/* ---------- font ---------- */
@font-face {
  font-family: "Inter Var";
  src: url("/fonts/inter-var-latin.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

/* ---------- reset & base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; transition-delay: 0ms !important; }
}

:root,
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #08070d;
  --bg-elevated: #0d0b15;
  --surface: rgba(255, 255, 255, .03);
  --surface-2: rgba(255, 255, 255, .055);
  --surface-solid: #12101b;
  --border: rgba(255, 255, 255, .08);
  --border-strong: rgba(255, 255, 255, .16);
  --text: #eeedf5;
  --muted: #928fa7;
  --accent: #a78bfa;
  --accent-2: #818cf8;
  --accent-3: #60a5fa;
  --accent-dim: rgba(167, 139, 250, .3);
  --grad: linear-gradient(100deg, #a78bfa 0%, #818cf8 45%, #60a5fa 100%);
  --on-grad: #0b0817;
  --nav-bg: rgba(8, 7, 13, .72);
  --glow-1: rgba(167, 139, 250, .11);
  --glow-2: rgba(96, 165, 250, .08);
  --glow-3: rgba(129, 140, 248, .07);
  --tint: rgba(167, 139, 250, .12);
  --tint-soft: rgba(167, 139, 250, .06);
  --shadow-1: 0 1px 2px rgba(0, 0, 0, .5), 0 10px 34px -12px rgba(139, 110, 247, .45);
  --shadow-2: 0 1px 2px rgba(0, 0, 0, .5), 0 14px 44px -12px rgba(139, 110, 247, .6);
  --btn-highlight: inset 0 1px 0 rgba(255, 255, 255, .28);
  --ghost-hover-bg: rgba(255, 255, 255, .05);
  --card-highlight: inset 0 1px 0 rgba(255, 255, 255, .05);
  --panel-bg: #0d0b15;
  --dot: rgba(255, 255, 255, .10);
  --grid-line: rgba(255, 255, 255, .05);
  --spot: rgba(167, 139, 250, .10);
  --ring-a: rgba(167, 139, 250, .6);
  --ring-b: rgba(96, 165, 250, .35);
  --card-shadow-hover: 0 20px 50px -24px rgba(0, 0, 0, .8);
  --sel-bg: rgba(167, 139, 250, .32);
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: #fbfafd;
  --bg-elevated: #f4f2f9;
  --surface: #ffffff;
  --surface-2: #efedf6;
  --surface-solid: #ffffff;
  --border: rgba(23, 15, 42, .10);
  --border-strong: rgba(23, 15, 42, .18);
  --text: #171422;
  --muted: #5f5b72;
  --accent: #7c3aed;
  --accent-2: #4f46e5;
  --accent-3: #2563eb;
  --accent-dim: rgba(124, 58, 237, .3);
  --grad: linear-gradient(100deg, #7c3aed 0%, #4f46e5 45%, #2563eb 100%);
  --on-grad: #ffffff;
  --nav-bg: rgba(251, 250, 253, .78);
  --glow-1: rgba(124, 58, 237, .09);
  --glow-2: rgba(37, 99, 235, .07);
  --glow-3: rgba(79, 70, 229, .06);
  --tint: rgba(124, 58, 237, .10);
  --tint-soft: rgba(124, 58, 237, .05);
  --shadow-1: 0 1px 2px rgba(23, 15, 42, .12), 0 10px 30px -12px rgba(124, 58, 237, .35);
  --shadow-2: 0 1px 2px rgba(23, 15, 42, .12), 0 14px 38px -12px rgba(124, 58, 237, .5);
  --btn-highlight: inset 0 1px 0 rgba(255, 255, 255, .35);
  --ghost-hover-bg: rgba(23, 15, 42, .04);
  --card-highlight: inset 0 1px 0 rgba(255, 255, 255, .8);
  --panel-bg: #ffffff;
  --dot: rgba(23, 15, 42, .14);
  --grid-line: rgba(23, 15, 42, .05);
  --spot: rgba(124, 58, 237, .07);
  --ring-a: rgba(124, 58, 237, .45);
  --ring-b: rgba(37, 99, 235, .3);
  --card-shadow-hover: 0 20px 44px -26px rgba(23, 15, 42, .35);
  --sel-bg: rgba(124, 58, 237, .2);
}

:root {
  /* terminal windows always render as a real dark terminal, regardless of page theme */
  --term-bg: #0e0c16;
  --term-surface-2: #171427;
  --term-border: rgba(255, 255, 255, .09);
  --term-text: #eceaf4;
  --term-muted: #928fa7;
  --term-accent: #a78bfa;
  --term-rose: #f472b6;
  --term-green: #7ee787;

