/* charonsync.app: dark, precise, with light used sparingly, like the lantern on the river. */

:root {
  --bg: #0b0b0c;
  --bg-card: rgba(20, 20, 24, 0.7);
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.16);
  --text: #ecebe8;
  --text-dim: #9b9aa1;
  --text-faint: #5f5e66;
  --lantern: #ffb547;
  --river: #5ee6ff;

  --in-sync: #3ddc97;
  --syncing: #4da3ff;
  --pending: #ffb547;
  --paused: #8a8f98;
  --conflict: #b388ff;
  --error: #ff5d6c;
  --offline: #6a6d77;

  --sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI Variable", "Segoe UI", Inter, Ubuntu, sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Mono", Menlo, Consolas, monospace;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --mx: 50vw;
  --my: 30vh;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
code { font-family: var(--mono); font-size: 0.88em; color: var(--text); background: rgba(255, 255, 255, 0.06); padding: 1px 6px; border-radius: 5px; }
::selection { background: rgba(94, 230, 255, 0.3); }

.wrap { width: min(1160px, 100% - 48px); margin: 0 auto; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 16px; top: 16px; z-index: 100; background: var(--text); color: var(--bg); padding: 8px 12px; border-radius: 8px; }

/* ---------------------------------------------------------------- backdrop */

.river { position: fixed; inset: 0; width: 100%; height: 100%; z-index: 0; pointer-events: none; }
.grid-bg {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image: linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 20%, transparent 100%);
}
/* The lantern follows the pointer */
.lantern-light {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background: radial-gradient(520px circle at var(--mx) var(--my), rgba(255, 181, 71, 0.07), transparent 60%);
}
header, main, footer { position: relative; z-index: 1; }

/* ---------------------------------------------------------------- type */

.eyebrow {
  display: inline-flex; gap: 12px; align-items: center;
  font: 600 11.5px/1 var(--mono); letter-spacing: 0.18em; text-transform: uppercase; color: var(--text-dim);
}
.eyebrow .num { color: var(--lantern); }
h1, h2, h3 { margin: 0; font-weight: 500; letter-spacing: -0.025em; }
h2 { font-size: clamp(30px, 4.4vw, 52px); line-height: 1.05; max-width: 16ch; }
h3 { font-size: 19px; letter-spacing: -0.01em; }

/* ---------------------------------------------------------------- buttons */

.button {
  display: inline-flex; align-items: center; gap: 10px;
  height: 48px; padding: 0 22px; border-radius: 999px;
  border: 1px solid var(--line-strong); background: rgba(255, 255, 255, 0.03);
  color: var(--text); font-weight: 500; text-decoration: none; cursor: pointer; font-size: 15px;
  transition: background .25s var(--ease), border-color .25s, box-shadow .35s var(--ease), transform .25s var(--ease);
}
.button:hover { background: rgba(255, 255, 255, 0.08); border-color: rgba(255, 255, 255, 0.3); }
.button.primary { background: var(--text); color: var(--bg); border-color: transparent; }
.button.primary:hover { background: #fff; box-shadow: 0 0 40px rgba(255, 255, 255, 0.22); }
.button.small { height: 38px; padding: 0 16px; font-size: 14px; }
.button.ghost { border-color: transparent; color: var(--text-dim); }
.button.ghost:hover { color: var(--text); }
.button svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

/* ---------------------------------------------------------------- header */

.top { position: sticky; top: 0; z-index: 10; backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); background: rgba(11, 11, 12, 0.6); border-bottom: 1px solid var(--line); }
.top-inner { display: flex; align-items: center; justify-content: space-between; height: 66px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.logo-tile { display: block; border-radius: 9px; overflow: hidden; background: #fff; box-shadow: 0 0 0 1px rgba(255,255,255,.12), 0 0 26px rgba(255, 181, 71, 0.22); flex: none; }
.logo-tile img { width: 100%; height: 100%; object-fit: cover; }
.brand .logo-tile { width: 34px; height: 34px; }
.wordmark { font: 600 14px/1 var(--mono); letter-spacing: 0.4em; }
.nav { display: flex; gap: 6px; }
.nav a { text-decoration: none; color: var(--text-dim); font-size: 14.5px; padding: 8px 12px; border-radius: 999px; transition: color .2s, background .2s; }
.nav a:hover { color: var(--text); background: rgba(255,255,255,.05); }
.nav .nav-gh { border: 1px solid var(--line-strong); color: var(--text); }

