/* Atlas marketing site — design system + components.
   Theme-aware (dark default, light supported), responsive, no external deps.
   Kept CSP-friendly: all styling lives here, none inline. */

:root {
  color-scheme: dark light;

  /* Neutral ramp (dark-first) */
  --ink-900: #07090c;
  --ink-850: #0b0e13;
  --ink-800: #10141b;
  --ink-700: #171c25;
  --ink-600: #212836;
  --ink-500: #313a4d;
  --line: #232a37;
  --fg: #e8ecf3;
  --fg-muted: #9aa6ba;
  --fg-faint: #6b7688;

  /* Brand */
  --accent: #5b6cff;      /* electric indigo — primary */
  --accent-2: #38e0c8;    /* signal teal — determinism/cache */
  --amber: #f5b544;       /* budget/cost motif */
  --danger: #ff6b6b;

  --bg: var(--ink-900);
  --surface: var(--ink-800);
  --surface-2: var(--ink-700);
  --card: linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,.008));

  --radius: 14px;
  --radius-sm: 9px;
  --maxw: 1120px;
  --shadow: 0 1px 2px rgba(0,0,0,.4), 0 12px 40px -12px rgba(0,0,0,.6);
  --font: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", "Cascadia Code", Consolas, monospace;
}

:root[data-theme="light"] {
  --bg: #f7f8fb;
  --surface: #ffffff;
  --surface-2: #f0f2f7;
  --line: #e3e7ef;
  --fg: #10141b;
  --fg-muted: #4a5568;
  --fg-faint: #7a8699;
  --card: linear-gradient(180deg, rgba(10,14,25,.02), rgba(10,14,25,.005));
  --shadow: 0 1px 2px rgba(16,20,27,.06), 0 18px 40px -20px rgba(16,20,27,.18);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #f7f8fb; --surface: #ffffff; --surface-2: #f0f2f7; --line: #e3e7ef;
    --fg: #10141b; --fg-muted: #4a5568; --fg-faint: #7a8699;
    --card: linear-gradient(180deg, rgba(10,14,25,.02), rgba(10,14,25,.005));
    --shadow: 0 1px 2px rgba(16,20,27,.06), 0 18px 40px -20px rgba(16,20,27,.18);
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 .5em; font-weight: 700; }
h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.5rem); }
h3 { font-size: 1.2rem; }
p { margin: 0 0 1rem; color: var(--fg-muted); }
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
section { padding: 96px 0; }
.eyebrow {
  text-transform: uppercase; letter-spacing: .16em; font-size: .78rem;
  font-weight: 600; color: var(--accent-2); margin-bottom: 14px;
}
.lead { font-size: 1.18rem; color: var(--fg-muted); max-width: 62ch; }
.center { text-align: center; }
.center .lead { margin-left: auto; margin-right: auto; }

/* ---- Buttons ---- */
.btn {
  display: inline-flex; align-items: center; gap: .5em;
  padding: .8em 1.3em; border-radius: var(--radius-sm);
  font-weight: 600; font-size: .98rem; cursor: pointer;
  border: 1px solid transparent; transition: transform .12s ease, background .2s, border-color .2s;
  white-space: nowrap;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--accent); color: #fff; box-shadow: 0 8px 24px -10px var(--accent); }
.btn-primary:hover { background: #6d7cff; }
.btn-ghost { background: transparent; color: var(--fg); border-color: var(--line); }
.btn-ghost:hover { background: var(--surface-2); }
.btn-lg { padding: 1em 1.6em; font-size: 1.05rem; }

/* ---- Header ---- */
header.site {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(150%) blur(12px);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; gap: 20px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--fg); font-size: 1.1rem; letter-spacing: -.02em; }
.brand:hover { text-decoration: none; }
.brand .mark {
  width: 26px; height: 26px; border-radius: 7px;
  background: conic-gradient(from 210deg, var(--accent), var(--accent-2), var(--amber), var(--accent));
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.15);
}
.nav .spacer { flex: 1; }
.nav-links { display: flex; gap: 22px; align-items: center; }
.nav-links a { color: var(--fg-muted); font-size: .95rem; font-weight: 500; }
.nav-links a:hover { color: var(--fg); text-decoration: none; }
.icon-btn {
  background: transparent; border: 1px solid var(--line); color: var(--fg-muted);
  width: 38px; height: 38px; border-radius: 9px; cursor: pointer; font-size: 1rem;
  display: inline-flex; align-items: center; justify-content: center;
}
.icon-btn:hover { color: var(--fg); background: var(--surface-2); }
.menu-toggle { display: none; }
@media (max-width: 860px) {
  .nav-links { display: none; }
  .menu-toggle { display: inline-flex; }
  .nav-links.open {
    display: flex; position: absolute; top: 64px; left: 0; right: 0;
    flex-direction: column; gap: 0; background: var(--surface); border-bottom: 1px solid var(--line); padding: 8px 0;
  }
  .nav-links.open a { padding: 12px 24px; }
}