  --font-mono: ui-monospace, "SF Mono", "Cascadia Code", "JetBrains Mono", Menlo, Consolas, monospace;
  --font-sans: "Inter Var", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --radius: 16px;
  --max: 1120px;
  --ease-out: cubic-bezier(.16, 1, .3, 1);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-weight: 420;
  font-feature-settings: "cv05", "cv11";
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background .2s ease, color .2s ease;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
code { font-family: var(--font-mono); }
h1, h2, h3 { text-rendering: optimizeLegibility; text-wrap: balance; }
p { text-wrap: pretty; }

::selection { background: var(--sel-bg); }
.term-body ::selection, .term-body::selection { background: rgba(167, 139, 250, .35); color: #fff; }

html {
  scrollbar-color: var(--border-strong) transparent;
  scrollbar-width: thin;
}
::-webkit-scrollbar { width: 10px; height: 8px; }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 8px; }
::-webkit-scrollbar-track { background: transparent; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

section[id], footer[id] { scroll-margin-top: 84px; }

.visually-hidden {
  position: absolute; width: 1px; height: 1px; margin: -1px;
  clip-path: inset(50%); overflow: hidden; white-space: nowrap;
}

.skip-link {
  position: absolute; left: -999px; top: 0;
  background: var(--surface-solid); color: var(--text); padding: .75rem 1rem;
  border: 1px solid var(--border-strong);
  border-radius: 0 0 8px 0; z-index: 100;
}
.skip-link:focus { left: 0; }

.icon { width: 1.1em; height: 1.1em; }
.icon-sm { width: 16px; height: 16px; flex: none; }

/* ---------- background glow ---------- */
.bg-glow {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(700px 500px at 15% -5%, var(--glow-1), transparent 60%),
    radial-gradient(800px 600px at 100% 10%, var(--glow-2), transparent 60%),
    radial-gradient(900px 700px at 50% 120%, var(--glow-3), transparent 60%);
}

/* ---------- layout helpers ---------- */
.section-inner { max-width: var(--max); margin: 0 auto; padding: 0 1.5rem; }
.eyebrow {
  font-family: var(--font-mono); font-size: .75rem; letter-spacing: .14em;
  font-weight: 500;
  text-transform: uppercase; color: var(--accent); margin: 0 0 .85rem;
}
.eyebrow-center { text-align: center; }
.section-title {
  font-size: clamp(1.9rem, 3.6vw, 2.7rem); margin: 0 0 .75rem;
  font-weight: 675; letter-spacing: -.025em; line-height: 1.12;
}
.section-title-center { text-align: center; }

/* gradient hairline section divider */
.section-divider {
  border: none; height: 1px; margin: 0;
  background: linear-gradient(90deg, transparent, var(--border-strong) 18%, var(--border-strong) 82%, transparent);
}

/* animated growing underline for text links */
.link-underline {
  background: linear-gradient(currentColor, currentColor) no-repeat left calc(100% - 0.05em) / 0% 1px;
  transition: background-size .25s var(--ease-out);
  padding-bottom: .1em;
}
.link-underline:hover, .link-underline:focus-visible { background-size: 100% 1px; }

/* ---------- buttons ---------- */
.btn {
  position: relative;
  display: inline-flex; align-items: center; gap: .5rem;
  font-family: var(--font-sans); font-weight: 600; font-size: .95rem;
  letter-spacing: -.005em;
  padding: .8rem 1.4rem; border-radius: 999px; border: 1px solid transparent;
  cursor: pointer; overflow: hidden;
  transition: transform .15s ease, box-shadow .2s ease, background .15s ease, border-color .15s ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(0) scale(.98); }
.btn-lg { padding: 1rem 1.7rem; font-size: 1rem; }
.btn-small { padding: .5rem 1rem; font-size: .85rem; }
.btn-primary {
  background: var(--grad); color: var(--on-grad);
  box-shadow: var(--shadow-1), var(--btn-highlight);
}
.btn-primary::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(105deg, transparent 35%, rgba(255, 255, 255, .38) 50%, transparent 65%);
  transform: translateX(-130%);
  transition: transform .65s ease;
  pointer-events: none;
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: var(--shadow-2), var(--btn-highlight); }
.btn-primary:hover::before { transform: translateX(130%); }
.btn-ghost {
  background: var(--surface); color: var(--text); border-color: var(--border);
  box-shadow: var(--card-highlight);
}
.btn-ghost:hover { border-color: var(--border-strong); background: var(--ghost-hover-bg); transform: translateY(-1px); }

