:root {
  color-scheme: dark light;
  --radius: 28px;
  --header-bg: rgba(0, 0, 0, .72);
  --bg: #000000;
  --bg-soft: #08080f;
  --surface: rgba(255,255,255,.065);
  --surface-strong: rgba(255,255,255,.11);
  --text: #ffffff;
  --muted: #aeb0bf;
  --line: rgba(255,255,255,.2);
  --terminal-border: #333333;
  --terminal-bg: #000000;
  --accent: #f81ce5;
  --accent-strong: rgba(248,28,229,.8);
  --accent-soft: rgba(248,28,229,.14);
  --accent-glow: rgba(248,28,229,.32);
  --accent-2: #7c5cff;
  --accent-2-soft: rgba(124,92,255,.18);
  --button-bg: #ffffff;
  --button-text: #09090f;
  --shadow: 0 30px 90px rgba(0,0,0,.55);
}

html[data-theme="light"] {
  color-scheme: light;
  --header-bg: rgba(255, 255, 255, .78);
  --bg: #fbfaff;
  --bg-soft: #f0edf8;
  --surface: rgba(16,16,28,.055);
  --surface-strong: rgba(16,16,28,.095);
  --text: #11111c;
  --muted: #5e6073;
  --line: rgba(17,17,28,.13);
  --terminal-border: rgba(17,17,28,.16);
  --terminal-bg: #11111c;
  --accent: #7c3aed;
  --accent-strong: rgba(124,58,237,.9);
  --accent-soft: rgba(124,58,237,.12);
  --accent-glow: rgba(124,58,237,.24);
  --accent-2: #2563eb;
  --accent-2-soft: rgba(37,99,235,.12);
  --button-bg: #11111c;
  --button-text: #ffffff;
  --shadow: 0 26px 75px rgba(36,30,63,.16);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 18% 12%, var(--accent-soft), transparent 28rem),
    radial-gradient(circle at 82% 8%, var(--accent-2-soft), transparent 26rem),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-soft) 58%, var(--bg) 100%);
  color: var(--text);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,.7), transparent 70%);
}

html[data-theme="light"] body::before {
  background-image:
    linear-gradient(rgba(17,17,28,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(17,17,28,.045) 1px, transparent 1px);
}

.page-shell {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: fixed;
  top: 18px;
  left: 50%;
  z-index: 10;
  width: min(1180px, calc(100% - 40px));
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 12px 14px 12px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--header-bg);
  box-shadow: 0 14px 60px rgba(0,0,0,.22);
  backdrop-filter: blur(18px);
}

.brand, .github-link, .nav-links a, .cta {
  color: var(--text);
  text-decoration: none;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  font-weight: 800;
  letter-spacing: -.02em;
}

.brand-mark {
  position: relative;
  display: grid;
  flex: 0 0 auto;
  width: 42px;
  height: 36px;
  place-items: center;
  overflow: hidden;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  color: #ffffff;
  box-shadow:
    inset 0 0 0 1px rgba(255,255,255,.22),
    0 10px 26px var(--accent-glow);
  transition: transform .2s ease, box-shadow .2s ease;
}

.brand:hover .brand-mark {
  transform: translateY(-1px);
  box-shadow:
    inset 0 0 0 1px rgba(255,255,255,.28),
    0 14px 32px var(--accent-glow);
}

.brand-mark::before {
  content: "";
  position: absolute;
  inset: 1px;
  border-radius: 13px;
  background: linear-gradient(180deg, rgba(255,255,255,.24), rgba(255,255,255,0) 58%);
  pointer-events: none;
}

.brand-mark svg {
  position: relative;
  z-index: 1;
  display: block;
  width: 25px;
  height: auto;
  filter: drop-shadow(0 1px 4px rgba(0,0,0,.28));
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-links a {
  padding: 9px 12px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 14px;
  transition: background .2s ease, color .2s ease;
}

.nav-links a:hover { background: var(--surface); color: var(--text); }

.header-actions {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.language-select {
  height: 40px;
  padding: 0 34px 0 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  appearance: none;
  background:
    linear-gradient(45deg, transparent 50%, var(--muted) 50%) right 14px center / 6px 6px no-repeat,
    linear-gradient(135deg, var(--surface), rgba(255,255,255,.035));
  color: var(--text);
  cursor: pointer;
  font: 800 13px Inter, system-ui, sans-serif;
}

