/* SalmonLauncher website — design system
   Aesthetic: technical editorial / instrument panel
   Copyright (C) 2026 Hugo Mou — GPL-3.0-or-later */

/* ---------- fonts (self-hosted latin subsets) ---------- */
@font-face {
  font-family: "Bricolage Grotesque";
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url("../fonts/bricolage.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA,
    U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191,
    U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "IBM Plex Sans";
  font-style: normal;
  font-weight: 400 600;
  font-display: swap;
  src: url("../fonts/plex-sans.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6,
    U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122,
    U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("../fonts/plex-mono-400.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6,
    U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122,
    U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("../fonts/plex-mono-500.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6,
    U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122,
    U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

/* ---------- tokens ---------- */
:root {
  --ink: #0b0d10;
  --ink-2: #0e1116;
  --panel: #12151a;
  --panel-2: #171b21;
  --panel-3: #1c2129;
  --line: rgba(255, 255, 255, 0.09);
  --line-strong: rgba(255, 255, 255, 0.17);
  --text: #e9ebee;
  --muted: #9198a3;
  --dim: #626a75;
  --salmon: #ff6f5e;
  --salmon-2: #ff9c8f;
  --salmon-soft: rgba(255, 111, 94, 0.13);
  --green: #7fd1a5;
  --amber: #e8c27a;
  --display: "Bricolage Grotesque", "Noto Sans SC", "Noto Sans TC",
    "PingFang SC", "PingFang TC", "Microsoft YaHei", "Microsoft JhengHei",
    "Hiragino Sans", "Yu Gothic UI", "Meiryo", sans-serif;
  --body: "IBM Plex Sans", "Noto Sans SC", "Noto Sans TC", "PingFang SC",
    "PingFang TC", "Microsoft YaHei", "Microsoft JhengHei", "Hiragino Sans",
    "Yu Gothic UI", "Meiryo", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "Cascadia Mono", Consolas,
    "Microsoft YaHei", "Microsoft JhengHei", "Yu Gothic UI", monospace;
  --r: 2px;
  --pad: clamp(20px, 4vw, 40px);
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-panel: 0 34px 80px -50px rgba(0, 0, 0, 0.95);
}

/* ---------- reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  overflow-x: clip;
}
body {
  margin: 0;
  background: var(--ink);
  color: var(--text);
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
}
button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}
h1,
h2,
h3,
h4 {
  font-family: var(--display);
  font-weight: 600;
  line-height: 1.02;
  letter-spacing: -0.03em;
  margin: 0;
}
p {
  margin: 0;
}
ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}
::selection {
  background: var(--salmon);
  color: var(--ink);
}
:focus-visible {
  outline: 2px solid var(--salmon);
  outline-offset: 3px;
}

/* ---------- background layers ---------- */
.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background-image: linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 88px 88px;
  opacity: 0.28;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 10%, transparent 78%);
  -webkit-mask-image: radial-gradient(
    ellipse 80% 60% at 50% 0%,
    #000 10%,
    transparent 78%
  );
}
.bg-glow {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: radial-gradient(
      720px 460px at 12% -6%,
      rgba(255, 111, 94, 0.16),
      transparent 62%
    ),
    radial-gradient(
      900px 520px at 96% 8%,
      rgba(127, 209, 165, 0.06),
      transparent 60%
    ),
    linear-gradient(180deg, transparent 0%, var(--ink) 62%);
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 9998;
  pointer-events: none;
  opacity: 0.5;
  mix-blend-mode: soft-light;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.35'/%3E%3C/svg%3E");
}

/* ---------- layout ---------- */
.wrap {
  width: 100%;
  max-width: 1220px;
  margin-inline: auto;
  padding-inline: var(--pad);
}
.wrap-narrow {
  width: 100%;
  max-width: 860px;
  margin-inline: auto;
  padding-inline: var(--pad);
}
main {
  position: relative;
  z-index: 1;
}

/* ---------- nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--line);
  background: rgba(11, 13, 16, 0.76);
  backdrop-filter: blur(16px) saturate(140%);
}
.nav-in {
  height: 64px;
  display: flex;
  align-items: center;
  gap: 30px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  flex-shrink: 0;
}
.brand img {
  width: 26px;
  height: 26px;
  image-rendering: pixelated;
  filter: drop-shadow(0 0 12px rgba(255, 111, 94, 0.35));
}
.brand-name {
  font-family: var(--display);
  font-weight: 600;
  font-size: 17px;
  letter-spacing: -0.02em;
  white-space: nowrap;
}
.brand-slash {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--dim);
  letter-spacing: 0.12em;
  border-left: 1px solid var(--line);
  padding-left: 11px;
  margin-left: 2px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}
.nav-links a {
  position: relative;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 8px 11px;
  border-radius: var(--r);
  transition: color 0.2s, background 0.2s;
}
.nav-links a:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
}
.nav-links a[aria-current="page"] {
  color: var(--text);
}
.nav-links a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 11px;
  right: 11px;
  bottom: 2px;
  height: 1px;
  background: var(--salmon);
}
.nav-tools {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-left: 18px;
  border-left: 1px solid var(--line);
}
.lang {
  display: flex;
  border: 1px solid var(--line);
  border-radius: var(--r);
  overflow: hidden;
}
.lang button {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  padding: 6px 9px;
  color: var(--dim);
  transition: color 0.2s, background 0.2s;
}
.lang button + button {
  border-left: 1px solid var(--line);
}
.lang button[aria-pressed="true"] {
  color: var(--ink);
  background: var(--salmon);
}
.lang button:hover:not([aria-pressed="true"]) {
  color: var(--text);
}
.burger {
  display: none;
  width: 38px;
  height: 34px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  align-items: center;
  justify-content: center;
}
.burger span {
  display: block;
  width: 16px;
  height: 1px;
  background: var(--text);
  position: relative;
}
.burger span::before,
.burger span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 1px;
  background: var(--text);
}
.burger span::before {
  top: -5px;
}
.burger span::after {
  top: 5px;
}
.mobile-menu {
  display: none;
  border-bottom: 1px solid var(--line);
  background: var(--ink-2);
}
.mobile-menu.open {
  display: block;
}
.mobile-menu a {
  display: block;
  padding: 15px var(--pad);
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