/* ---------- theme toggle ---------- */
.theme-toggle {
  position: relative;
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; flex: none; border-radius: 999px;
  background: var(--surface); border: 1px solid var(--border); color: var(--muted);
  cursor: pointer; transition: color .15s ease, border-color .15s ease;
}
.theme-toggle:hover { color: var(--text); border-color: var(--border-strong); }
.theme-toggle svg {
  position: absolute;
  transition: opacity .25s ease, transform .4s var(--ease-out);
}
.theme-toggle .theme-icon-sun { opacity: 0; transform: rotate(-90deg) scale(.5); }
.theme-toggle .theme-icon-moon { opacity: 1; transform: rotate(0) scale(1); }
:root[data-theme="light"] .theme-toggle .theme-icon-sun { opacity: 1; transform: rotate(0) scale(1); }
:root[data-theme="light"] .theme-toggle .theme-icon-moon { opacity: 0; transform: rotate(90deg) scale(.5); }

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background .25s ease, border-color .25s ease, box-shadow .25s ease;
}
.nav.is-scrolled,
.nav.is-open {
  background: var(--nav-bg);
  -webkit-backdrop-filter: blur(14px) saturate(1.5);
  backdrop-filter: blur(14px) saturate(1.5);
  border-bottom-color: var(--border);
  box-shadow: 0 8px 30px -18px rgba(0, 0, 0, .5);
}
.nav-inner {
  max-width: var(--max); margin: 0 auto; padding: .9rem 1.5rem;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}
.nav-right { display: flex; align-items: center; gap: .9rem; }
.wordmark {
  font-family: var(--font-mono); font-weight: 700; font-size: 1.1rem;
  color: var(--text); display: inline-flex; align-items: center; gap: .35rem;
}
.wordmark-glyph { color: var(--accent); transition: transform .25s var(--ease-out); }
.wordmark:hover .wordmark-glyph { transform: translateX(3px); }
.wordmark-sm { font-size: 1rem; }
.nav-links { display: flex; gap: 1.6rem; font-size: .92rem; color: var(--muted); }
.nav-links a { transition: color .15s ease; }
.nav-links a:hover, .nav-links a.is-active { color: var(--text); }

/* burger */
.nav-burger {
  display: none;
  position: relative;
  width: 36px; height: 36px; flex: none; border-radius: 999px;
  background: var(--surface); border: 1px solid var(--border); color: var(--text);
  cursor: pointer;
}
.nav-burger span {
  position: absolute; left: 10px; right: 10px; height: 1.6px;
  background: currentColor; border-radius: 2px;
  transition: transform .3s var(--ease-out);
}
.nav-burger span:nth-child(1) { top: 14px; }
.nav-burger span:nth-child(2) { bottom: 14px; }
.nav-burger.is-open span:nth-child(1) { transform: translateY(3.2px) rotate(45deg); }
.nav-burger.is-open span:nth-child(2) { transform: translateY(-3.2px) rotate(-45deg); }

/* mobile menu */
.mobile-menu {
  display: none;
  padding: .4rem 1.5rem 1.4rem;
  border-bottom: 1px solid var(--border);
  background: var(--nav-bg);
  -webkit-backdrop-filter: blur(14px) saturate(1.5);
  backdrop-filter: blur(14px) saturate(1.5);
}
.mobile-menu a {
  display: block; padding: .8rem .2rem; font-size: 1rem; color: var(--muted);
  border-bottom: 1px solid var(--border);
  opacity: 0; transform: translateY(-6px);
  transition: opacity .3s ease, transform .3s var(--ease-out), color .15s ease;
}
.mobile-menu a:hover { color: var(--text); }
.mobile-menu .btn { display: inline-flex; margin-top: 1.1rem; border-bottom: none; opacity: 0; transform: translateY(-6px); }
.nav.is-open .mobile-menu { display: block; }
.nav.is-open .mobile-menu a, .nav.is-open .mobile-menu .btn {
  opacity: 1; transform: translateY(0);
}
.nav.is-open .mobile-menu > *:nth-child(1) { transition-delay: 40ms; }
.nav.is-open .mobile-menu > *:nth-child(2) { transition-delay: 80ms; }
.nav.is-open .mobile-menu > *:nth-child(3) { transition-delay: 120ms; }
.nav.is-open .mobile-menu > *:nth-child(4) { transition-delay: 160ms; }
.nav.is-open .mobile-menu > *:nth-child(5) { transition-delay: 200ms; }

@media (max-width: 720px) {
  .nav-links { display: none; }
  .nav-burger { display: inline-flex; }
  .nav-inner .btn-small { display: none; }
  .nav.is-open .nav-inner { border-bottom: none; }
}
@media (min-width: 721px) {
  .mobile-menu { display: none !important; }
}

/* ---------- hero ---------- */
.hero {
  position: relative;
  padding: 5.5rem 0 6rem;
  overflow: clip;
}
.hero-bg { position: absolute; inset: 0; z-index: -1; pointer-events: none; }
.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(ellipse 85% 65% at 50% 0%, black 25%, transparent 78%);
  mask-image: radial-gradient(ellipse 85% 65% at 50% 0%, black 25%, transparent 78%);
}
.hero-aurora {
  position: absolute; width: 760px; height: 760px; border-radius: 50%;
  will-change: transform;
}
.hero-aurora-a {
  top: -320px; left: -180px;
  background: radial-gradient(closest-side, var(--glow-1), transparent 72%);
  animation: aurora-a 26s ease-in-out infinite alternate;
}
.hero-aurora-b {
  top: -260px; right: -240px;
  background:
    radial-gradient(closest-side, var(--glow-2), transparent 70%),
    radial-gradient(closest-side, var(--glow-3), transparent 78%);
  animation: aurora-b 22s ease-in-out infinite alternate;
}
@keyframes aurora-a {
  from { transform: translate(0, 0) scale(1); }
  to { transform: translate(120px, 60px) scale(1.15); }
}
@keyframes aurora-b {
  from { transform: translate(0, 0) scale(1.05); }
  to { transform: translate(-100px, 80px) scale(.95); }
}
.hero-spotlight {
  position: absolute; inset: 0;
  background: radial-gradient(60% 42% at 50% -12%, var(--glow-3), transparent 70%);
}

.hero-inner {
  max-width: var(--max); margin: 0 auto; padding: 0 1.5rem;
  display: grid; grid-template-columns: 1.05fr .95fr; gap: 3rem; align-items: center;
}

.hero-badge {
  display: inline-flex; align-items: center; gap: .5rem;
  font-family: var(--font-mono); font-size: .76rem; letter-spacing: .04em;
  color: var(--muted);
  padding: .42rem .9rem .42rem .75rem; border-radius: 999px;
  border: 1px solid transparent;
  background:
    linear-gradient(var(--surface-solid), var(--surface-solid)) padding-box,
    linear-gradient(110deg, var(--ring-a), var(--border) 45%, var(--ring-b)) border-box;
  margin-bottom: 1.4rem;
  transition: color .15s ease;
}
.hero-badge:hover { color: var(--text); }
.badge-dot {
  width: 6px; height: 6px; flex: none; border-radius: 50%;
  background: #34d072;
  box-shadow: 0 0 0 0 rgba(52, 208, 114, .45);
  animation: badge-pulse 2.4s ease-out infinite;
}
@keyframes badge-pulse {
  0% { box-shadow: 0 0 0 0 rgba(52, 208, 114, .45); }
  70% { box-shadow: 0 0 0 7px rgba(52, 208, 114, 0); }
  100% { box-shadow: 0 0 0 0 rgba(52, 208, 114, 0); }
}

.hero-copy h1 {
  font-size: clamp(2.4rem, 4.6vw, 3.55rem); line-height: 1.06; letter-spacing: -.03em;
  margin: 0 0 1.2rem; font-weight: 725;
}
.grad-text {
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
}
:root[data-theme="dark"] .hero-copy .grad-text {
  filter: drop-shadow(0 0 26px rgba(167, 139, 250, .25));
}
.hero-sub { color: var(--muted); font-size: 1.0625rem; line-height: 1.6; max-width: 46ch; margin: 0 0 2rem; }
.hero-ctas { display: flex; gap: .9rem; flex-wrap: wrap; margin-bottom: 1.6rem; }

.hero-chips { display: flex; gap: .5rem; flex-wrap: wrap; }
.chip {
  font-family: var(--font-mono); font-size: .74rem; color: var(--muted);
  border: 1px solid var(--border); background: var(--surface);
  padding: .28rem .65rem; border-radius: 999px;
  display: inline-flex; align-items: center; gap: .35rem;
}
.chip .icon-sm { width: 12px; height: 12px; color: var(--accent); }

@media (max-width: 900px) {
  .hero { padding-top: 3.5rem; }
  .hero-inner { grid-template-columns: 1fr; }
}

