/* ============================================================
   agent-ssh — landing page
   Design language: "midnight terminal" — near-black navy,
   chrome text, cyan→violet neon accent (from the app icon).
   ============================================================ */

:root {
  /* surfaces */
  --bg: #0b0f14;
  --bg-2: #0e131a;
  --surface: #121823;
  --surface-2: #161d2a;
  --line: #232c3b;
  --line-soft: #1a212e;

  /* text */
  --text: #e9eef5;
  --text-2: #aab4c4;
  --text-3: #6b7686;

  /* neon accent ramp (icon-derived) */
  --cyan: #34d6ee;
  --blue: #4b8cff;
  --violet: #a06bff;
  --magenta: #e15bff;
  --accent: var(--blue);

  --grad: linear-gradient(100deg, var(--cyan), var(--blue) 42%, var(--violet) 74%, var(--magenta));
  --grad-soft: linear-gradient(135deg, rgba(52, 214, 238, 0.16), rgba(160, 107, 255, 0.16));

  /* type */
  --font-ui: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Inter,
    Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "SF Mono", ui-monospace, "JetBrains Mono", Menlo, Consolas, monospace;

  --text-hero: clamp(2.5rem, 1.3rem + 5.2vw, 5.25rem);
  --text-h2: clamp(1.7rem, 1.1rem + 2.4vw, 2.9rem);
  --text-lede: clamp(1.05rem, 0.98rem + 0.5vw, 1.3rem);

  /* rhythm */
  --space-section: clamp(4.5rem, 3rem + 7vw, 9rem);
  --radius: 18px;
  --radius-sm: 12px;
  --maxw: 1180px;

  /* motion */
  --dur: 280ms;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { margin: 0; line-height: 1.08; letter-spacing: -0.02em; font-weight: 700; }
p { margin: 0; }
img { display: block; }

/* ---- atmosphere ---- */
.aurora {
  position: fixed;
  inset: -25% -10% auto -10%;
  height: 80vh;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(40% 55% at 22% 30%, rgba(52, 214, 238, 0.18), transparent 70%),
    radial-gradient(45% 60% at 78% 18%, rgba(225, 91, 255, 0.16), transparent 72%),
    radial-gradient(50% 60% at 55% 0%, rgba(75, 140, 255, 0.16), transparent 70%);
  filter: blur(20px);
}
.grain {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

main, .site-header, .site-footer { position: relative; z-index: 2; }

/* ---- header / nav ---- */
.site-header {
  position: sticky;
  top: 0;
  backdrop-filter: saturate(140%) blur(14px);
  background: color-mix(in oklab, var(--bg) 72%, transparent);
  border-bottom: 1px solid var(--line-soft);
}
.nav {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 24px;
}
.brand { display: flex; align-items: center; gap: 11px; font-weight: 700; letter-spacing: -0.03em; font-size: 1.15rem; }
.brand-mark { border-radius: 9px; box-shadow: 0 0 0 1px var(--line), 0 6px 20px rgba(0,0,0,0.5); }
.brand-slash { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.nav-links { display: flex; gap: 26px; list-style: none; margin: 0 0 0 auto; padding: 0; }
.nav-links a { color: var(--text-2); font-size: 0.95rem; transition: color var(--dur) var(--ease); }
.nav-links a:hover { color: var(--text); }
.nav-cta { margin-left: 4px; }

/* ---- buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 11px 18px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease),
    border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
  will-change: transform;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  color: #07101c;
  background: var(--grad);
  box-shadow: 0 8px 30px rgba(75, 140, 255, 0.32);
}
.btn-primary:hover { box-shadow: 0 12px 40px rgba(160, 107, 255, 0.45); }
.btn-ghost {
  color: var(--text);
  border-color: var(--line);
  background: color-mix(in oklab, var(--surface) 60%, transparent);
}
.btn-ghost:hover { border-color: var(--accent); background: var(--surface-2); }
.btn-lg { padding: 15px 26px; font-size: 1.05rem; }
.btn-arrow { transition: transform var(--dur) var(--ease); }
.btn:hover .btn-arrow { transform: translateX(4px); }