.language-select:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  height: 40px;
  padding: 5px 11px 5px 5px;
  border: none;
  border-radius: 999px;
  background: none;
  color: var(--text);
  cursor: pointer;
  font: 800 13px Inter, system-ui, sans-serif;
  transition: transform .2s ease, background .2s ease, border-color .2s ease;
}

.theme-toggle:hover {
  transform: translateY(-1px);
  background: var(--surface-strong);
}

.theme-toggle-track {
  position: relative;
  display: inline-flex;
  width: 42px;
  height: 28px;
  padding: 3px;
  border-radius: 999px;
  background: rgba(255,255,255,.12);
  box-shadow: inset 0 0 0 1px var(--line);
}

html[data-theme="light"] .theme-toggle-track {
  background: rgba(17,17,28,.08);
}

.theme-toggle-thumb {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 20px var(--accent-glow);
  transform: translateX(14px);
  transition: transform .2s ease, background .2s ease;
}

html[data-theme="light"] .theme-toggle-thumb {
  transform: translateX(0);
}

.github-link {
  padding: 10px 16px;
  border-radius: 999px;
  background: var(--button-bg);
  color: var(--button-text);
  font-weight: 700;
  font-size: 14px;
}

.hero {
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto auto;
  align-content: center;
  justify-items: center;
  gap: clamp(28px, 5vw, 54px);
  padding: 132px 0 70px;
  text-align: center;
}

.hero-copy {
  max-width: 850px;
  margin-inline: auto;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .14em;
  text-transform: uppercase;
}

h1, h2, h3, p { margin-top: 0; }
h1 {
  margin-bottom: 22px;
  font-size: clamp(46px, 8vw, 82px);
  line-height: .94;
  letter-spacing: -.07em;
}

:where(html[lang="zh"], html[lang="ja"], html[lang="ko"], html[lang="ar"]) h1,
:where(html[lang="zh"], html[lang="ja"], html[lang="ko"], html[lang="ar"]) h2 {
  letter-spacing: 0;
}

html[dir="rtl"] .terminal-body,
html[dir="rtl"] code {
  direction: ltr;
  text-align: left;
}

.hero-text {
  max-width: 740px;
  margin: 0 auto;
  color: var(--muted);
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.65;
}

.terminal-wrap {
  width: min(760px, 100%);
  position: relative;
}

.terminal-wrap::before,
.terminal-wrap::after {
  content: "";
  position: absolute;
  inset: -28px;
  z-index: -1;
  border-radius: 34px;
  background: radial-gradient(circle at center, var(--accent-glow), transparent 62%);
  filter: blur(18px);
}

.terminal-wrap::after {
  inset: 18px 40px -30px;
  background: var(--accent-2-soft);
}

.terminal-window {
  overflow: hidden;
  border: 1px solid var(--terminal-border);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(20,20,31,.94), var(--terminal-bg));
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255,255,255,.08);
  text-align: left;
}

html[data-theme="light"] .terminal-window {
  background: linear-gradient(180deg, #1b1b2c, #10101a);
}

.terminal-chrome {
  display: flex;
  gap: 8px;
  padding: 18px 20px;
  border-bottom: 1px solid var(--terminal-border);
  background: rgba(255,255,255,.045);
}

.terminal-chrome span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255,255,255,.35);
}

.terminal-chrome span:nth-child(2) { opacity: .65; }
.terminal-chrome span:nth-child(3) { opacity: .45; }

.terminal-body {
  position: relative;
  padding: clamp(24px, 4vw, 38px);
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: clamp(13px, 2vw, 18px);
  line-height: 1.9;
  color: #fff;
}

.line {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.line.muted { color: rgba(255,255,255,.52); }
.line.command {
  width: fit-content;
  max-width: 100%;
  margin: 4px 0;
  padding: 2px 0;
  color: var(--accent);
  text-shadow: 0 0 24px var(--accent-glow);
}

.prompt { color: #fff; opacity: .78; }

.copy-button {
  margin-top: 22px;
  appearance: none;
  border: 1px solid var(--accent-glow);
  border-radius: 999px;
  background: var(--accent-soft);
  color: #fff;
  cursor: pointer;
  font: 700 13px Inter, system-ui, sans-serif;
  padding: 11px 16px;
  transition: transform .2s ease, border-color .2s ease, background .2s ease;
}

.copy-button:hover {
  transform: translateY(-1px);
  border-color: var(--accent-strong);
  background: rgba(248,28,229,.2);
}

html[data-theme="light"] .copy-button:hover {
  background: rgba(124,58,237,.2);
}