/* hero terminal extras */
.hero-term { position: relative; }
.hero-term::after {
  content: ""; position: absolute; left: 8%; right: 8%; bottom: -34px; height: 60px;
  background: radial-gradient(50% 100% at 50% 0%, var(--glow-1), transparent 75%);
  pointer-events: none;
}
.hero-term .term-window {
  animation: term-enter .8s var(--ease-out) both;
  animation-delay: .15s;
}
@keyframes term-enter {
  from { opacity: 0; transform: translateY(26px) scale(.985); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* ---------- terminal window (fixed dark palette in both themes) ---------- */
.term-window {
  position: relative;
  border-radius: 14px;
  border: 1px solid transparent;
  background:
    linear-gradient(var(--term-bg), var(--term-bg)) padding-box,
    linear-gradient(150deg, rgba(255, 255, 255, .16), rgba(255, 255, 255, .05) 35%, rgba(167, 139, 250, .14)) border-box;
  box-shadow:
    0 0 0 1px rgba(167, 139, 250, .05),
    0 2px 6px rgba(0, 0, 0, .5),
    0 32px 80px -26px rgba(0, 0, 0, .85),
    0 0 60px -22px rgba(167, 139, 250, .22);
  overflow: hidden;
}
.term-window::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(115deg, rgba(255, 255, 255, .045) 0%, transparent 38%);
}
.term-titlebar {
  position: relative;
  display: flex; align-items: center; gap: .45rem;
  padding: .72rem .95rem;
  background: linear-gradient(180deg, #1d1932, var(--term-surface-2));
  border-bottom: 1px solid var(--term-border);
}
.dot {
  width: 11px; height: 11px; border-radius: 50%;
  box-shadow: inset 0 0 0 .5px rgba(0, 0, 0, .3), inset 0 1px 0 rgba(255, 255, 255, .25);
}
.dot-red { background: #ff5f57; } .dot-yellow { background: #febc2e; } .dot-green { background: #28c840; }
.term-title {
  position: absolute; left: 50%; transform: translateX(-50%);
  font-family: var(--font-mono); font-size: .76rem; color: var(--term-muted);
  white-space: nowrap;
}
.term-body {
  margin: 0; padding: 1.15rem 1.25rem 1.35rem; min-height: 250px;
  font-family: var(--font-mono); font-size: .86rem; line-height: 1.7;
  color: var(--term-text); white-space: pre-wrap; word-break: break-word;
  overflow-x: auto;
  scrollbar-width: thin;
}
.term-body .dim { color: var(--term-muted); }
.term-body .cy { color: var(--term-accent); }
.term-body .co { color: var(--term-rose); }
.term-body .gr { color: var(--term-green); }
.term-body .bold { font-weight: 700; }
.term-body .prompt { color: var(--term-accent); }
.cursor {
  display: inline-block; width: 7px; height: 1em; background: var(--term-accent);
  border-radius: 1px;
  vertical-align: text-bottom; margin-left: 1px; animation: blink 1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* ---------- download ---------- */
.download {
  position: relative;
  padding: 6.5rem 0;
  background: var(--bg-elevated);
  text-align: center;
  overflow: clip;
}
.download::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: radial-gradient(var(--dot) 1px, transparent 1px);
  background-size: 26px 26px;
  -webkit-mask-image: radial-gradient(ellipse 70% 80% at 50% 45%, black 20%, transparent 75%);
  mask-image: radial-gradient(ellipse 70% 80% at 50% 45%, black 20%, transparent 75%);
  opacity: .5;
}
.download::after {
  content: ""; position: absolute; left: 50%; top: 55%; width: 820px; height: 500px;
  transform: translate(-50%, -50%); pointer-events: none;
  background: radial-gradient(closest-side, var(--glow-1), transparent 75%);
}
.download > .section-inner { position: relative; z-index: 1; }
.download-title {
  font-size: clamp(2.2rem, 5vw, 3.2rem); font-weight: 725; letter-spacing: -.03em;
  margin: 0 0 .7rem;
}
.download-sub { color: var(--muted); font-size: 1.05rem; max-width: 46ch; margin: 0 auto 1.7rem; }
.badges { display: flex; gap: .6rem; justify-content: center; flex-wrap: wrap; margin-bottom: 2.4rem; }
.badge {
  font-family: var(--font-mono); font-size: .76rem; color: var(--accent);
  border: 1px solid var(--accent-dim); background: var(--tint-soft); padding: .35rem .8rem; border-radius: 999px;
}