/* ---- Hero ---- */
.hero { padding: 88px 0 72px; position: relative; }
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background:
    radial-gradient(60% 50% at 20% 0%, color-mix(in srgb, var(--accent) 22%, transparent), transparent 70%),
    radial-gradient(50% 40% at 90% 10%, color-mix(in srgb, var(--accent-2) 16%, transparent), transparent 70%);
  opacity: .5; pointer-events: none;
}
.hero .badge {
  display: inline-flex; align-items: center; gap: 8px; font-size: .82rem; font-weight: 600;
  color: var(--fg-muted); background: var(--surface); border: 1px solid var(--line);
  padding: 6px 12px; border-radius: 999px; margin-bottom: 22px;
}
.hero .badge .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent-2); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent-2) 25%, transparent); }
.hero h1 { max-width: 16ch; }
.hero h1 .grad {
  background: linear-gradient(100deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero .lead { margin-top: 8px; }
.cta-row { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 30px; align-items: center; }
.cta-row .muted { color: var(--fg-faint); font-size: .9rem; }

/* Terminal mock */
.terminal {
  margin-top: 44px; border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--line); background: var(--ink-850); box-shadow: var(--shadow);
}
.terminal .bar { display: flex; align-items: center; gap: 8px; padding: 12px 16px; background: var(--ink-800); border-bottom: 1px solid var(--line); }
.terminal .bar .dots { display: flex; gap: 7px; }
.terminal .bar .dots i { width: 11px; height: 11px; border-radius: 50%; background: var(--ink-600); }
.terminal .bar .title { color: var(--fg-faint); font-size: .82rem; font-family: var(--mono); margin-left: 6px; }
.terminal pre {
  margin: 0; padding: 20px 22px; overflow-x: auto; font-family: var(--mono);
  font-size: .86rem; line-height: 1.7; color: #cdd6e6;
}
.terminal .c-prompt { color: var(--accent-2); } .terminal .c-cmd { color: var(--fg); }
.terminal .c-dim { color: var(--fg-faint); } .terminal .c-ok { color: var(--accent-2); }
.terminal .c-cost { color: var(--amber); } .terminal .c-accent { color: var(--accent); }

/* ---- Feature grid / promises ---- */
.grid { display: grid; gap: 22px; }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 860px) { .grid.cols-3, .grid.cols-2 { grid-template-columns: 1fr; } }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px; background-color: var(--surface);
}
.card .ic {
  width: 42px; height: 42px; border-radius: 11px; display: grid; place-items: center;
  font-size: 1.25rem; margin-bottom: 16px;
  background: color-mix(in srgb, var(--accent) 14%, transparent); color: var(--accent);
}
.card.teal .ic { background: color-mix(in srgb, var(--accent-2) 16%, transparent); color: var(--accent-2); }
.card.amber .ic { background: color-mix(in srgb, var(--amber) 18%, transparent); color: var(--amber); }
.card h3 { margin-bottom: 6px; }
.card p { margin: 0; font-size: .96rem; }

/* how it works */
.steps { counter-reset: step; display: grid; gap: 18px; }
.step { display: flex; gap: 18px; align-items: flex-start; }
.step .n {
  counter-increment: step; flex: none; width: 34px; height: 34px; border-radius: 50%;
  display: grid; place-items: center; font-weight: 700; font-size: .95rem;
  background: var(--surface-2); border: 1px solid var(--line); color: var(--accent);
}
.step .n::before { content: counter(step); }
.step h3 { margin-bottom: 2px; }
.step p { margin: 0; font-size: .96rem; }

/* ---- Pricing ---- */
.pricing { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; align-items: stretch; }
@media (max-width: 980px) { .pricing { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .pricing { grid-template-columns: 1fr; } }
.plan { display: flex; flex-direction: column; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; }
.plan.popular { border-color: color-mix(in srgb, var(--accent) 55%, var(--line)); box-shadow: 0 0 0 1px color-mix(in srgb, var(--accent) 40%, transparent), var(--shadow); position: relative; }
.plan.popular::after { content: "Most popular"; position: absolute; top: -11px; left: 26px; background: var(--accent); color: #fff; font-size: .72rem; font-weight: 700; padding: 3px 10px; border-radius: 999px; letter-spacing: .03em; }
.plan .name { font-weight: 700; font-size: 1.15rem; }
.plan .price { font-size: 2rem; font-weight: 800; margin: 10px 0 2px; letter-spacing: -.03em; }
.plan .price small { font-size: .9rem; font-weight: 500; color: var(--fg-faint); }
.plan .desc { font-size: .9rem; color: var(--fg-muted); min-height: 2.6em; }
.plan ul { list-style: none; padding: 0; margin: 18px 0 22px; display: grid; gap: 9px; }
.plan li { font-size: .92rem; color: var(--fg-muted); padding-left: 26px; position: relative; }
.plan li::before { content: "✓"; position: absolute; left: 0; color: var(--accent-2); font-weight: 700; }
.plan li.no { color: var(--fg-faint); } .plan li.no::before { content: "–"; color: var(--fg-faint); }
.plan .btn { margin-top: auto; justify-content: center; }
.plan .soon { font-size: .72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; color: var(--amber); }

