font-size: 28px;
  letter-spacing: 0.01em;
  color: var(--ink);
  margin: 40px 0 18px;
}
h2 .sec { color: var(--gold-dim); font-size: 17px; margin-right: 14px; letter-spacing: 0.08em; }

.section p { margin-bottom: 16px; }
.section p b { color: var(--ink); font-weight: 600; }

/* stat strip, same shape as the spec's */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(118px, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: 10px;
  overflow: hidden;
  margin: 28px 0 10px;
}
.stats .s { background: var(--surface); padding: 16px 18px 14px; }
.stats .v { font-family: var(--display); font-size: 24px; color: var(--ink); line-height: 1.15; }
.stats .v small { font-size: 14px; color: var(--gold); }
.stats .k {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-top: 6px;
}

/* the crossing: a vault's life in three steps */
.steps { list-style: none; margin-top: 4px; }
.step {
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: 22px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line-soft);
}
.step:last-child { border-bottom: none; }
.step .gn {
  font-family: var(--display);
  font-size: 27px;
  line-height: 1.3;
  color: var(--gold-dim);
  text-align: right;
}
.step h3 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 18.5px;
  color: var(--ink);
  margin-bottom: 6px;
}
.step p { font-size: 15.5px; margin: 0; }

/* ---------- gateways ---------- */

.gates-lede { font-style: italic; margin-top: -6px; }

.gates {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: 12px;
  overflow: hidden;
  margin-top: 24px;
}
.gate {
  background: var(--surface);
  padding: 26px 26px 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: background .18s ease;
}
.gate:hover { background: var(--surface2); }
.gate .chip {
  align-self: flex-start;
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  border: 1px solid;
  border-radius: 999px;
  padding: 2.5px 10px;
}
.gate .chip.gold { color: var(--gold); border-color: rgba(200,164,92,0.4); }
.gate .chip.blue { color: var(--river); border-color: rgba(127,163,188,0.4); }
.gate h3 {
  font-family: var(--display);
  font-weight: 400;
  font-size: 23px;
  color: var(--ink);
  transition: color .14s ease;
}
.gate:hover h3 { color: var(--gold); }
.gate p { font-size: 14.5px; line-height: 1.6; color: var(--body); }
.gate .go {
  margin-top: auto;
  padding-top: 8px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted);
  transition: color .14s ease;
}
.gate:hover .go { color: var(--gold); }

/* ---------- footer ---------- */

footer {
  max-width: var(--measure);
  margin: 84px auto 0;
  padding: 0 32px 64px;
  text-align: center;
}
footer .meander {
  height: 10px;
  background-image: url("assets/meander.svg");
  background-repeat: repeat-x;
  background-size: auto 10px;
  opacity: 0.55;
  margin-bottom: 34px;
}
.epigraph {
  font-style: italic;
  font-size: 16.5px;
  color: var(--body);
  max-width: 30rem;
  margin: 0 auto 18px;
}
.fine {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

/* ---------- responsive & preferences ---------- */

@media (max-width: 640px) {
  .topbar { padding: 20px 20px 0; flex-direction: column; align-items: center; gap: 12px; }
  .hero { min-height: auto; padding: 48px 20px 20px; }
  .section { padding-left: 20px; padding-right: 20px; }
  .step { grid-template-columns: 40px 1fr; gap: 14px; }
  .gates { grid-template-columns: 1fr; }
  footer { padding-left: 20px; padding-right: 20px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero > * { animation: none; }
  .refl { animation: none; }
}