/* ---------- typography helpers ---------- */
.mono {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dim);
}
.eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--salmon);
  flex-shrink: 0;
}
.lede {
  color: var(--muted);
  font-size: clamp(15px, 1.35vw, 17.5px);
  line-height: 1.72;
}
.mark {
  color: var(--salmon);
}
.dim {
  color: var(--dim);
}
.hr {
  height: 1px;
  background: var(--line);
  border: 0;
  margin: 0;
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 20px;
  border: 1px solid transparent;
  border-radius: var(--r);
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  white-space: nowrap;
  transition: transform 0.25s var(--ease), background 0.2s, border-color 0.2s,
    color 0.2s, box-shadow 0.3s;
}
.btn svg {
  width: 13px;
  height: 13px;
  flex-shrink: 0;
}
.btn-primary {
  background: var(--salmon);
  color: #0a0b0e;
  box-shadow: 0 12px 40px -16px rgba(255, 111, 94, 0.7);
}
.btn-primary:hover {
  background: #ff8677;
  transform: translateY(-2px);
  box-shadow: 0 18px 48px -16px rgba(255, 111, 94, 0.8);
}
.btn-ghost {
  border-color: var(--line-strong);
  color: var(--text);
}
.btn-ghost:hover {
  border-color: var(--salmon);
  color: var(--salmon);
  transform: translateY(-2px);
}
.btn-sm {
  padding: 8px 13px;
  font-size: 9.5px;
  letter-spacing: 0.1em;
}
.btn-lg {
  padding: 16px 26px;
  font-size: 11px;
}
.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}
.link-arrow {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--salmon);
  display: inline-flex;
  align-items: center;
  gap: 7px;
  border-bottom: 1px solid transparent;
  transition: gap 0.25s var(--ease), border-color 0.25s;
}
.link-arrow:hover {
  gap: 12px;
  border-bottom-color: rgba(255, 111, 94, 0.5);
}

/* ---------- hero ---------- */
.hero {
  padding: clamp(56px, 9vw, 104px) 0 clamp(46px, 6vw, 76px);
  display: grid;
  grid-template-columns: 1.04fr 0.96fr;
  gap: clamp(36px, 5vw, 72px);
  align-items: center;
}
.hero-copy > * {
  opacity: 0;
  animation: rise 0.9s var(--ease) forwards;
}
.hero-copy > *:nth-child(1) {
  animation-delay: 0.06s;
}
.hero-copy > *:nth-child(2) {
  animation-delay: 0.13s;
}
.hero-copy > *:nth-child(3) {
  animation-delay: 0.2s;
}
.hero-copy > *:nth-child(4) {
  animation-delay: 0.27s;
}
.hero-copy > *:nth-child(5) {
  animation-delay: 0.34s;
}
@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(22px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}
.hero h1 {
  margin: 22px 0 26px;
  font-size: clamp(44px, 5.6vw, 82px);
  line-height: 0.95;
  letter-spacing: -0.04em;
}
.hero h1 .line2 {
  display: block;
  color: var(--muted);
}
.hero .lede {
  max-width: 46ch;
}
.hero .btn-row {
  margin-top: 34px;
}
.hero-meta {
  margin-top: 26px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--dim);
}
.hero-meta li {
  display: flex;
  align-items: center;
  gap: 16px;
}
.hero-meta li + li::before {
  content: "·";
  color: var(--dim);
}
.hero-meta b {
  color: var(--muted);
  font-weight: 400;
}

/* ---------- launcher mockup ---------- */
.mock-stage {
  position: relative;
  opacity: 0;
  animation: rise 1s var(--ease) 0.3s forwards;
}
.mock-stage::before {
  content: "";
  position: absolute;
  inset: -34px -26px;
  background: radial-gradient(
    ellipse at 62% 38%,
    rgba(255, 111, 94, 0.22),
    transparent 66%
  );
  filter: blur(12px);
  z-index: -1;
}
.mock {
  position: relative;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--panel);
  overflow: hidden;
  box-shadow: 0 40px 90px -40px rgba(0, 0, 0, 0.9),
    0 0 0 1px rgba(0, 0, 0, 0.4);
}
.mock::before,
.mock::after {
  content: "";
  position: absolute;
  width: 10px;
  height: 10px;
  border-color: var(--salmon);
  border-style: solid;
  z-index: 3;
  opacity: 0.8;
}
.mock::before {
  top: -1px;
  left: -1px;
  border-width: 1px 0 0 1px;
}
.mock::after {
  bottom: -1px;
  right: -1px;
  border-width: 0 1px 1px 0;
}
.mock-bar {
  height: 34px;
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 0 10px;
  background: #0e1014;
  border-bottom: 1px solid var(--line);
}
.mock-logo {
  width: 16px;
  height: 16px;
  image-rendering: pixelated;
  opacity: 0.95;
}
.mock-bar-title {
  font-family: var(--mono);
  font-size: 9.5px;
  color: var(--muted);
  letter-spacing: 0.06em;
}
.mock-bar-title b {
  color: var(--text);
  font-weight: 500;
}
.mock-win {
  margin-left: auto;
  display: flex;
  gap: 14px;
  padding-right: 2px;
}
.mock-win i {
  width: 8px;
  height: 8px;
  border: 1px solid var(--dim);
  opacity: 0.7;
}
.mock-win i:nth-child(2) {
  border-width: 1px 0 0 0;
  height: 6px;
}
.mock-win i:nth-child(3) {
  border: 0;
  position: relative;
}
.mock-win i:nth-child(3)::before,
.mock-win i:nth-child(3)::after {
  content: "";
  position: absolute;
  inset: 3px 0;
  border-top: 1px solid var(--dim);
  transform: rotate(45deg);
}
.mock-win i:nth-child(3)::after {
  transform: rotate(-45deg);
}
.mock-body {
  display: grid;
  grid-template-columns: 156px 1fr;
  min-height: 320px;
}
.mock-side {
  border-right: 1px solid var(--line);
  background: #0f1216;
  padding: 12px 9px;
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.mock-side-label {
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.16em;
  color: var(--dim);
  padding: 10px 7px 5px;
}
.mock-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  border-radius: 3px;
  font-size: 10.5px;
  color: var(--muted);
}
.mock-nav i {
  width: 3px;
  height: 3px;
  background: var(--dim);
  border-radius: 50%;
}
.mock-nav.active {
  background: var(--salmon-soft);
  color: var(--text);
}
.mock-nav.active i {
  background: var(--salmon);
  box-shadow: 0 0 8px var(--salmon);
}
.mock-inst {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 6px 8px;
  font-size: 10.5px;
  color: var(--muted);
  border-radius: 3px;
}
.mock-inst span {
  font-family: var(--mono);
  font-size: 8px;
  color: var(--dim);
}
.mock-inst.on {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
}
.mock-java {
  margin-top: auto;
  font-family: var(--mono);
  font-size: 8.5px;
  color: var(--dim);
  padding: 10px 7px 4px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
}
.mock-java b {
  color: var(--green);
  font-weight: 400;
}
.mock-main {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
}
.mock-hero {
  border: 1px solid var(--line);
  background: linear-gradient(160deg, #191d24, #12151a 62%);
  padding: 16px;
  position: relative;
  overflow: hidden;
}
.mock-hero::before {
  content: "";
  position: absolute;
  right: -40px;
  top: -40px;
  width: 150px;
  height: 150px;
  background: radial-gradient(circle, rgba(255, 111, 94, 0.16), transparent 65%);
}
.mock-hero-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
.mock-chip {
  font-family: var(--mono);
  font-size: 7.5px;
  letter-spacing: 0.14em;
  color: var(--green);
  border: 1px solid rgba(127, 209, 165, 0.3);
  padding: 2px 6px;
  border-radius: 2px;
}
.mock-hero-name {
  font-family: var(--display);
  font-size: 38px;
  line-height: 1;
  letter-spacing: -0.04em;
  margin: 12px 0 6px;
}
.mock-hero-sub {
  font-family: var(--mono);
  font-size: 9px;
  color: var(--dim);
  letter-spacing: 0.05em;
}
.mock-play {
  margin-top: 16px;
  width: 100%;
  background: var(--salmon);
  color: #0a0b0e;
  font-family: var(--mono);
  font-size: 9.5px;
  font-weight: 500;
  letter-spacing: 0.16em;
  padding: 9px;
  border-radius: 2px;
  text-align: center;
}
.mock-progress {
  height: 3px;
  background: rgba(255, 255, 255, 0.07);
  position: relative;
  overflow: hidden;
}
.mock-progress span {
  position: absolute;
  inset: 0 36% 0 0;
  background: linear-gradient(90deg, var(--salmon), #ffb4a9);
}
.mock-progress span::after {
  content: "";
  position: absolute;
  right: 0;
  top: -2px;
  width: 2px;
  height: 7px;
  background: #fff;
  box-shadow: 0 0 8px var(--salmon);
  animation: pulse 1.8s ease-in-out infinite;
}
@keyframes pulse {
  50% {
    opacity: 0.3;
  }
}
.mock-log {
  font-family: var(--mono);
  font-size: 9px;
  line-height: 1.9;
  color: var(--muted);
  letter-spacing: 0.02em;
  border: 1px solid var(--line);
  background: #0c0f13;
  padding: 10px 12px;
  flex: 1;
  min-height: 96px;
  overflow: hidden;
}
.mock-log b {
  color: var(--dim);
  font-weight: 400;
}
.mock-log .ok b {
  color: var(--green);
}
.mock-log .ok {
  color: var(--text);
}
.mock-log .warn b {
  color: var(--amber);
}

/* ---------- fact strip ---------- */
.facts {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.fact {
  padding: 26px 0 26px 26px;
  border-left: 1px solid var(--line);
}
.fact:first-child {
  border-left: 0;
  padding-left: 0;
}
.fact dt {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.16em;
  color: var(--dim);
  text-transform: uppercase;
  margin-bottom: 7px;
}
.fact dd {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(20px, 2.1vw, 27px);
  letter-spacing: -0.02em;
  line-height: 1.1;
}
.fact dd small {
  font-family: var(--body);
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0;
  display: block;
  margin-top: 4px;
}

/* ---------- section ---------- */
.sec {
  padding: clamp(56px, 7vw, 92px) 0 0;
}
.sec-head {
  display: flex;
  align-items: baseline;
  gap: 18px;
  margin-bottom: 38px;
}
.sec-num {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--salmon);
  white-space: nowrap;
}
.sec-head h2 {
  font-size: clamp(26px, 3.4vw, 42px);
  letter-spacing: -0.035em;
  flex-shrink: 0;
}
.sec-line {
  flex: 1;
  height: 1px;
  background: var(--line);
  align-self: center;
  margin-top: 6px;
}
.sec-head .mono {
  white-space: nowrap;
}
.sec-intro {
  max-width: 58ch;
  color: var(--muted);
  margin: -18px 0 42px;
}

/* ---------- cards ---------- */
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.card {
  position: relative;
  background: var(--ink-2);
  padding: 28px 26px 30px;
  min-height: 220px;
  transition: background 0.3s;
}
.card:hover {
  background: var(--panel);
}
.card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--salmon);
  transition: width 0.45s var(--ease);
}
.card:hover::after {
  width: 100%;
}
.card-num {
  position: absolute;
  top: 22px;
  right: 22px;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--dim);
  letter-spacing: 0.1em;
}
.card h3 {
  font-size: 21px;
  margin-bottom: 12px;
  max-width: 16ch;
}
.card p {
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--muted);
}
.card-tag {
  display: inline-block;
  margin-bottom: 34px;
  font-family: var(--mono);
  font-size: 8.5px;
  letter-spacing: 0.15em;
  color: var(--salmon);
  border: 1px solid rgba(255, 111, 94, 0.25);
  padding: 3px 6px;
  border-radius: 2px;
}