.install-card {
  max-width: 680px; margin: 0 auto;
  border-radius: 18px;
  border: 1px solid transparent;
  background:
    linear-gradient(var(--surface-solid), var(--surface-solid)) padding-box,
    linear-gradient(120deg, var(--ring-a), var(--border) 40%, var(--border) 60%, var(--ring-b)) border-box;
  overflow: hidden;
  box-shadow: 0 30px 80px -30px rgba(0, 0, 0, .5), var(--card-highlight);
  text-align: left;
}
.install-tabs { position: relative; display: flex; border-bottom: 1px solid var(--border); }
.install-tab {
  flex: 1; background: none; border: none; color: var(--muted); font-family: var(--font-sans);
  font-size: .88rem; font-weight: 600; padding: .95rem .5rem; cursor: pointer;
  transition: color .15s ease;
}
.install-tab:hover { color: var(--text); }
.install-tab.is-active { color: var(--text); }
.install-tab-indicator {
  position: absolute; bottom: -1px; left: 0; height: 2px; width: 80px;
  background: var(--grad); border-radius: 2px;
  transition: transform .35s var(--ease-out), width .35s var(--ease-out);
  pointer-events: none;
}
.install-panel { display: none; padding: 1.5rem; }
.install-panel.is-active { display: block; }
.cmd-row {
  display: flex; align-items: center; gap: .75rem; background: var(--surface-2);
  border: 1px solid var(--border); border-radius: 10px; padding: .55rem .6rem .55rem 1rem;
}
.cmd {
  flex: 1; overflow-x: auto; white-space: nowrap; font-size: .86rem; color: var(--accent);
  scrollbar-width: thin;
}
.copy-btn {
  flex: none; display: inline-flex; align-items: center; gap: .4rem;
  background: var(--surface-solid); border: 1px solid var(--border); color: var(--muted);
  font-family: var(--font-sans); font-size: .8rem; font-weight: 600;
  padding: .5rem .7rem; border-radius: 8px; cursor: pointer; transition: all .15s ease;
}
.copy-btn:hover { color: var(--text); border-color: var(--border-strong); }
.copy-btn .check-icon { display: none; color: #22a35e; }
.copy-btn.is-copied .copy-icon { display: none; }
.copy-btn.is-copied .check-icon { display: block; animation: pop .3s var(--ease-out); }
@keyframes pop {
  0% { transform: scale(.4); }
  60% { transform: scale(1.2); }
  100% { transform: scale(1); }
}
.cmd-hint { color: var(--muted); font-size: .8rem; margin: .75rem 0 0; font-family: var(--font-mono); }
.cmd-hint code { color: var(--text); }

.install-footnote { color: var(--muted); font-size: .85rem; max-width: 54ch; margin: 1.8rem auto 0; }
.install-footnote a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }

/* ---------- demos ---------- */
.demos { padding: 6.5rem 0; }
.demo-row {
  display: grid; grid-template-columns: .85fr 1.15fr; gap: 3rem; align-items: center;
  margin-top: 4rem;
}
.demo-row-reverse .demo-copy { order: 2; }
.demo-row-reverse .demo-term { order: 1; }
.demo-copy h3 { font-size: 1.45rem; font-weight: 650; letter-spacing: -.015em; margin: 0 0 .7rem; }
.demo-copy h3::before {
  content: ""; display: block; width: 34px; height: 3px; border-radius: 2px;
  background: var(--grad); margin-bottom: 1rem;
}
.demo-copy p { color: var(--muted); line-height: 1.65; }
.demo-copy code {
  color: var(--accent); background: var(--tint); border: 1px solid var(--accent-dim);
  padding: .08rem .35rem; border-radius: 5px; font-size: .85em;
}

@media (max-width: 860px) {
  .demo-row, .demo-row-reverse { grid-template-columns: 1fr; gap: 1.6rem; }
  .demo-row-reverse .demo-copy, .demo-row-reverse .demo-term { order: initial; }
}

/* ---------- features ---------- */
.features { padding: 6.5rem 0; }
.feature-grid {
  margin-top: 3rem; display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.1rem;
}
.feature-card {
  position: relative;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--card-highlight);
  padding: 1.7rem;
  transition: transform .25s var(--ease-out), box-shadow .25s ease, border-color .2s ease;
  overflow: hidden;
}
.feature-card:hover { transform: translateY(-3px); box-shadow: var(--card-shadow-hover), var(--card-highlight); }
/* mouse spotlight */
.feature-card::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(240px circle at var(--mx, 50%) var(--my, 0%), var(--spot), transparent 65%);
  opacity: 0; transition: opacity .3s ease;
}
/* gradient border reveal */
.feature-card::after {
  content: ""; position: absolute; inset: 0; border-radius: inherit; padding: 1px;
  background: radial-gradient(280px circle at var(--mx, 50%) var(--my, 0%), var(--ring-a), var(--ring-b) 45%, transparent 72%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
  opacity: 0; transition: opacity .3s ease;
  pointer-events: none;
}
.feature-card:hover::before, .feature-card:hover::after { opacity: 1; }

.feature-icon {
  width: 42px; height: 42px; border-radius: 11px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--tint), var(--tint-soft));
  border: 1px solid var(--accent-dim);
  color: var(--accent); margin-bottom: 1.05rem;
  transition: transform .25s var(--ease-out);
}
.feature-card:hover .feature-icon { transform: translateY(-2px); }
.feature-icon svg { width: 22px; height: 22px; }
.feature-card h3 { font-size: 1.05rem; font-weight: 600; letter-spacing: -.01em; margin: 0 0 .5rem; }
.feature-card p { color: var(--muted); font-size: .92rem; line-height: 1.6; margin: 0; }

@media (max-width: 860px) { .feature-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .feature-grid { grid-template-columns: 1fr; } }