.trust-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  overflow: hidden;
  margin-bottom: 36px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--line);
}

.trust-strip div {
  padding: 24px;
  background: color-mix(in srgb, var(--bg-soft) 72%, transparent);
}

.trust-strip strong, .trust-strip span { display: block; }
.trust-strip strong { margin-bottom: 8px; font-size: 18px; }
.trust-strip span { color: var(--muted); font-size: 14px; }

.section {
  padding: 92px 0;
}

.section-heading {
  display: grid;
  grid-template-columns: .78fr 1.22fr;
  gap: 28px;
  align-items: end;
  margin-bottom: 34px;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(34px, 5vw, 60px);
  line-height: 1;
  letter-spacing: -.055em;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.card {
  min-height: 290px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: linear-gradient(180deg, var(--surface), rgba(255,255,255,.035));
  box-shadow: inset 0 1px 0 rgba(255,255,255,.05);
}

html[data-theme="light"] .card {
  background: linear-gradient(180deg, rgba(255,255,255,.8), rgba(255,255,255,.46));
}

.card-icon {
  display: inline-grid;
  width: 44px;
  height: 44px;
  place-items: center;
  margin-bottom: 42px;
  border: 1px solid var(--accent-glow);
  border-radius: 14px;
  color: var(--accent);
  background: var(--accent-soft);
  font-size: 13px;
  font-weight: 800;
}

.card h3 {
  margin-bottom: 12px;
  font-size: 21px;
  letter-spacing: -.025em;
}

.card p, .section-text, .safety p {
  color: var(--muted);
  line-height: 1.7;
}

.split {
  display: grid;
  grid-template-columns: .95fr 1.05fr;
  gap: 44px;
  align-items: center;
}

.usage-panel {
  border: 1px solid var(--line);
  border-radius: 26px;
  background: var(--surface);
  overflow: hidden;
}

.usage-row {
  display: grid;
  grid-template-columns: 1.35fr .95fr;
  gap: 18px;
  padding: 20px 22px;
  border-bottom: 1px solid var(--line);
}

.usage-row:last-child { border-bottom: 0; }

code {
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color: var(--accent);
  font-size: 14px;
}

.usage-row span {
  color: var(--muted);
  font-size: 14px;
}

.safety {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 28px;
  margin-bottom: 60px;
  padding: 44px;
  border: 1px solid var(--accent-glow);
  border-radius: 32px;
  background: linear-gradient(135deg, var(--accent-soft), var(--accent-2-soft));
}

.safety-copy { max-width: 660px; }
.safety p { margin-bottom: 0; }

.cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-width: 180px;
  padding: 15px 20px;
  border-radius: 999px;
  background: var(--button-bg);
  color: var(--button-text);
  font-weight: 800;
  white-space: nowrap;
}

@media (max-width: 900px) {
  .nav-links { display: none; }
  .hero { padding-top: 118px; }
  .trust-strip, .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .section-heading, .split { grid-template-columns: 1fr; }
  .usage-row { grid-template-columns: 1fr; gap: 8px; }
  .safety { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 680px) {
  .theme-toggle-text { display: none; }
  .theme-toggle { padding-right: 5px; }
}

@media (max-width: 560px) {
  .page-shell, .site-header { width: min(100% - 24px, 1180px); }
  .github-link { padding-inline: 12px; }
  .brand span:last-child { display: none; }
  .language-select { width: 76px; padding-left: 11px; padding-right: 28px; }
  .hero { min-height: 100svh; }
  .terminal-body { font-size: 12px; }
  .trust-strip, .feature-grid { grid-template-columns: 1fr; }
  .card { min-height: auto; }
  .card-icon { margin-bottom: 28px; }
  .section { padding: 68px 0; }
  .safety { padding: 28px; }
}

@media (max-width: 430px) {
  .header-actions { gap: 6px; }
  .github-link { font-size: 13px; padding: 10px 12px; }
}

@media (prefers-reduced-motion: no-preference) {
  .terminal-window { animation: floatIn .7s ease both; }
  .hero-copy { animation: fadeUp .6s ease both; }
  @keyframes floatIn {
    from { opacity: 0; transform: translateY(18px) scale(.985); }
    to { opacity: 1; transform: translateY(0) scale(1); }
  }
  @keyframes fadeUp {
    from { opacity: 0; transform: translateY(14px); }
    to { opacity: 1; transform: translateY(0); }
  }
}