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

.hero { padding: 110px 0 40px; text-align: center; }
.hero .eyebrow { justify-content: center; }
.headline {
  margin: 28px auto 0;
  font-size: clamp(48px, 9vw, 120px);
  line-height: 0.95;
  letter-spacing: -0.045em;
  font-weight: 500;
}
.headline em { font-style: normal; background: linear-gradient(100deg, #fff 10%, var(--lantern) 55%, var(--river) 95%); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lede { max-width: 640px; margin: 30px auto 0; color: var(--text-dim); font-size: 18.5px; }
.actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-top: 36px; }
.fine { color: var(--text-faint); font-size: 14px; margin-top: 18px; }

.stage { position: relative; width: min(1100px, 100% - 48px); margin: 80px auto 0; perspective: 1600px; }
.halo { position: absolute; inset: 8% 10% -10%; background: radial-gradient(ellipse at 50% 40%, rgba(94, 230, 255, 0.18), rgba(255, 181, 71, 0.08) 40%, transparent 70%); filter: blur(40px); }
.tilt {
  position: relative; border-radius: 18px; overflow: hidden;
  border: 1px solid var(--line-strong);
  box-shadow: 0 50px 120px rgba(0, 0, 0, 0.7), 0 0 0 1px rgba(255,255,255,.04);
  transform: rotateX(var(--rx, 8deg)) rotateY(var(--ry, 0deg));
  transform-style: preserve-3d;
  transition: transform .5s var(--ease);
}
.shine { position: absolute; inset: 0; background: radial-gradient(600px circle at var(--sx, 50%) var(--sy, 0%), rgba(255,255,255,.10), transparent 50%); pointer-events: none; }

/* ---------------------------------------------------------------- ticker */

.ticker { margin-top: 90px; border-block: 1px solid var(--line); overflow: hidden; background: rgba(11,11,12,.6); }
.ticker-track { display: flex; gap: 56px; width: max-content; padding: 18px 0; animation: tick 40s linear infinite; font: 14px var(--mono); color: var(--text-dim); }
.ticker-track span::before { content: "◆"; color: var(--lantern); margin-right: 14px; font-size: 9px; vertical-align: 2px; }
@keyframes tick { to { transform: translateX(-50%); } }

/* ---------------------------------------------------------------- chapters */

.chapter { padding: 140px 0 0; }
.chapter, .download { scroll-margin-top: 30px; }
.chapter-head { display: grid; gap: 18px; margin-bottom: 48px; }
.chapter-head p { color: var(--text-dim); max-width: 560px; margin: 0; font-size: 17px; }
.split { display: grid; grid-template-columns: 1fr 1.05fr; gap: 56px; align-items: start; }
.split .chapter-head { margin: 0; }

.card {
  position: relative; border: 1px solid var(--line); border-radius: 18px; background: var(--bg-card);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  transition: border-color .3s, transform .4s var(--ease), background .3s;
}
.card::before {
  content: ""; position: absolute; inset: -1px; border-radius: inherit; padding: 1px; pointer-events: none;
  background: radial-gradient(260px circle at var(--cx, 50%) var(--cy, 50%), rgba(255, 181, 71, .55), transparent 70%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0); -webkit-mask-composite: xor; mask-composite: exclude;
  opacity: 0; transition: opacity .3s;
}
.card:hover { transform: translateY(-3px); background: rgba(26, 26, 31, .8); }
.card:hover::before { opacity: 1; }