/* ---------- how it works ---------- */
.how { padding: 6.5rem 0; }
.how-sub { color: var(--muted); max-width: 50ch; margin: 0 auto 3rem; text-align: center; }
.flow-panel {
  position: relative;
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 3rem 2rem;
  overflow: hidden;
  box-shadow: var(--card-highlight);
}
.flow-panel::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: radial-gradient(var(--dot) 1px, transparent 1px);
  background-size: 24px 24px;
  -webkit-mask-image: radial-gradient(ellipse 80% 90% at 50% 50%, black 15%, transparent 80%);
  mask-image: radial-gradient(ellipse 80% 90% at 50% 50%, black 15%, transparent 80%);
  opacity: .45;
}
.flow {
  position: relative;
  display: flex; align-items: center; justify-content: center; gap: 0; flex-wrap: wrap;
}
.flow-node {
  display: flex; flex-direction: column; align-items: center; gap: .3rem;
  background: var(--surface-solid); border: 1px solid var(--border); border-radius: 12px;
  padding: 1.15rem 1.35rem; min-width: 132px; text-align: center;
  box-shadow: var(--card-highlight);
}
.flow-node-endpoint {
  border-color: transparent;
  background:
    linear-gradient(var(--surface-solid), var(--surface-solid)) padding-box,
    linear-gradient(130deg, var(--ring-a), var(--border) 50%, var(--ring-b)) border-box;
}
.flow-label { font-family: var(--font-mono); font-weight: 700; color: var(--text); font-size: .92rem; }
.flow-desc { color: var(--muted); font-size: .78rem; }
.flow-desc code { color: var(--accent); }
.flow-arrow {
  width: 52px; height: 8px; position: relative; margin: 0 .4rem;
  display: flex; align-items: center;
}
.flow-arrow::before {
  content: ""; position: absolute; left: 0; right: 6px; top: 50%; height: 0;
  border-top: 1px dashed var(--border-strong);
}
.flow-arrow::after {
  content: ""; position: absolute; right: 0; top: 50%;
  width: 7px; height: 7px; transform: translateY(-50%) rotate(45deg);
  border-top: 1.6px solid var(--border-strong);
  border-right: 1.6px solid var(--border-strong);
}
.flow-arrow span {
  position: absolute; left: 0; right: 6px; top: 50%; height: 2px; margin-top: -1px;
  overflow: hidden;
}
.flow-arrow span::before {
  content: ""; position: absolute; inset: 0; width: 45%;
  background: linear-gradient(90deg, transparent, var(--flow-streak, var(--accent)), transparent);
  animation: flow 2.2s linear infinite;
}
.flow-arrow-1 { --flow-streak: var(--accent); }
.flow-arrow-2 { --flow-streak: var(--accent-2); }
.flow-arrow-3 { --flow-streak: var(--accent-3); }
@keyframes flow { from { transform: translateX(-100%); } to { transform: translateX(320%); } }

@media (max-width: 760px) {
  .flow { flex-direction: column; }
  .flow-panel { padding: 2.2rem 1.4rem; }
  .flow-arrow { width: 8px; height: 38px; margin: .1rem 0; }
  .flow-arrow::before {
    left: 50%; right: auto; top: 0; bottom: 6px; height: auto; width: 0;
    border-top: none; border-left: 1px dashed var(--border-strong);
  }
  .flow-arrow::after {
    right: auto; left: 50%; top: auto; bottom: 0;
    transform: translateX(-50%) rotate(135deg);
  }
  .flow-arrow span {
    left: 50%; right: auto; top: 0; bottom: 6px; height: auto; width: 2px; margin: 0 0 0 -1px;
  }
  .flow-arrow span::before {
    width: 100%; height: 45%;
    background: linear-gradient(180deg, transparent, var(--flow-streak, var(--accent)), transparent);
    animation-name: flowv;
  }
  @keyframes flowv { from { transform: translateY(-100%); } to { transform: translateY(320%); } }
}

/* ---------- security ---------- */
.security { padding: 5rem 0; }
.security-panel {
  display: grid; grid-template-columns: repeat(4, 1fr);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  box-shadow: var(--card-highlight);
  overflow: hidden;
}
.security-item {
  display: flex; flex-direction: column; align-items: flex-start; gap: .8rem;
  padding: 1.8rem 1.6rem;
}
.security-item + .security-item { border-left: 1px solid var(--border); }
.security-icon-chip {
  width: 36px; height: 36px; border-radius: 10px; flex: none;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--tint), var(--tint-soft));
  border: 1px solid var(--accent-dim);
  color: var(--accent);
}
.security-icon { width: 19px; height: 19px; }
.security-item p { margin: 0; color: var(--muted); font-size: .9rem; line-height: 1.6; }
.security-item code { color: var(--accent); font-size: .85em; }

@media (max-width: 860px) {
  .security-panel { grid-template-columns: 1fr 1fr; }
  .security-item + .security-item { border-left: none; }
  .security-item:nth-child(even) { border-left: 1px solid var(--border); }
  .security-item:nth-child(n+3) { border-top: 1px solid var(--border); }
}
@media (max-width: 560px) {
  .security-panel { grid-template-columns: 1fr; }
  .security-item:nth-child(even) { border-left: none; }
  .security-item:nth-child(n+2) { border-top: 1px solid var(--border); }
}

/* ---------- final cta ---------- */
.final-cta { padding: 6.5rem 0; }
.cta-panel {
  position: relative;
  text-align: center;
  border-radius: 24px;
  border: 1px solid transparent;
  background:
    linear-gradient(var(--panel-bg), var(--panel-bg)) padding-box,
    linear-gradient(120deg, var(--ring-a), var(--border) 35%, var(--border) 65%, var(--ring-b)) border-box;
  padding: 4.5rem 2rem;
  overflow: hidden;
  box-shadow: 0 40px 100px -50px rgba(0, 0, 0, .6), var(--card-highlight);
}
.cta-bg { position: absolute; inset: 0; pointer-events: none; }
.cta-bg::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 44px 44px;
  -webkit-mask-image: radial-gradient(ellipse 75% 90% at 50% 50%, black 10%, transparent 75%);
  mask-image: radial-gradient(ellipse 75% 90% at 50% 50%, black 10%, transparent 75%);
}
.cta-bg::after {
  content: ""; position: absolute; left: 50%; top: 50%; width: 700px; height: 420px;
  transform: translate(-50%, -50%);
  background:
    radial-gradient(closest-side at 38% 45%, var(--glow-1), transparent 72%),
    radial-gradient(closest-side at 66% 60%, var(--glow-2), transparent 72%);
}
.cta-panel > * { position: relative; }
.cta-panel h2 {
  font-size: clamp(1.9rem, 4vw, 2.7rem); margin: 0 0 .6rem;
  font-weight: 700; letter-spacing: -.025em;
}
.cta-panel p { color: var(--muted); margin: 0 0 2.2rem; }
.cta-actions { display: flex; gap: .9rem; justify-content: center; flex-wrap: wrap; }

/* ---------- footer ---------- */
.footer { padding: 3.5rem 0 2rem; position: relative; }
.footer::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-strong) 18%, var(--border-strong) 82%, transparent);
}
.footer-inner { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 2rem; margin-bottom: 2.5rem; }
.footer-col { display: flex; flex-direction: column; gap: .55rem; align-items: flex-start; }
.footer-col h4 { margin: 0 0 .2rem; font-size: .78rem; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: .1em; }
.footer-col a { color: var(--muted); font-size: .9rem; }
.footer-col a:hover { color: var(--text); }
.footer-tagline { color: var(--muted); font-size: .88rem; margin: 0; }
.footer-login {
  font-family: var(--font-mono); font-size: .78rem; color: var(--muted);
  opacity: .75; margin: .4rem 0 0;
}
.footer-login .prompt-char { color: var(--accent); }
.footer-muted { color: var(--muted); font-size: .9rem; margin: 0; }
.disclaimer {
  border-top: 1px solid var(--border); padding-top: 1.6rem; color: var(--muted);
  font-size: .78rem; max-width: 70ch;
}

@media (max-width: 640px) { .footer-inner { grid-template-columns: 1fr; } }

/* ---------- 404 ---------- */
.notfound {
  position: relative;
  min-height: 100vh;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center; padding: 2rem;
  overflow: clip;
}
.notfound-code {
  font-family: var(--font-mono); font-weight: 700;
  font-size: clamp(5rem, 18vw, 9rem); line-height: 1; letter-spacing: -.04em;
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
  opacity: .9; margin: 0 0 1.2rem;
}
.notfound h1 { font-size: clamp(1.6rem, 4vw, 2.2rem); font-weight: 675; letter-spacing: -.02em; margin: 0 0 1.6rem; }
.notfound .term-window { width: min(430px, 100%); text-align: left; margin: 0 0 2.2rem; }
.notfound .term-body { min-height: 0; }

/* ---------- scroll reveal ---------- */
.reveal {
  opacity: 0; transform: translateY(20px) scale(.995);
  transition: opacity .8s var(--ease-out), transform .8s var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
}
.reveal.is-visible { opacity: 1; transform: translateY(0) scale(1); }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero-term .term-window { animation: none; }
  .hero-aurora { animation: none; }
  .badge-dot { animation: none; }
  .flow-arrow span::before { animation: none; }
}