:root {
  color-scheme: dark;
  --bg: #0B0F19;
  --panel: #0f172a;
  --line: rgb(148 163 184 / 0.22);
  --text: #e5e7eb;
  --muted: #a3b0c2;
  --cyan: #06B6D4;
  --emerald: #10B981;
  --amber: #F59E0B;
  --font-ui: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  min-block-size: 100dvh;
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(1px 1px at 12% 18%, #ffffff55, transparent 60%),
    radial-gradient(1px 1px at 78% 12%, #ffffff44, transparent 60%),
    radial-gradient(1.5px 1.5px at 34% 42%, #ffffff40, transparent 60%),
    radial-gradient(1px 1px at 90% 36%, #ffffff55, transparent 60%),
    radial-gradient(ellipse at 50% 0%, #16213a 0%, var(--bg) 60%),
    var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  line-height: 1.6;
}

main { flex: 1 0 auto; }

:focus-visible { outline: 3px solid #fbbf24; outline-offset: 3px; }

.skip-link {
  position: absolute; inset-block-start: 0; inset-inline-start: 0;
  padding: .5rem .75rem; background: #fbbf24; color: #111; translate: 0 -120%; z-index: 10;
}
.skip-link:focus { translate: 0 0; }

.wrap { inline-size: min(100% - 2rem, 62rem); margin-inline: auto; }

h1, h2, h3 { line-height: 1.25; text-wrap: balance; }
p { text-wrap: pretty; }
code { font-family: var(--font-mono); font-size: .9em; background: rgb(148 163 184 / .14); padding: .1em .35em; border-radius: .3em; overflow-wrap: anywhere; }
.muted { color: var(--muted); }
.small { font-size: .88rem; }

/* ---------- Hero ---------- */
.hero { padding-block: clamp(3rem, 8vw, 6rem) clamp(2rem, 5vw, 3.5rem); text-align: center; }
.eyebrow { margin: 0 0 .5rem; color: #67e8f9; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; font-size: .8rem; }
.hero h1 { margin: 0 0 1rem; font-size: clamp(2.2rem, 1.4rem + 4vw, 3.6rem); }
.lead { margin: 0 auto 1.75rem; max-inline-size: 42rem; font-size: clamp(1.02rem, .95rem + .4vw, 1.2rem); color: #cbd5e1; }
.cta { display: flex; flex-wrap: wrap; justify-content: center; gap: .75rem; margin-block-end: 2rem; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-block-size: 44px; padding: .55rem 1.25rem; border-radius: .6rem;
  border: 1px solid var(--line); background: rgb(15 23 42 / .9); color: var(--text);
  text-decoration: none; font-weight: 600; font: inherit; font-weight: 600; cursor: pointer;
}
.btn:hover { border-color: #94a3b8; }
.btn-primary { background: var(--cyan); border-color: var(--cyan); color: #04202a; }
.btn-primary:hover { background: #22d3ee; border-color: #22d3ee; }

.endpoint {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: .5rem .75rem;
  padding: .75rem 1rem; margin-inline: auto; inline-size: fit-content; max-inline-size: 100%;
  background: var(--panel); border: 1px solid var(--line); border-radius: .75rem;
}
.endpoint-label { color: var(--muted); font-size: .82rem; }
.endpoint code { font-size: .95rem; background: none; padding: 0; color: #67e8f9; overflow-wrap: anywhere; }

/* ---------- Sections ---------- */
section.wrap { padding-block: clamp(1.75rem, 4vw, 2.75rem); }
section h2 { margin: 0 0 .75rem; font-size: clamp(1.4rem, 1.1rem + 1.2vw, 1.9rem); }

.steps {
  list-style: none; margin: 1.5rem 0 0; padding: 0; counter-reset: step;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr)); gap: 1rem;
}
.steps li {
  counter-increment: step; padding: 1.1rem 1.1rem 1.1rem 1.25rem; background: var(--panel);
  border: 1px solid var(--line); border-radius: .75rem; border-block-start: 3px solid var(--cyan);
}
.steps h3 { margin: 0 0 .35rem; font-size: 1.05rem; }
.steps h3::before { content: counter(step) ". "; color: #67e8f9; }
.steps p { margin: 0; color: #cbd5e1; font-size: .95rem; }

.cards {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 24rem), 1fr)); gap: 1rem; margin-block: 1.25rem .75rem;
}
.card { min-inline-size: 0; padding: 1.1rem; background: var(--panel); border: 1px solid var(--line); border-radius: .75rem; }
.card h3 { margin: 0 0 .25rem; font-size: 1.1rem; }
.card > p { margin: 0 0 .75rem; font-size: .9rem; }

/* ---------- Code + copy ---------- */
.code { position: relative; }
.code pre {
  margin: 0; padding: 1rem 4.75rem 1rem 1rem; overflow-x: auto; background: #070b14;
  border: 1px solid var(--line); border-radius: .6rem; font-size: .84rem; line-height: 1.55; tab-size: 2;
}
.code pre code { background: none; padding: 0; font-size: inherit; overflow-wrap: normal; white-space: pre; }
.code .copy { position: absolute; inset-block-start: .5rem; inset-inline-end: .5rem; }
.prompt pre { white-space: pre-wrap; }
.prompt pre code { white-space: pre-wrap; overflow-wrap: anywhere; }

.copy { position: relative; display: inline-block; }
.copy-btn {
  min-inline-size: 44px; min-block-size: 32px; padding: .2rem .7rem; border-radius: .45rem; cursor: pointer;
  border: 1px solid var(--line); background: #1e293b; color: var(--text); font: inherit; font-size: .8rem;
}
.copy-btn:hover { border-color: #94a3b8; }
.copy-btn[data-copied] { background: var(--emerald); border-color: var(--emerald); color: #03170f; }
.copy-btn[data-failed] { background: #f43f5e; border-color: #f43f5e; color: #fff; }
.tip {
  position: absolute; inset-block-start: calc(100% + .3rem); inset-inline-end: 0; z-index: 2;
  padding: .15rem .55rem; border-radius: .4rem; background: #e5e7eb; color: #0B0F19;
  font-size: .78rem; font-weight: 600; white-space: nowrap; opacity: 0; transition: opacity .15s; pointer-events: none;
}
.tip:not(:empty) { opacity: 1; }
.endpoint .tip { inset-inline-end: auto; inset-inline-start: 0; }

/* ---------- Tools + notes ---------- */
.tools-h { margin: 2rem 0 .5rem; font-size: 1.1rem; }
.tools { margin: 0; display: grid; gap: .75rem; }
.tools > div { padding: .8rem 1rem; background: var(--panel); border: 1px solid var(--line); border-radius: .6rem; }
.tools dt { margin: 0 0 .2rem; }
.tools dd { margin: 0; color: #cbd5e1; font-size: .93rem; }

.notes ul { margin: 0; padding-inline-start: 1.2rem; display: grid; gap: .6rem; color: #cbd5e1; }
.notes li::marker { color: var(--amber); }

/* ---------- Footer ---------- */
.footer { flex: none; margin-block-start: 2rem; padding-block: 1.5rem calc(1.5rem + env(safe-area-inset-bottom)); border-block-start: 1px solid var(--line); text-align: center; color: var(--muted); font-size: .88rem; }
.footer p { margin: 0; }

@media (max-width: 480px) {
  .cta .btn { inline-size: 100%; }
  .code pre { font-size: .78rem; }
  .endpoint { padding-inline: .75rem; }
  .endpoint code { font-size: clamp(.68rem, 3vw, .9rem); }
}