/* ---- hero ---- */
.hero {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(3rem, 2rem + 5vw, 6.5rem) 24px clamp(3rem, 2rem + 4vw, 5rem);
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(2rem, 1rem + 4vw, 4.5rem);
  align-items: center;
}
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 1.1rem;
}
h1#hero-heading { font-size: var(--text-hero); letter-spacing: -0.035em; }
.grad { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lede { color: var(--text-2); font-size: var(--text-lede); margin-top: 1.5rem; max-width: 34ch; }
.lede strong { color: var(--text); font-weight: 600; }
.cta-row { display: flex; gap: 14px; margin-top: 2.1rem; flex-wrap: wrap; }

.hero-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  list-style: none;
  margin: 2.4rem 0 0;
  padding: 0;
  font-size: 0.92rem;
  color: var(--text-3);
}
.hero-chips b { color: var(--text); font-variant-numeric: tabular-nums; }

/* hero visual */
.hero-visual { position: relative; }
.glow-icon {
  position: absolute;
  top: -54px;
  right: 6%;
  z-index: 3;
  filter: drop-shadow(0 18px 50px rgba(75, 140, 255, 0.5));
  animation: float 7s ease-in-out infinite;
}
.glow-icon img { width: 108px; height: 108px; border-radius: 24px; }

.window {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--surface), var(--bg-2));
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.55), inset 0 1px 0 rgba(255, 255, 255, 0.04);
  overflow: hidden;
}
.window-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: color-mix(in oklab, var(--surface-2) 80%, black);
  border-bottom: 1px solid var(--line-soft);
}
.dot { width: 11px; height: 11px; border-radius: 50%; }
.dot-r { background: #ff5f57; } .dot-y { background: #febc2e; } .dot-g { background: #28c840; }
.window-title {
  margin-left: 10px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-3);
}
.term {
  margin: 0;
  padding: 20px 22px 24px;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  line-height: 1.75;
  color: var(--text-2);
  white-space: pre-wrap;
  word-break: break-word;
}
.c-prompt { color: var(--cyan); }
.c-path { color: var(--violet); }
.c-cmd { color: var(--text); }
.c-ok { color: #41d977; }
.c-num { color: var(--magenta); font-weight: 600; }
.c-dim { color: var(--text-3); }
.caret { color: var(--cyan); animation: blink 1.1s step-end infinite; }

/* ---- stack strip ---- */
.stack-strip {
  border-block: 1px solid var(--line-soft);
  background: color-mix(in oklab, var(--bg-2) 70%, transparent);
  overflow: hidden;
}
.ticker {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 20px 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 14px;
  list-style: none;
  justify-content: center;
}
.ticker li {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-2);
  padding: 6px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
}

/* ---- sections ---- */
.section { max-width: var(--maxw); margin: 0 auto; padding: var(--space-section) 24px; }
.section-head { max-width: 56ch; margin-bottom: clamp(2.5rem, 1.5rem + 3vw, 4rem); }
.kicker {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--violet);
  margin-bottom: 1rem;
}
.section h2 { font-size: var(--text-h2); }
.section-sub { color: var(--text-2); margin-top: 1.1rem; font-size: 1.12rem; }

/* ---- bento ---- */
.bento {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.card {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
  background: linear-gradient(180deg, var(--surface), var(--bg-2));
  overflow: hidden;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}
.card::before {
  content: "";
  position: absolute;
  inset: 0;
  padding: 1px;
  border-radius: inherit;
  background: var(--grad);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity var(--dur) var(--ease);
}
.card:hover { transform: translateY(-4px); box-shadow: 0 22px 50px rgba(0, 0, 0, 0.5); }
.card:hover::before { opacity: 0.9; }
.card-lg { grid-column: span 1; grid-row: span 2; }
.card-wide { grid-column: span 2; }
.card-glyph {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  width: 52px; height: 52px;
  display: grid; place-items: center;
  border-radius: 13px;
  background: var(--grad-soft);
  border: 1px solid var(--line);
  margin-bottom: 18px;
}
.card h3 { font-size: 1.28rem; margin-bottom: 0.6rem; }
.card p { color: var(--text-2); font-size: 0.98rem; }
.card code { font-family: var(--font-mono); font-size: 0.85em; color: var(--cyan); background: rgba(52,214,238,0.08); padding: 1px 5px; border-radius: 5px; }
.tags { display: flex; flex-wrap: wrap; gap: 7px; list-style: none; margin: 16px 0 0; padding: 0; }
.tags li {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-3);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 3px 8px;
}

/* ---- architecture ---- */
.section-arch { background: radial-gradient(80% 120% at 50% 0%, rgba(75,140,255,0.06), transparent 60%); }
.arch {
  display: grid;
  gap: 10px;
  max-width: 760px;
  margin: 0 auto;
}
.layer {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 24px 22px 96px;
  background: linear-gradient(180deg, var(--surface), var(--bg-2));
}
.layer-tag {
  position: absolute;
  left: 22px; top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #07101c;
  background: var(--grad);
  padding: 5px 10px;
  border-radius: 7px;
  font-weight: 700;
}
.layer h4 { font-size: 1.12rem; margin-bottom: 4px; }
.layer p { color: var(--text-2); font-size: 0.95rem; }
.layer-core { border-color: color-mix(in oklab, var(--violet) 40%, var(--line)); }
.arch-arrow { text-align: center; color: var(--text-3); font-size: 1.1rem; line-height: 1; }

/* ---- highlights ---- */
.highlights { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.hl {
  border-left: 2px solid transparent;
  border-image: var(--grad) 1;
  padding: 4px 0 4px 22px;
}
.hl h3 { font-size: 1.18rem; margin-bottom: 0.5rem; }
.hl p { color: var(--text-2); font-size: 1rem; }
.hl code { font-family: var(--font-mono); font-size: 0.85em; color: var(--cyan); }

/* ---- closing ---- */
.closing {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: var(--space-section) 24px;
  text-align: center;
}
.closing h2 { font-size: var(--text-h2); }
.closing p { color: var(--text-2); margin: 1rem 0 2rem; }
.closing code { font-family: var(--font-mono); color: var(--cyan); }

/* ---- footer ---- */
.site-footer { border-top: 1px solid var(--line-soft); background: var(--bg-2); }
.foot-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 30px 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 26px;
  color: var(--text-3);
  font-size: 0.92rem;
}
.foot-brand { font-weight: 700; letter-spacing: -0.03em; color: var(--text); }
.foot-by { margin-right: auto; }
.foot-by a, .foot-links a { color: var(--text-2); transition: color var(--dur) var(--ease); }
.foot-by a:hover, .foot-links a:hover { color: var(--cyan); }
.foot-links { display: flex; gap: 20px; }

/* ---- reveal animation ---- */
[data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
[data-reveal].in { opacity: 1; transform: none; }

@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }

/* ---- responsive ---- */
@media (max-width: 880px) {
  .hero { grid-template-columns: 1fr; }
  .hero-visual { order: -1; }
  .glow-icon { top: -38px; right: 4%; }
  .glow-icon img { width: 84px; height: 84px; }
  .nav-links { display: none; }
  .bento { grid-template-columns: repeat(2, 1fr); }
  .card-lg { grid-row: span 1; }
  .card-wide { grid-column: span 2; }
  .highlights { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  body { font-size: 16px; }
  .bento { grid-template-columns: 1fr; }
  .card-wide { grid-column: span 1; }
  .foot-by { margin-right: 0; flex-basis: 100%; }
}

/* ---- accessibility ---- */
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; border-radius: 4px; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
  [data-reveal] { opacity: 1; transform: none; }
}