/* ---------- feature rows ---------- */
.feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(30px, 5vw, 64px);
  align-items: center;
  padding: clamp(40px, 5vw, 62px) 0;
  border-top: 1px solid var(--line);
}
.feature.rev .feature-visual {
  order: -1;
}
.feature-copy .mono {
  display: block;
  margin-bottom: 14px;
}
.feature-copy h2,
.feature-copy h3 {
  font-size: clamp(23px, 2.6vw, 33px);
  margin-bottom: 16px;
  max-width: 22ch;
}
.feature-copy p {
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.75;
  max-width: 48ch;
}
.checks {
  margin-top: 22px;
  display: grid;
  gap: 9px;
}
.checks li {
  display: flex;
  gap: 10px;
  font-size: 13px;
  color: var(--muted);
  align-items: flex-start;
}
.checks li::before {
  content: "";
  width: 10px;
  height: 10px;
  margin-top: 4px;
  flex-shrink: 0;
  border: 1px solid var(--line-strong);
  background: linear-gradient(
    135deg,
    transparent 46%,
    var(--green) 46% 54%,
    transparent 54%
  );
}

/* visual panels */
.viz {
  border: 1px solid var(--line);
  background: linear-gradient(160deg, var(--panel-2), var(--ink-2));
  padding: 20px;
  min-height: 258px;
  position: relative;
  overflow: hidden;
}
.viz::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 12px;
  height: 1px;
  background: var(--salmon);
  box-shadow: 0 0 20px 2px rgba(255, 111, 94, 0.4);
}
.viz-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.12em;
  color: var(--dim);
  text-transform: uppercase;
}
.viz-head b {
  color: var(--green);
  font-weight: 400;
}
.pipe-row {
  display: grid;
  grid-template-columns: 22px 1fr auto;
  gap: 10px;
  align-items: center;
  padding: 9px 0;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.06);
  font-size: 11px;
  color: var(--muted);
}
.pipe-row:last-child {
  border-bottom: 0;
}
.pipe-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  border: 1px solid var(--line-strong);
  position: relative;
}
.pipe-row.done .pipe-dot {
  background: var(--green);
  border-color: var(--green);
}
.pipe-row.done .pipe-dot::after {
  content: "";
  position: absolute;
  inset: -4px;
  border: 1px solid rgba(127, 209, 165, 0.25);
  border-radius: 50%;
}
.pipe-row.now .pipe-dot {
  background: var(--salmon);
  border-color: var(--salmon);
  box-shadow: 0 0 10px var(--salmon);
}
.pipe-row span:last-child {
  font-family: var(--mono);
  font-size: 9px;
  color: var(--dim);
  letter-spacing: 0.06em;
}
.pipe-row.done span:last-child {
  color: var(--green);
}
.pipe-row.now span:last-child {
  color: var(--salmon);
}
.modrow {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 11px;
  color: var(--muted);
}
.modrow:last-child {
  border-bottom: 0;
}
.modrow .mod-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.modrow .mod-ver {
  font-family: var(--mono);
  font-size: 8.5px;
  color: var(--dim);
}
.switch {
  width: 24px;
  height: 12px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  position: relative;
  flex-shrink: 0;
}
.switch::after {
  content: "";
  position: absolute;
  left: 1px;
  top: 1px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--dim);
}
.switch.on {
  border-color: rgba(127, 209, 165, 0.5);
  background: rgba(127, 209, 165, 0.1);
}
.switch.on::after {
  left: 13px;
  background: var(--green);
}
.relay {
  position: relative;
  height: 190px;
}
.relay-node {
  position: absolute;
  border: 1px solid var(--line-strong);
  background: var(--panel-3);
  padding: 8px 10px;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.06em;
  color: var(--muted);
  border-radius: 2px;
}
.relay-node b {
  display: block;
  font-family: var(--body);
  font-size: 11px;
  font-weight: 500;
  color: var(--text);
  letter-spacing: 0;
  margin-bottom: 2px;
}
.relay-node.hub {
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  border-color: rgba(255, 111, 94, 0.5);
  background: var(--salmon-soft);
  color: var(--salmon);
  min-width: 92px;
  text-align: center;
}
.relay-node.hub b {
  color: var(--text);
}
.relay-node.n1 {
  left: 0;
  top: 8px;
}
.relay-node.n2 {
  right: 0;
  top: 8px;
}
.relay-node.n3 {
  left: 0;
  bottom: 6px;
}
.relay-node.n4 {
  right: 0;
  bottom: 6px;
}
.relay svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.loglines {
  font-family: var(--mono);
  font-size: 10px;
  line-height: 2.1;
  color: var(--muted);
  letter-spacing: 0.01em;
}
.loglines div {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.loglines .t {
  color: var(--dim);
  margin-right: 8px;
}
.loglines .err {
  color: var(--salmon);
}
.loglines .ok {
  color: var(--green);
}
.diag-box {
  margin-top: 14px;
  border: 1px solid rgba(255, 111, 94, 0.3);
  background: rgba(255, 111, 94, 0.05);
  padding: 11px 12px;
  font-size: 11.5px;
  color: var(--text);
}
.diag-box b {
  display: block;
  font-family: var(--mono);
  font-size: 8.5px;
  letter-spacing: 0.14em;
  color: var(--salmon);
  margin-bottom: 4px;
}
.diag-box span {
  color: var(--muted);
}
.theme-swatches {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 8px;
  margin-bottom: 18px;
}
.swatch {
  aspect-ratio: 1;
  border: 1px solid var(--line);
  background: var(--c);
  position: relative;
}
.swatch.on::after {
  content: "";
  position: absolute;
  inset: -3px;
  border: 1px solid var(--salmon);
}
.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.chip {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.06em;
  color: var(--muted);
  border: 1px solid var(--line);
  padding: 4px 8px;
  border-radius: 2px;
}
.chip.on {
  color: var(--ink);
  background: var(--text);
  border-color: var(--text);
}