/* ---- FAQ ---- */
.faq details { border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 4px 20px; margin-bottom: 12px; background: var(--surface); }
.faq summary { cursor: pointer; font-weight: 600; padding: 14px 0; list-style: none; display: flex; justify-content: space-between; align-items: center; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--accent); font-size: 1.3rem; }
.faq details[open] summary::after { content: "–"; }
.faq details p { padding-bottom: 16px; margin: 0; font-size: .96rem; }

/* ---- CTA band ---- */
.band { background: linear-gradient(120deg, color-mix(in srgb, var(--accent) 16%, var(--surface)), color-mix(in srgb, var(--accent-2) 12%, var(--surface))); border: 1px solid var(--line); border-radius: 20px; padding: 56px; text-align: center; }
.band h2 { margin-bottom: 10px; }

/* code inline */
code.k { font-family: var(--mono); font-size: .88em; background: var(--surface-2); border: 1px solid var(--line); border-radius: 6px; padding: .12em .45em; color: var(--fg); }

/* ---- Footer ---- */
footer.site { border-top: 1px solid var(--line); padding: 56px 0 40px; background: var(--surface); }
.foot-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 32px; }
@media (max-width: 780px) { .foot-grid { grid-template-columns: 1fr 1fr; } }
.foot-grid h4 { font-size: .82rem; text-transform: uppercase; letter-spacing: .12em; color: var(--fg-faint); margin: 0 0 14px; }
.foot-grid a { display: block; color: var(--fg-muted); font-size: .93rem; margin-bottom: 9px; }
.foot-grid a:hover { color: var(--fg); text-decoration: none; }
.foot-bottom { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; margin-top: 44px; padding-top: 22px; border-top: 1px solid var(--line); color: var(--fg-faint); font-size: .86rem; }
.foot-bottom a { color: var(--fg-faint); }

/* ---- Legal / doc pages ---- */
.doc { max-width: 780px; margin: 0 auto; padding: 56px 24px 96px; }
.doc h1 { font-size: 2.2rem; }
.doc h2 { font-size: 1.35rem; margin-top: 2em; }
.doc h3 { font-size: 1.08rem; margin-top: 1.5em; }
.doc p, .doc li { color: var(--fg-muted); }
.doc ul { padding-left: 1.2em; }
.doc li { margin-bottom: .4em; }
.doc .meta { color: var(--fg-faint); font-size: .9rem; }
.doc .note { background: color-mix(in srgb, var(--amber) 10%, var(--surface)); border: 1px solid color-mix(in srgb, var(--amber) 35%, var(--line)); border-radius: var(--radius-sm); padding: 14px 18px; font-size: .9rem; }
.doc table { width: 100%; border-collapse: collapse; margin: 1em 0; font-size: .92rem; }
.doc th, .doc td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.doc th { color: var(--fg); font-weight: 600; }
.doc .back { font-size: .9rem; }

/* ---- Cookie consent ---- */
.cc-banner {
  position: fixed; z-index: 100; left: 16px; right: 16px; bottom: 16px; margin: 0 auto;
  max-width: 560px; background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow); padding: 22px;
  transform: translateY(140%); transition: transform .35s cubic-bezier(.2,.8,.2,1);
}
.cc-banner.show { transform: translateY(0); }
.cc-banner h3 { font-size: 1.05rem; margin-bottom: 6px; }
.cc-banner p { font-size: .9rem; margin-bottom: 16px; }
.cc-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.cc-actions .btn { font-size: .9rem; padding: .65em 1.1em; }
.cc-link { background: none; border: none; color: var(--accent); cursor: pointer; font: inherit; font-size: .9rem; padding: 0; text-decoration: underline; }

.cc-modal { position: fixed; inset: 0; z-index: 110; display: none; align-items: center; justify-content: center; padding: 20px; background: rgba(0,0,0,.55); }
.cc-modal.show { display: flex; }
.cc-dialog { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); max-width: 540px; width: 100%; max-height: 85vh; overflow-y: auto; box-shadow: var(--shadow); padding: 28px; }
.cc-dialog h2 { font-size: 1.4rem; }
.cc-cat { border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 16px 18px; margin: 14px 0; }
.cc-cat .row { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.cc-cat h3 { font-size: 1rem; margin: 0; }
.cc-cat p { font-size: .87rem; margin: 8px 0 0; }
.cc-cat .locked { font-size: .78rem; color: var(--accent-2); font-weight: 600; }
/* toggle */
.switch { position: relative; display: inline-block; width: 44px; height: 25px; flex: none; }
.switch input { opacity: 0; width: 0; height: 0; }
.switch .track { position: absolute; inset: 0; background: var(--ink-500); border-radius: 999px; transition: .2s; }
:root[data-theme="light"] .switch .track { background: #c8cede; }
.switch .track::before { content: ""; position: absolute; height: 19px; width: 19px; left: 3px; top: 3px; background: #fff; border-radius: 50%; transition: .2s; }
.switch input:checked + .track { background: var(--accent); }
.switch input:checked + .track::before { transform: translateX(19px); }
.switch input:disabled + .track { opacity: .6; }
.cc-dialog .cc-actions { margin-top: 22px; }

.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }