/* OSAIKU site. Palette follows the OS visual system
   (abi/src/ui_visual_system.rs) and the logo's cyan-to-blue gradient. */

:root {
  --bg: #0a0e1a;            /* workspace background */
  --bg-tint: #0d1221;
  --surface: rgba(52, 61, 80, 0.42);   /* window #343d50 */
  --surface-solid: #1a2133;
  --titlebar: #2d3548;
  --line: rgba(96, 101, 120, 0.45);    /* window border #606578 */
  --line-soft: rgba(96, 101, 120, 0.22);
  --text: #e6edf7;
  --text-2: #aeb5c8;
  --text-3: #7f879c;
  --violet: #9283f5;        /* application accent */
  --violet-deep: #6659d9;   /* launcher */
  --glow: #7169a8;
  --cyan: #38d9ff;          /* logo */
  --blue: #2f6bff;          /* logo */
  --green: #4ade80;         /* security accent */
  --amber: #ffc857;         /* warning accent */
  --dusk: #f29bbd;          /* wallpaper sky */

  --radius: 16px;
  --radius-sm: 10px;
  --maxw: 1180px;
  --font: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-display: "Space Grotesk", "Inter", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "Cascadia Code", Consolas, monospace;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 17px/1.65 var(--font);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }

a { color: inherit; }

h1, h2, h3 {
  font-family: var(--font-display);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 0;
  text-wrap: balance;
}

p { margin: 0 0 1em; text-wrap: pretty; }

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 32px;
}

/* ---------- Shared bits ---------- */

.dot {
  display: inline-block;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--text-3);
  flex: none;
}
.dot--green { background: var(--green); box-shadow: 0 0 10px rgba(74, 222, 128, 0.6); }
.dot--amber { background: var(--amber); box-shadow: 0 0 10px rgba(255, 200, 87, 0.55); }

.chip {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 5px 12px;
  border-radius: 999px;
  font: 500 12px/1 var(--font-mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: 1px solid var(--line);
  background: rgba(10, 14, 26, 0.6);
  white-space: nowrap;
}
.chip--amber { color: var(--amber); border-color: rgba(255, 200, 87, 0.35); }
.chip--amber .dot { background: var(--amber); }

.grad {
  background: linear-gradient(100deg, var(--cyan) 0%, var(--blue) 45%, var(--violet) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.eyebrow, .section .label {
  font: 500 13px/1.4 var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--violet);
  margin-bottom: 18px;
}

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border-radius: 12px;
  font: 600 15px/1 var(--font);
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn:focus-visible, a:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; }
.btn--primary {
  color: #fff;
  background: linear-gradient(135deg, var(--violet-deep), var(--violet));
  box-shadow: 0 8px 28px -8px rgba(102, 89, 217, 0.8), inset 0 1px 0 rgba(255, 255, 255, 0.18);
}
.btn--primary:hover { box-shadow: 0 12px 34px -8px rgba(146, 131, 245, 0.9), inset 0 1px 0 rgba(255, 255, 255, 0.22); }
.btn--ghost {
  color: var(--text);
  border: 1px solid var(--line);
  background: rgba(52, 61, 80, 0.25);
}
.btn--ghost:hover { border-color: var(--violet); background: rgba(146, 131, 245, 0.1); }

/* ---------- Navigation ---------- */

.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(10, 14, 26, 0.72);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--line-soft);
}
.nav__inner {
  display: flex; align-items: center; gap: 28px;
  height: 66px;
}
.brand {
  display: inline-flex; align-items: center; gap: 12px;
  text-decoration: none;
  font: 700 19px/1 var(--font-display);
  letter-spacing: 0.04em;
}
.brand img { border-radius: 22%; }
.nav__links {
  display: flex; gap: 6px;
  margin-left: auto;
}
.nav__links a {
  padding: 8px 12px;
  border-radius: 8px;
  color: var(--text-2);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  transition: color 0.15s ease, background-color 0.15s ease;
}
.nav__links a:hover { color: var(--text); background: rgba(146, 131, 245, 0.1); }

/* ---------- Hero ---------- */

.hero {
  position: relative;
  padding: 88px 0 56px;
  isolation: isolate;
}
.hero::before {
  content: "";
  position: absolute; inset: 0;
  z-index: -1;
  background:
    radial-gradient(900px 520px at 82% 8%, rgba(146, 131, 245, 0.30), transparent 65%),
    radial-gradient(620px 420px at 98% 55%, rgba(242, 155, 189, 0.16), transparent 70%),
    radial-gradient(700px 480px at 4% 92%, rgba(56, 217, 255, 0.12), transparent 70%);
}
.hero::after {
  content: "";
  position: absolute; inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(174, 181, 200, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(174, 181, 200, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, #000 30%, transparent 80%);
  mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, #000 30%, transparent 80%);
}
.hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: 56px;
  align-items: center;
}
.hero h1 {
  font-size: clamp(40px, 5.4vw, 66px);
  font-weight: 700;
  margin-bottom: 24px;
}
.lead {
  font-size: 19px;
  color: var(--text-2);
  max-width: 34em;
  margin-bottom: 32px;
}
.hero__actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 28px; }
.hero__note {
  display: flex; align-items: center; gap: 10px;
  font-size: 14px;
  color: var(--text-3);
  margin: 0;
}

.hero__visual {
  position: relative;
  margin: 0;
}
.window {
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--titlebar);
  border: 1px solid rgba(123, 124, 145, 0.55);
  box-shadow:
    0 0 0 1px rgba(10, 14, 26, 0.6),
    0 40px 90px -30px rgba(4, 7, 16, 0.95),
    0 0 80px -10px rgba(113, 105, 168, 0.55);
}
.window__bar {
  display: flex; align-items: center; justify-content: space-between;
  height: 38px;
  padding: 0 14px 0 16px;
  background: linear-gradient(180deg, #333c50, var(--titlebar));
  border-bottom: 1px solid rgba(96, 101, 120, 0.5);
}
.window__title {
  font: 500 12px/1 var(--font-mono);
  letter-spacing: 0.06em;
  color: var(--text-2);
}
.window__ctl { display: flex; gap: 14px; }
.window__ctl i {
  width: 11px; height: 11px;
  border: 1.5px solid var(--text-3);
  border-radius: 3px;
}
.window__ctl i:first-child { height: 0; border-width: 0 0 1.5px; align-self: center; }
.window__ctl i.x {
  border: 0;
  position: relative;
}
.window__ctl i.x::before, .window__ctl i.x::after {
  content: "";
  position: absolute; left: 50%; top: 50%;
  width: 13px; height: 1.5px;
  background: var(--text-3);
  transform: translate(-50%, -50%) rotate(45deg);
}
.window__ctl i.x::after { transform: translate(-50%, -50%) rotate(-45deg); }

.hero__logo {
  position: absolute;
  left: -38px; bottom: 18px;
  width: 112px; height: 112px;
  border-radius: 22%;
  box-shadow: 0 18px 50px -10px rgba(47, 107, 255, 0.65), 0 0 0 1px rgba(56, 217, 255, 0.15);
  animation: float 7s ease-in-out infinite;
}
.hero__visual figcaption {
  margin-top: 14px;
  text-align: right;
  font-size: 13px;
  color: var(--text-3);
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* ---------- Stats ---------- */

/* 1px gaps over a line-coloured backdrop draw the dividers at every width. */
.stats {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  margin: 72px 0 0;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: var(--line-soft);
  overflow: hidden;
}
.stats > div {
  padding: 24px 24px 22px;
  background: #0c1120;
}
.stats dt {
  font: 600 30px/1.1 var(--font-display);
  letter-spacing: -0.02em;
  margin-bottom: 6px;
}
.stats dt small { font-size: 18px; color: var(--text-3); font-weight: 500; }
.stats dd { margin: 0; font-size: 14px; color: var(--text-2); line-height: 1.4; }
.stats__src { margin: 12px 0 0; font-size: 13px; color: var(--text-3); }