/* Interactive ferry demo */
.ferry { border: 1px solid var(--line); border-radius: 22px; padding: 26px; background: rgba(14, 14, 17, .75); backdrop-filter: blur(10px); }
.ferry-controls { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.segmented { display: inline-flex; gap: 4px; padding: 4px; border-radius: 999px; background: rgba(255,255,255,.04); border: 1px solid var(--line); margin-right: auto; }
.segmented button { border: 0; background: transparent; color: var(--text-dim); font: 500 14px var(--sans); padding: 8px 16px; border-radius: 999px; cursor: pointer; transition: color .2s, background .2s; }
.segmented button.on { background: rgba(255,255,255,.12); color: var(--text); }
.ferry-text { color: var(--text-dim); margin: 18px 0 22px; min-height: 26px; }
.shores-demo { display: grid; grid-template-columns: 1fr 90px 1fr; gap: 0; align-items: stretch; }
.shore-box { border: 1px solid var(--line); border-radius: 14px; padding: 16px; background: rgba(255,255,255,.02); min-height: 300px; }
.shore-title { display: flex; justify-content: space-between; align-items: baseline; gap: 10px; margin-bottom: 12px; font: 600 11px var(--mono); letter-spacing: .14em; text-transform: uppercase; color: var(--text-faint); }
.shore-title code { letter-spacing: 0; text-transform: none; font-weight: 400; background: none; color: var(--text-dim); padding: 0; }
.files { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.files li {
  display: flex; justify-content: space-between; gap: 10px; align-items: center;
  padding: 8px 12px; border-radius: 9px; background: rgba(255,255,255,.04); border: 1px solid transparent;
  font: 13px var(--mono); transition: all .5s var(--ease);
}
.files li small { color: var(--text-faint); font-size: 11px; }
.files li.new { border-color: rgba(61, 220, 151, .45); background: rgba(61, 220, 151, .08); }
.files li.changed { border-color: rgba(77, 163, 255, .45); background: rgba(77, 163, 255, .08); }
.files li.gone { border-color: rgba(255, 93, 108, .4); background: rgba(255, 93, 108, .06); color: var(--text-faint); text-decoration: line-through; }
.files li.arriving { animation: arrive .7s var(--ease) both; }
@keyframes arrive { from { opacity: 0; transform: translateX(-30px) scale(.96); } }
.crossing { position: relative; display: grid; place-items: center; }
.crossing-line { position: absolute; left: 10px; right: 10px; top: 50%; height: 1px; background: linear-gradient(90deg, transparent, var(--river), transparent); opacity: .5; }
.crossing-arrow { position: relative; font-size: 22px; color: var(--river); background: var(--bg); width: 44px; height: 44px; display: grid; place-items: center; border-radius: 50%; border: 1px solid var(--line-strong); }
.ferry.busy .crossing-line { animation: flow 0.8s linear infinite; background: linear-gradient(90deg, transparent, var(--lantern), transparent); background-size: 50% 100%; background-repeat: no-repeat; opacity: 1; }
@keyframes flow { from { background-position: -50% 0; } to { background-position: 150% 0; } }
.ferry-legend { display: flex; gap: 10px; margin: 18px 0 0; font: 12px var(--mono); color: var(--text-faint); }
.ferry-legend .k { padding: 3px 9px; border-radius: 6px; border: 1px solid; }
.k.new { border-color: rgba(61,220,151,.45); color: var(--in-sync); }
.k.changed { border-color: rgba(77,163,255,.45); color: var(--syncing); }
.k.gone { border-color: rgba(255,93,108,.4); color: var(--error); }

/* Triggers */
.triggers { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.triggers .card { padding: 26px 22px 28px; min-height: 230px; display: grid; align-content: start; gap: 12px; }
.t-num { font: 600 12px var(--mono); color: var(--text-faint); letter-spacing: .14em; }
.triggers p { color: var(--text-dim); margin: 0; font-size: 15px; }
.triggers .highlight { border-color: rgba(255, 181, 71, .35); background: linear-gradient(160deg, rgba(255, 181, 71, .09), rgba(20,20,24,.7) 60%); }
.triggers .highlight .t-num { color: var(--lantern); }

/* Dry run terminal */
.ticks { list-style: none; padding: 0; margin: 10px 0 0; display: grid; gap: 14px; color: var(--text-dim); }
.ticks li { padding-left: 26px; position: relative; }
.ticks li::before { content: ""; position: absolute; left: 0; top: 9px; width: 12px; height: 6px; border-left: 2px solid var(--in-sync); border-bottom: 2px solid var(--in-sync); transform: rotate(-45deg); }
.ticks strong { color: var(--text); font-weight: 500; }
.terminal { position: relative; border: 1px solid var(--line-strong); border-radius: 16px; background: rgba(9, 9, 11, .92); overflow: hidden; box-shadow: 0 30px 80px rgba(0,0,0,.5); }
.term-bar { display: flex; align-items: center; gap: 7px; padding: 12px 14px; border-bottom: 1px solid var(--line); font: 11px var(--mono); color: var(--text-faint); letter-spacing: .1em; }
.term-bar i { width: 10px; height: 10px; border-radius: 50%; background: rgba(255,255,255,.12); }
.term-bar span { margin-left: 10px; }
.terminal pre { margin: 0; padding: 18px 20px; font: 13px/1.75 var(--mono); color: var(--text-dim); min-height: 380px; white-space: pre-wrap; }
.terminal pre .add { color: var(--syncing); }
.terminal pre .del { color: var(--error); }
.terminal pre .dir { color: var(--in-sync); }
.terminal pre .sum { color: var(--text); }
.terminal pre .caret { display: inline-block; width: 8px; height: 15px; background: var(--lantern); vertical-align: -2px; animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

/* Statuses */
.statuses { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(7, 1fr); gap: 12px; }
.statuses li { display: grid; gap: 6px; padding: 20px 16px; border-radius: 16px; border: 1px solid var(--line); background: var(--bg-card); }
.statuses .orb { display: grid; place-items: center; width: 44px; height: 44px; border-radius: 13px; margin-bottom: 8px; color: var(--tone); background: color-mix(in srgb, var(--tone) 14%, transparent); box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--tone) 35%, transparent), 0 0 24px color-mix(in srgb, var(--tone) 20%, transparent); font: 600 17px var(--mono); }
.statuses .orb.spin { animation: spin 1.4s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.statuses strong { font-weight: 500; }
.statuses small { color: var(--text-dim); font-size: 13px; }

/* Features */
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; margin: 0; border-top: 1px solid var(--line); }
.features div { padding: 28px 28px 30px 0; border-bottom: 1px solid var(--line); }
.features dt { font-weight: 500; font-size: 17px; margin-bottom: 8px; }
.features dd { margin: 0; color: var(--text-dim); font-size: 15px; padding-right: 20px; }

/* Oath */
.promises { margin-top: 150px; padding: 110px 0; border-block: 1px solid var(--line); background: radial-gradient(ellipse at 50% 120%, rgba(255, 181, 71, .1), transparent 60%), rgba(11, 11, 12, .55); }
.oath { list-style: none; padding: 0; margin: 40px 0 0; display: grid; gap: 8px; }
.oath li { display: grid; grid-template-columns: 90px 1fr; align-items: baseline; border-bottom: 1px solid var(--line); padding: 22px 0; }
.oath span { font: 500 14px var(--mono); color: var(--lantern); letter-spacing: .2em; }
.oath p { margin: 0; font-size: clamp(24px, 3.4vw, 42px); letter-spacing: -0.025em; line-height: 1.15; }

/* Download */
.download { padding-top: 140px; }
.systems { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.systems .card { padding: 28px; display: grid; gap: 8px; }
.systems .card p { color: var(--text-dim); margin: 0 0 14px; }
.systems .card.mine { border-color: rgba(255, 181, 71, .45); box-shadow: 0 0 60px rgba(255, 181, 71, .08); }
.systems .card.mine h3::after { content: "Your system"; margin-left: 10px; font: 600 10px var(--mono); letter-spacing: .14em; text-transform: uppercase; color: var(--lantern); vertical-align: 3px; }
.get { display: flex; gap: 8px; flex-wrap: wrap; }
.note { color: var(--text-faint); font-size: 14px; margin-top: 22px; }
.note a { color: var(--text-dim); }
.build { display: grid; grid-template-columns: 1fr 1.1fr; gap: 40px; align-items: center; margin-top: 90px; padding: 34px; border: 1px solid var(--line); border-radius: 22px; background: rgba(14,14,17,.7); }
.build p { color: var(--text-dim); }
.build .actions { justify-content: flex-start; margin-top: 18px; }
.terminal.mini pre { min-height: 0; color: var(--text); }
.copy { position: absolute; top: 10px; right: 10px; border: 1px solid var(--line-strong); background: rgba(255,255,255,.05); color: var(--text-dim); border-radius: 8px; padding: 4px 10px; font: 12px var(--mono); cursor: pointer; }
.copy:hover { color: var(--text); }

/* Footer */
.foot { margin-top: 140px; padding: 50px 0 60px; border-top: 1px solid var(--line); }
.foot-inner { display: flex; justify-content: space-between; gap: 40px; align-items: flex-start; flex-wrap: wrap; }
.foot-brand { display: flex; gap: 16px; align-items: center; color: var(--text-dim); font-size: 14px; }
.foot-brand .logo-tile { width: 40px; height: 40px; }
.foot-brand p { margin: 0; }
.legal { color: var(--text-faint); font-size: 13px; max-width: 420px; margin: 0; }

/* ---------------------------------------------------------------- reveal on scroll */

.reveal { opacity: 0; transform: translateY(24px); transition: opacity .9s var(--ease), transform .9s var(--ease); }
.reveal.seen { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }

/* ---------------------------------------------------------------- small screens */

@media (max-width: 960px) {
  .triggers, .systems { grid-template-columns: 1fr 1fr; }
  .statuses { grid-template-columns: repeat(4, 1fr); }
  .split, .build { grid-template-columns: 1fr; }
  .features { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .nav a:not(.nav-gh) { display: none; }
  .hero { padding-top: 70px; }
  .triggers, .systems, .features { grid-template-columns: 1fr; }
  .statuses { grid-template-columns: 1fr 1fr; }
  .shores-demo { grid-template-columns: 1fr; }
  .crossing { height: 50px; }
  .crossing-arrow { transform: rotate(90deg); }
  .oath li { grid-template-columns: 50px 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}