/* ---------- split CTA ---------- */
.cta-band {
  margin-top: clamp(56px, 7vw, 92px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: clamp(44px, 6vw, 70px) 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  background: linear-gradient(100deg, rgba(255, 111, 94, 0.07), transparent 55%);
}
.cta-band h2 {
  font-size: clamp(25px, 3.2vw, 40px);
  margin: 8px 0 0;
}
.cta-band p {
  color: var(--muted);
  margin-top: 8px;
  font-size: 14px;
}

/* ---------- page header ---------- */
.phead {
  padding: clamp(52px, 7vw, 86px) 0 clamp(30px, 4vw, 48px);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 30px;
  align-items: end;
  border-bottom: 1px solid var(--line);
}
.phead h1 {
  font-size: clamp(36px, 5vw, 64px);
  margin: 16px 0 18px;
  letter-spacing: -0.04em;
}
.phead .lede {
  max-width: 56ch;
}
.phead-aside {
  text-align: right;
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.12em;
  color: var(--dim);
  line-height: 2;
  text-transform: uppercase;
}
.phead-aside b {
  color: var(--salmon);
  font-weight: 400;
}

/* ---------- download ---------- */
.release {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  margin-bottom: 34px;
}
.release .ver {
  font-family: var(--display);
  font-size: 30px;
  letter-spacing: -0.03em;
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 8.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--green);
  border: 1px solid rgba(127, 209, 165, 0.3);
  background: rgba(127, 209, 165, 0.06);
  padding: 4px 8px;
  border-radius: 2px;
}
.badge::before {
  content: "";
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--green);
}
.dl-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.dl-card {
  border: 1px solid var(--line);
  background: var(--ink-2);
  padding: 26px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: border-color 0.25s;
}
.dl-card:hover {
  border-color: var(--line-strong);
}
.dl-card.rec {
  border-color: rgba(255, 111, 94, 0.35);
  background: linear-gradient(170deg, rgba(255, 111, 94, 0.06), var(--ink-2) 55%);
}
.dl-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 6px;
}
.dl-card h3 {
  font-size: 22px;
  letter-spacing: -0.02em;
}
.dl-file {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--muted);
  letter-spacing: 0.02em;
  word-break: break-all;
  margin: 8px 0 4px;
}
.dl-note {
  font-size: 12.5px;
  color: var(--dim);
  margin-bottom: 20px;
}
.dl-meta {
  display: flex;
  gap: 18px;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.08em;
  color: var(--dim);
  margin-bottom: 18px;
  border-top: 1px solid var(--line);
  padding-top: 14px;
}
.dl-meta b {
  color: var(--muted);
  font-weight: 400;
}
.dl-card .btn {
  margin-top: auto;
  width: 100%;
}
.hash {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
}
.hash code {
  flex: 1;
  font-family: var(--mono);
  font-size: 9px;
  color: var(--dim);
  line-height: 1.5;
  word-break: break-all;
}
.copy {
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.1em;
  color: var(--muted);
  border: 1px solid var(--line);
  padding: 4px 7px;
  border-radius: 2px;
  flex-shrink: 0;
  transition: 0.2s;
}
.copy:hover {
  border-color: var(--salmon);
  color: var(--salmon);
}
.copy.done {
  color: var(--green);
  border-color: rgba(127, 209, 165, 0.4);
}
.dl-foot {
  margin-top: 16px;
  font-family: var(--mono);
  font-size: 9.5px;
  color: var(--dim);
  letter-spacing: 0.04em;
  line-height: 1.9;
}
.req-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-top: 10px;
}
.req {
  background: var(--ink-2);
  padding: 24px 26px;
}
.req h3 {
  font-size: 16px;
  margin-bottom: 10px;
  font-family: var(--body);
  font-weight: 600;
  letter-spacing: 0;
}
.req ul {
  display: grid;
  gap: 7px;
}
.req li {
  font-size: 13px;
  color: var(--muted);
  padding-left: 14px;
  position: relative;
}
.req li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 5px;
  height: 1px;
  background: var(--dim);
}

/* ---------- code ---------- */
.code {
  position: relative;
  border: 1px solid var(--line);
  background: #0c0f13;
  margin: 18px 0;
  overflow: hidden;
}
.code-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 8px 12px;
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 8.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--dim);
}
.code pre {
  margin: 0;
  padding: 15px 16px;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 11.5px;
  line-height: 1.8;
  color: var(--text);
  tab-size: 2;
}
.code pre .c {
  color: var(--dim);
}
.code pre .s {
  color: var(--green);
}
.code pre .k {
  color: var(--salmon);
}
.copy-inline {
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.1em;
  color: var(--dim);
  transition: color 0.2s;
}
.copy-inline:hover {
  color: var(--salmon);
}

/* ---------- notes ---------- */
.note {
  border-left: 2px solid var(--salmon);
  background: rgba(255, 111, 94, 0.05);
  padding: 16px 18px;
  margin: 22px 0;
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.7;
}
.note b {
  color: var(--text);
  font-weight: 600;
}
.note.green {
  border-left-color: var(--green);
  background: rgba(127, 209, 165, 0.05);
}
.note.plain {
  border-left-color: var(--line-strong);
  background: rgba(255, 255, 255, 0.03);
}

/* ---------- docs ---------- */
.doc-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: clamp(30px, 5vw, 64px);
  padding-top: 46px;
}
.doc-nav {
  position: sticky;
  top: 92px;
  align-self: start;
  border-left: 1px solid var(--line);
  padding-left: 16px;
}
.doc-nav .mono {
  display: block;
  margin-bottom: 12px;
}
.doc-nav a {
  display: block;
  font-size: 12px;
  color: var(--dim);
  padding: 5px 0;
  transition: color 0.2s, padding 0.2s;
}
.doc-nav a:hover,
.doc-nav a.on {
  color: var(--text);
  padding-left: 4px;
}
.doc-nav a.on {
  color: var(--salmon);
}
.doc-body {
  max-width: 760px;
  padding-bottom: 40px;
}
.doc-body section {
  padding-bottom: 40px;
  margin-bottom: 40px;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: 90px;
}
.doc-body section:last-child {
  border-bottom: 0;
}
.doc-body h2 {
  font-size: clamp(23px, 2.5vw, 31px);
  margin-bottom: 16px;
  display: flex;
  align-items: baseline;
  gap: 12px;
}
.doc-body h2 .n {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--salmon);
  letter-spacing: 0.1em;
  font-weight: 400;
}
.doc-body h3 {
  font-size: 16.5px;
  font-family: var(--body);
  font-weight: 600;
  letter-spacing: 0;
  margin: 26px 0 10px;
}
.doc-body p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
  margin-bottom: 12px;
}
.doc-body p strong {
  color: var(--text);
  font-weight: 600;
}
.doc-body ul.list {
  display: grid;
  gap: 8px;
  margin: 14px 0 18px;
}
.doc-body ul.list li {
  font-size: 13.5px;
  color: var(--muted);
  padding-left: 18px;
  position: relative;
}
.doc-body ul.list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--dim);
}
.doc-body ol.steps {
  counter-reset: s;
  display: grid;
  gap: 12px;
  margin: 16px 0;
}
.doc-body ol.steps li {
  counter-increment: s;
  font-size: 13.5px;
  color: var(--muted);
  padding-left: 34px;
  position: relative;
  line-height: 1.7;
}
.doc-body ol.steps li::before {
  content: counter(s, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--salmon);
  border: 1px solid rgba(255, 111, 94, 0.3);
  padding: 1px 4px;
  line-height: 1.5;
}
.kbd {
  font-family: var(--mono);
  font-size: 10.5px;
  border: 1px solid var(--line-strong);
  border-bottom-width: 2px;
  border-radius: 3px;
  padding: 1px 5px;
  color: var(--text);
  white-space: nowrap;
}
.faq {
  border-top: 1px solid var(--line);
}
.faq details {
  border-bottom: 1px solid var(--line);
}
.faq summary {
  cursor: pointer;
  list-style: none;
  padding: 17px 0;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--text);
  display: flex;
  justify-content: space-between;
  gap: 20px;
}
.faq summary::-webkit-details-marker {
  display: none;
}
.faq summary::after {
  content: "+";
  font-family: var(--mono);
  color: var(--salmon);
  font-size: 13px;
}
.faq details[open] summary::after {
  content: "−";
}
.faq details p {
  padding: 0 0 18px;
  margin: 0;
  max-width: 65ch;
}

/* ---------- changelog ---------- */
.log {
  padding-top: 40px;
  border-left: 1px solid var(--line);
  margin-left: 6px;
}
.entry {
  position: relative;
  padding: 0 0 46px 34px;
}
.entry::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 5px;
  width: 7px;
  height: 7px;
  border: 1px solid var(--salmon);
  background: var(--ink);
  transform: rotate(45deg);
}
.entry-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}
.entry-head h2 {
  font-size: 25px;
  letter-spacing: -0.02em;
}
.entry-head time {
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.1em;
  color: var(--dim);
  text-transform: uppercase;
}
.entry-tag {
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.12em;
  color: var(--salmon);
  border: 1px solid rgba(255, 111, 94, 0.3);
  padding: 2px 6px;
}
.entry ul {
  display: grid;
  gap: 7px;
  margin-top: 12px;
}
.entry li {
  font-size: 13.5px;
  color: var(--muted);
  padding-left: 18px;
  position: relative;
  line-height: 1.7;
}
.entry li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 1px;
  background: var(--line-strong);
}

/* ---------- about ---------- */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(30px, 5vw, 70px);
  align-items: start;
}
.prose p {
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.85;
  margin-bottom: 14px;
}
.prose p strong {
  color: var(--text);
  font-weight: 600;
}
.stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.stat {
  background: var(--ink-2);
  padding: 22px;
}
.stat b {
  display: block;
  font-family: var(--display);
  font-size: 26px;
  letter-spacing: -0.03em;
  margin-bottom: 2px;
}
.stat span {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  color: var(--dim);
  text-transform: uppercase;
}
.legal {
  font-size: 12.5px;
  color: var(--dim);
  line-height: 1.85;
  border: 1px solid var(--line);
  padding: 24px 26px;
  background: rgba(255, 255, 255, 0.02);
  margin-top: 10px;
}
.legal b {
  color: var(--muted);
  font-weight: 600;
}

/* ---------- footer ---------- */
.footer {
  margin-top: clamp(56px, 7vw, 90px);
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, transparent, rgba(0, 0, 0, 0.35));
  padding: 50px 0 34px;
  position: relative;
  z-index: 1;
}
.foot-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 34px;
}
.foot-brand p {
  color: var(--dim);
  font-size: 12.5px;
  line-height: 1.8;
  max-width: 34ch;
  margin-top: 14px;
}
.foot-col h4 {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.16em;
  color: var(--dim);
  text-transform: uppercase;
  margin-bottom: 14px;
  font-weight: 400;
}
.foot-col a {
  display: block;
  font-size: 12.5px;
  color: var(--muted);
  padding: 4px 0;
  transition: color 0.2s;
}
.foot-col a:hover {
  color: var(--salmon);
}
.foot-base {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.06em;
  color: var(--dim);
  line-height: 1.9;
}

/* ---------- 404 ---------- */
.err-wrap {
  min-height: calc(100vh - 64px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 80px 20px;
}
.err-code {
  font-family: var(--display);
  font-size: clamp(90px, 22vw, 230px);
  line-height: 0.85;
  letter-spacing: -0.06em;
  color: var(--text);
}
.err-code span {
  color: var(--salmon);
}
.err-wrap h1 {
  font-size: clamp(20px, 3vw, 30px);
  margin: 28px 0 12px;
}
.err-wrap p {
  color: var(--muted);
  font-size: 14px;
  max-width: 46ch;
  margin-bottom: 30px;
}

/* ---------- reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
  transition-delay: calc(var(--i, 0) * 70ms);
}
.reveal.in {
  opacity: 1;
  transform: none;
}

/* ---------- responsive ---------- */
@media (max-width: 1080px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 44px;
  }
  .hero-copy {
    max-width: 640px;
  }
  .mock-stage {
    max-width: 620px;
  }
  .cards {
    grid-template-columns: 1fr 1fr;
  }
  .fact {
    padding-left: 18px;
  }
  .foot-grid {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 900px) {
  .nav-links {
    display: none;
  }
  .burger {
    display: flex;
  }
  .nav-in {
    gap: 14px;
  }
  .nav-tools {
    margin-left: auto;
    padding-left: 12px;
  }
  .brand-slash {
    display: none;
  }
  .feature {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .feature.rev .feature-visual {
    order: 0;
  }
  .doc-layout {
    grid-template-columns: 1fr;
  }
  .doc-nav {
    position: static;
    display: flex;
    flex-wrap: wrap;
    gap: 0 18px;
    border-left: 0;
    border-bottom: 1px solid var(--line);
    padding: 0 0 14px;
  }
  .doc-nav .mono {
    width: 100%;
  }
  .doc-nav a {
    padding: 4px 0;
  }
  .doc-nav a:hover,
  .doc-nav a.on {
    padding-left: 0;
  }
}
@media (max-width: 720px) {
  .phead {
    grid-template-columns: 1fr;
  }
  .phead-aside {
    display: none;
  }
  .facts {
    grid-template-columns: 1fr 1fr;
  }
  .fact {
    padding: 20px 0 20px 18px;
  }
  .fact:nth-child(odd) {
    border-left: 0;
    padding-left: 0;
  }
  .dl-grid,
  .req-grid,
  .two-col {
    grid-template-columns: 1fr;
  }
  .sec-head {
    flex-wrap: wrap;
  }
  .sec-line {
    display: none;
  }
  .cards {
    grid-template-columns: 1fr;
  }
  .card {
    min-height: 0;
  }
  .card-tag {
    margin-bottom: 22px;
  }
  .cta-band {
    flex-direction: column;
    align-items: flex-start;
  }
  .foot-grid {
    grid-template-columns: 1fr 1fr;
  }
  .hero h1 {
    font-size: clamp(38px, 10.5vw, 56px);
  }
  .hero-meta {
    gap: 6px 12px;
  }
  .hero-meta li {
    gap: 12px;
  }
  .mock-body {
    grid-template-columns: 112px 1fr;
    min-height: 280px;
  }
  .mock-hero-name {
    font-size: 28px;
  }
  .mock-side-label {
    font-size: 7px;
    padding-left: 5px;
  }
  .mock-inst span {
    display: none;
  }
  .viz {
    min-height: 0;
  }
}
@media (max-width: 460px) {
  .brand-name {
    display: none;
  }
  .fact dd {
    font-size: 18px;
  }
  .foot-grid {
    grid-template-columns: 1fr;
  }
  .btn {
    width: 100%;
  }
  .btn-row .btn {
    width: 100%;
  }
  .theme-swatches {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ---------- premium layer ---------- */
/* scroll progress */
.scroll-progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(
    90deg,
    var(--salmon),
    var(--salmon-2) 55%,
    var(--green)
  );
  z-index: 9999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}
.scroll-progress.on {
  opacity: 0.92;
}

/* nav states */
.nav {
  transition: background 0.3s, border-color 0.3s, box-shadow 0.3s;
}
.nav.scrolled {
  background: rgba(8, 10, 13, 0.92);
  border-bottom-color: var(--line-strong);
  box-shadow: 0 20px 44px -34px rgba(0, 0, 0, 0.95);
}
.nav-links a {
  transition: color 0.2s, background 0.2s;
}
.nav-links a[aria-current="page"]::after {
  background: linear-gradient(90deg, var(--salmon), var(--salmon-2));
  box-shadow: 0 0 12px rgba(255, 111, 94, 0.45);
}
.lang {
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}
.lang button[aria-pressed="true"] {
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.16);
}

/* display type */
h1,
h2 {
  text-wrap: balance;
}
.hero h1 {
  color: #f6f7f8;
}
.hero h1 .line2 {
  color: var(--salmon-2);
}
@supports (-webkit-background-clip: text) or (background-clip: text) {
  .hero h1 .line2 {
    background-image: linear-gradient(
      96deg,
      #ffffff 0%,
      #ffc0b5 38%,
      var(--salmon) 82%
    );
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    -webkit-text-fill-color: transparent;
  }
  .phead h1 {
    background-image: linear-gradient(180deg, #ffffff, #b9bfc9);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
  }
}
.phead h1 {
  color: #f4f5f7;
}

/* button sheen */
.btn-primary {
  position: relative;
  overflow: hidden;
}
.btn-primary::after {
  content: "";
  position: absolute;
  top: -10%;
  bottom: -10%;
  left: -70%;
  width: 45%;
  background: linear-gradient(
    100deg,
    transparent,
    rgba(255, 255, 255, 0.38),
    transparent
  );
  transform: skewX(-18deg);
  transition: left 0.6s var(--ease);
  pointer-events: none;
}
.btn-primary:hover::after {
  left: 130%;
}
.btn-ghost {
  background: rgba(255, 255, 255, 0.015);
}
.btn-ghost:hover {
  background: rgba(255, 111, 94, 0.06);
}