/* ---------- Sections ---------- */

.section { padding: 112px 0; }
.section--tint {
  background:
    radial-gradient(800px 400px at 50% 0%, rgba(146, 131, 245, 0.07), transparent 70%),
    var(--bg-tint);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}
.section h2 {
  font-size: clamp(30px, 3.6vw, 44px);
  font-weight: 600;
  margin-bottom: 24px;
  max-width: 22em;
}
.section p { color: var(--text-2); }
.intro { font-size: 18px; max-width: 46em; margin-bottom: 48px; }

/* ---------- Overview ---------- */

.split {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 72px;
  align-items: start;
}
.split > div:first-child p { font-size: 18px; max-width: 34em; }

.loop {
  padding: 28px 28px 20px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: 0 30px 70px -40px rgba(113, 105, 168, 0.7);
}
.loop__title {
  font: 500 13px/1 var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-3) !important;
  margin-bottom: 22px;
}
.loop ol {
  list-style: none;
  margin: 0; padding: 0;
  counter-reset: step;
}
.loop li {
  counter-increment: step;
  position: relative;
  display: grid;
  grid-template-columns: 34px 1fr;
  column-gap: 16px;
  padding-bottom: 18px;
}
.loop li::before {
  content: counter(step);
  grid-row: span 2;
  width: 34px; height: 34px;
  display: grid; place-items: center;
  border-radius: 10px;
  font: 500 14px/1 var(--font-mono);
  color: var(--violet);
  background: rgba(146, 131, 245, 0.12);
  border: 1px solid rgba(146, 131, 245, 0.35);
  position: relative; z-index: 1;
}
.loop li:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 16.5px; top: 34px; bottom: 0;
  width: 1px;
  background: linear-gradient(var(--line), rgba(96, 101, 120, 0.15));
}
.loop b { font-weight: 600; font-size: 16px; line-height: 1.3; padding-top: 1px; }
.loop span { font-size: 14px; color: var(--text-2); line-height: 1.4; }
.loop li.is-human::before {
  color: #0a0e1a;
  background: var(--green);
  border-color: var(--green);
  box-shadow: 0 0 18px rgba(74, 222, 128, 0.45);
}
.loop li.is-human b::after {
  content: "human";
  margin-left: 8px;
  padding: 2px 7px;
  border-radius: 6px;
  font: 500 11px/1 var(--font-mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  vertical-align: 2px;
  color: var(--green);
  border: 1px solid rgba(74, 222, 128, 0.4);
}

/* ---------- Principles ---------- */

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 48px;
}
.card {
  padding: 28px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line-soft);
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.card:hover { border-color: rgba(146, 131, 245, 0.5); transform: translateY(-2px); }
.card svg {
  width: 40px; height: 40px;
  padding: 8px;
  margin-bottom: 20px;
  border-radius: 10px;
  fill: none;
  stroke: var(--cyan);
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
  background: linear-gradient(135deg, rgba(56, 217, 255, 0.14), rgba(47, 107, 255, 0.14));
  border: 1px solid rgba(56, 217, 255, 0.22);
}
.card h3 { font-size: 20px; font-weight: 600; margin-bottom: 10px; }
.card p { font-size: 15px; margin: 0; }

/* ---------- Status ---------- */

.progress { margin-bottom: 48px; }
.progress__bar {
  display: grid;
  grid-template-columns: repeat(36, 1fr);
  gap: 4px;
}
.progress .s {
  height: 14px;
  border-radius: 4px;
  background: rgba(174, 181, 200, 0.07);
  box-shadow: inset 0 0 0 1px rgba(96, 101, 120, 0.35);
}
.progress .s.done {
  background: linear-gradient(180deg, #a497ff, var(--violet-deep));
  box-shadow: none;
}
.progress .s.now {
  background: var(--amber);
  box-shadow: 0 0 16px rgba(255, 200, 87, 0.6);
  animation: pulse 2.4s ease-in-out infinite;
}
.progress__legend {
  display: flex; flex-wrap: wrap; gap: 8px 24px;
  margin-top: 14px;
  font: 500 13px/1.4 var(--font-mono);
  color: var(--text-2);
}
.progress__legend span { display: inline-flex; align-items: center; gap: 8px; }
.k {
  width: 12px; height: 12px; border-radius: 3px;
  background: rgba(174, 181, 200, 0.07);
  box-shadow: inset 0 0 0 1px rgba(96, 101, 120, 0.5);
}
.k.done { background: var(--violet); box-shadow: none; }
.k.now { background: var(--amber); box-shadow: none; }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.55; }
}

.status {
  display: grid;
  grid-template-columns: 1.15fr 1fr 0.85fr;
  gap: 18px;
}
.status__col {
  padding: 28px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line-soft);
}
.status__col--ok { border-top: 2px solid var(--green); }
.status__col--now { border-top: 2px solid var(--amber); }
.status__col--not { border-top: 2px solid var(--text-3); background: rgba(52, 61, 80, 0.22); }
.status h3 {
  display: flex; align-items: center; gap: 10px;
  font-size: 19px;
  font-weight: 600;
  margin-bottom: 18px;
}
.status ul { list-style: none; margin: 0; padding: 0; }
.status li {
  position: relative;
  padding-left: 22px;
  margin-bottom: 14px;
  font-size: 15px;
  line-height: 1.55;
  color: var(--text-2);
}
.status li:last-child { margin-bottom: 0; }
.status li b { color: var(--text); font-weight: 600; }
.status li::before {
  content: "";
  position: absolute; left: 2px; top: 0.6em;
  width: 7px; height: 7px;
  border-radius: 2px;
  transform: rotate(45deg);
  background: var(--text-3);
}
.status__col--ok li::before { background: var(--green); }
.status__col--now li::before { background: var(--amber); }

/* ---------- Roadmap ---------- */

.timeline {
  list-style: none;
  margin: 48px 0 0; padding: 0;
  position: relative;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 9px; top: 10px; bottom: 10px;
  width: 2px;
  background: linear-gradient(var(--violet), var(--violet) 78%, var(--amber));
  opacity: 0.6;
}
.timeline li {
  position: relative;
  display: grid;
  grid-template-columns: 170px 1fr;
  column-gap: 24px;
  padding: 0 0 34px 48px;
}
.timeline li::before {
  content: "";
  position: absolute; left: 2px; top: 6px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--bg-tint);
  border: 2px solid var(--violet);
}
.timeline li.done::before { background: var(--violet); box-shadow: 0 0 0 4px rgba(146, 131, 245, 0.18); }
.timeline li.now::before {
  border-color: var(--amber);
  background: var(--amber);
  box-shadow: 0 0 0 5px rgba(255, 200, 87, 0.18), 0 0 18px rgba(255, 200, 87, 0.55);
}
.timeline__stages {
  grid-row: span 2;
  font: 500 13px/1.9 var(--font-mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-3);
}
.timeline li.now .timeline__stages { color: var(--amber); }
.timeline h3 { font-size: 21px; font-weight: 600; margin-bottom: 6px; }
.timeline p { font-size: 15px; margin: 0; max-width: 44em; }

.next__title {
  font: 500 13px/1 var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-3);
  margin: 24px 0 18px;
}
/* Stage 30 is the featured tile; the other six fill a 3 x 2 block beside it. */
.next {
  display: grid;
  grid-template-columns: 1.3fr repeat(3, 1fr);
  gap: 12px;
}
.next__item {
  display: flex; gap: 14px; align-items: flex-start;
  padding: 18px;
  border-radius: var(--radius-sm);
  border: 1px dashed rgba(96, 101, 120, 0.55);
  background: rgba(10, 14, 26, 0.45);
}
.next__item span {
  font: 600 22px/1 var(--font-display);
  color: transparent;
  -webkit-text-stroke: 1px var(--violet);
  min-width: 30px;
}
.next__item p { margin: 0; font-size: 14px; line-height: 1.45; color: var(--text); }
.next__item--lead {
  grid-row: span 2;
  flex-direction: column;
  justify-content: space-between;
  gap: 24px;
  padding: 24px;
  border-style: solid;
  border-color: rgba(56, 217, 255, 0.45);
  background:
    radial-gradient(260px 180px at 0% 0%, rgba(56, 217, 255, 0.14), transparent 70%),
    rgba(10, 14, 26, 0.55);
}
.next__item--lead span { font-size: 44px; -webkit-text-stroke-color: var(--cyan); }
.next__item--lead p { font: 600 19px/1.3 var(--font-display); }
.next__item--lead small {
  display: block;
  margin-bottom: 8px;
  font: 500 12px/1 var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cyan);
}

/* ---------- Gallery ---------- */

.gallery {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.gallery figure { margin: 0; }
.gallery a { display: block; border-radius: var(--radius); }
.gallery img {
  transition: transform 0.25s ease;
  border-radius: var(--radius);
  border: 1px solid rgba(123, 124, 145, 0.4);
  box-shadow: 0 30px 70px -35px rgba(4, 7, 16, 1), 0 0 60px -20px rgba(113, 105, 168, 0.45);
}
.gallery a:hover img { transform: translateY(-3px); }
.gallery figcaption {
  margin-top: 14px;
  font: 500 13px/1 var(--font-mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-3);
}

/* ---------- Footer ---------- */

.footer {
  padding: 48px 0 56px;
  border-top: 1px solid var(--line-soft);
  background:
    radial-gradient(700px 260px at 15% 100%, rgba(56, 217, 255, 0.07), transparent 70%),
    radial-gradient(700px 260px at 85% 100%, rgba(242, 155, 189, 0.07), transparent 70%);
}
.footer__inner {
  display: flex; justify-content: space-between; align-items: center;
  gap: 32px; flex-wrap: wrap;
}
.brand--footer { align-items: center; gap: 14px; font: inherit; letter-spacing: 0; }
.brand--footer strong { display: block; font: 700 17px/1.2 var(--font-display); letter-spacing: 0.04em; }
.brand--footer span { font-size: 14px; color: var(--text-2); }
.footer p { margin: 0; font-size: 13px; color: var(--text-3); text-align: right; line-height: 1.7; }

/* ---------- Responsive ---------- */

@media (max-width: 1080px) {
  .stats { grid-template-columns: repeat(6, 1fr); }
  .stats > div { grid-column: span 2; }
  .stats > div:nth-child(n+4) { grid-column: span 3; }
  .status { grid-template-columns: 1fr 1fr; }
  .status__col--not { grid-column: 1 / -1; }
  .cards { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 960px) {
  .hero { padding-top: 56px; }
  .hero__inner, .split { grid-template-columns: 1fr; gap: 48px; }
  .hero__logo { left: auto; right: 16px; bottom: auto; top: -36px; width: 84px; height: 84px; }
  .hero__visual figcaption { text-align: left; }
  .gallery { grid-template-columns: 1fr; }
  .next { grid-template-columns: 1fr 1fr; }
  .next__item--lead { grid-column: 1 / -1; grid-row: auto; flex-direction: row; align-items: center; }
  .nav__links { display: none; }
  .nav .chip { margin-left: auto; }
}

@media (max-width: 680px) {
  body { font-size: 16px; }
  .container { padding: 0 16px; }
  .section { padding: 80px 0; }
  .lead { font-size: 17px; }
  .stats { grid-template-columns: 1fr 1fr; margin-top: 56px; }
  .stats > div, .stats > div:nth-child(n+4) { grid-column: auto; padding: 18px; }
  .stats > div:first-child { grid-column: 1 / -1; }
  .stats dt { font-size: 24px; }
  .cards, .status, .next { grid-template-columns: 1fr; }
  .next__item--lead span { font-size: 36px; }
  .progress__bar { gap: 2px; }
  .progress .s { height: 12px; border-radius: 2px; }
  .timeline li { grid-template-columns: 1fr; padding-left: 40px; }
  .timeline__stages { grid-row: auto; margin-bottom: 2px; }
  .footer p { text-align: left; }
  .loop { padding: 22px 18px 14px; }
  .card, .status__col { padding: 22px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}