/* hairline gradient */
.hr,
.sec-line {
  background: linear-gradient(90deg, var(--line-strong), transparent 82%);
}

/* hero: ambient + mock tilt */
.hero {
  position: relative;
}
.hero::before {
  content: "";
  position: absolute;
  inset: -10% 0 auto auto;
  width: 46%;
  height: 72%;
  background: radial-gradient(
    ellipse at 50% 40%,
    rgba(255, 111, 94, 0.09),
    transparent 68%
  );
  pointer-events: none;
  z-index: -1;
}
.mock-stage {
  perspective: 1400px;
}
.mock {
  transform: rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg));
  transition: transform 0.2s var(--ease), box-shadow 0.35s var(--ease);
  will-change: transform;
}
.mock-stage:hover .mock {
  box-shadow: 0 58px 110px -46px rgba(0, 0, 0, 0.95),
    0 0 0 1px rgba(255, 111, 94, 0.16);
}

/* fact strip */
.facts {
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.022),
    transparent 70%
  );
}
.fact {
  transition: background 0.3s;
}
.fact:hover {
  background: rgba(255, 255, 255, 0.025);
}
.fact dd {
  transition: color 0.3s;
}
.fact:hover dd {
  color: #ffffff;
}

/* pointer spotlight surfaces */
.card,
.dl-card,
.req,
.stat,
.viz,
.legal {
  position: relative;
}
.card::before,
.dl-card::before,
.req::before,
.stat::before,
.viz::after,
.legal::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    340px circle at var(--mx, 50%) var(--my, -20%),
    rgba(255, 111, 94, 0.1),
    transparent 64%
  );
  opacity: 0;
  transition: opacity 0.35s var(--ease);
  pointer-events: none;
}
.card:hover::before,
.dl-card:hover::before,
.req:hover::before,
.stat:hover::before,
.viz:hover::after,
.legal:hover::before {
  opacity: 1;
}
.card:hover {
  background: var(--panel-2);
}
.card h3 {
  transition: color 0.25s;
}
.card:hover h3 {
  color: #ffffff;
}
.dl-card:hover {
  border-color: rgba(255, 111, 94, 0.42);
  box-shadow: var(--shadow-panel);
}
.dl-card {
  transition: border-color 0.25s, box-shadow 0.3s;
}
.stat:hover b {
  color: var(--salmon-2);
}

/* CTA band */
.cta-band {
  position: relative;
  overflow: hidden;
  background: linear-gradient(
    100deg,
    rgba(255, 111, 94, 0.11),
    transparent 58%
  ),
    radial-gradient(
      620px 240px at 88% 118%,
      rgba(255, 111, 94, 0.1),
      transparent 70%
    );
}
.cta-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(
      rgba(255, 255, 255, 0.055) 1px,
      transparent 1px
    ),
    linear-gradient(90deg, rgba(255, 255, 255, 0.055) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(ellipse at 76% 50%, #000, transparent 72%);
  -webkit-mask-image: radial-gradient(
    ellipse at 76% 50%,
    #000,
    transparent 72%
  );
  pointer-events: none;
  z-index: 0;
}
.cta-band > * {
  position: relative;
  z-index: 1;
}

/* docs nav marker */
.doc-nav a {
  position: relative;
}
.doc-nav a::before {
  content: "";
  position: absolute;
  left: -17px;
  top: 50%;
  width: 1px;
  height: 0;
  background: var(--salmon);
  transition: height 0.25s var(--ease);
}
.doc-nav a:hover::before,
.doc-nav a.on::before {
  height: 62%;
  transform: translateY(-50%);
}

/* footer watermark */
.footer {
  overflow: hidden;
}
.footer::before {
  content: "Salmon";
  position: absolute;
  right: -2%;
  bottom: -0.46em;
  font-family: var(--display);
  font-weight: 600;
  font-size: clamp(120px, 21vw, 300px);
  line-height: 0.8;
  letter-spacing: -0.06em;
  color: rgba(255, 255, 255, 0.028);
  pointer-events: none;
  user-select: none;
}
.foot-grid,
.foot-base {
  position: relative;
  z-index: 1;
}

/* CJK / Japanese typographic tuning */
html[data-lang="zh"] h1,
html[data-lang="zh"] h2,
html[data-lang="zh"] h3,
html[data-lang="zh-hant"] h1,
html[data-lang="zh-hant"] h2,
html[data-lang="zh-hant"] h3,
html[data-lang="ja"] h1,
html[data-lang="ja"] h2,
html[data-lang="ja"] h3 {
  letter-spacing: -0.01em;
}
html[data-lang="zh"] .hero h1,
html[data-lang="zh-hant"] .hero h1,
html[data-lang="ja"] .hero h1 {
  line-height: 1.06;
}
html[data-lang="ja"] .hero h1 {
  font-size: clamp(36px, 4.6vw, 66px);
  letter-spacing: -0.015em;
}
html[data-lang="zh-hant"] .hero h1 {
  font-size: clamp(40px, 5.1vw, 74px);
}
html[data-lang="zh"] body,
html[data-lang="zh-hant"] body,
html[data-lang="ja"] body {
  line-height: 1.75;
}
html[data-lang="zh"] .lede,
html[data-lang="zh-hant"] .lede,
html[data-lang="ja"] .lede,
html[data-lang="zh"] .card p,
html[data-lang="zh-hant"] .card p,
html[data-lang="ja"] .card p,
html[data-lang="zh"] .doc-body p,
html[data-lang="zh-hant"] .doc-body p,
html[data-lang="ja"] .doc-body p {
  line-height: 1.9;
}

/* compact nav for four language buttons */
@media (max-width: 700px) {
  .nav-tools > .btn {
    display: none;
  }
  .lang button {
    padding: 6px 7px;
    font-size: 9.5px;
    letter-spacing: 0.06em;
  }
}
@media (max-width: 900px) {
  .doc-nav a::before {
    display: none;
  }
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .hero-copy > *,
  .mock-stage {
    opacity: 1;
    animation: none;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}