/* SerialMint — "Studio Dark" theme, amber + teal */
:root {
  --bg: #0c0d11;
  --bg-soft: #10131a;
  --panel: #141926;
  --panel-2: #1a2233;
  --line: #28324a;
  --ink: #f3f1ea;
  --muted: #a3a8ba;
  --faint: #6e7691;
  --amber: #ffb454;
  --amber-deep: #d98f2b;
  --teal: #4ae3b5;
  --red: #ff6b6b;
  --radius: 14px;
  --font-display: "Space Grotesk", "Segoe UI", system-ui, sans-serif;
  --font-body: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16.5px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* ambient studio glow */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(640px 320px at 12% -4%, rgba(255, 180, 84, .12), transparent 60%),
    radial-gradient(720px 360px at 88% 6%, rgba(74, 227, 181, .08), transparent 60%),
    radial-gradient(900px 500px at 50% 110%, rgba(255, 180, 84, .05), transparent 60%);
}

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 22px; position: relative; z-index: 1; }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(12, 13, 17, .86);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap { display: flex; align-items: center; gap: 26px; padding-top: 13px; padding-bottom: 13px; }
.brand { display: flex; align-items: center; gap: 11px; text-decoration: none; color: var(--ink); }
.brand svg { width: 34px; height: 34px; flex: none; }
.brand-name { font-family: var(--font-display); font-weight: 700; font-size: 21px; letter-spacing: .2px; }
.brand-name em { font-style: normal; color: var(--amber); }
.nav { margin-left: auto; display: flex; gap: 4px; }
.nav a {
  color: var(--muted); text-decoration: none; font-size: 14.5px; font-weight: 500;
  padding: 8px 13px; border-radius: 9px;
}
.nav a:hover { color: var(--ink); background: var(--panel); }
.nav a.cta { background: var(--amber); color: #171106; font-weight: 700; }
.nav a.cta:hover { background: #ffc67c; color: #171106; }

/* ---------- hero ---------- */
.hero { padding: 54px 0 8px; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 9px;
  font-size: 13px; font-weight: 600; letter-spacing: 1.6px; text-transform: uppercase;
  color: var(--amber); margin-bottom: 16px;
}
.eyebrow .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--amber); box-shadow: 0 0 12px var(--amber); animation: pulse 2.2s infinite; }
@keyframes pulse { 50% { opacity: .45; } }
.hero h1 {
  font-family: var(--font-display); font-size: clamp(34px, 5.2vw, 58px);
  line-height: 1.06; letter-spacing: -1px; margin: 0 0 14px; max-width: 16ch;
}
.hero h1 .hl { color: var(--amber); }
.hero .lede { color: var(--muted); font-size: 18px; max-width: 62ch; margin: 0 0 30px; }
.hero .lede strong { color: var(--ink); }

/* ---------- generator console ---------- */
.console {
  background: linear-gradient(180deg, var(--panel), var(--bg-soft));
  border: 1px solid var(--line);
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 30px 80px rgba(0, 0, 0, .45), inset 0 1px 0 rgba(255,255,255,.05);
  margin-bottom: 26px;
}
.console-bar {
  display: flex; align-items: center; gap: 10px;
  padding: 13px 18px; border-bottom: 1px solid var(--line);
  background: rgba(255,255,255,.015);
  flex-wrap: wrap;
}
.traffic { display: flex; gap: 7px; }
.traffic i { width: 11px; height: 11px; border-radius: 50%; display: block; }
.traffic i:nth-child(1) { background: #ff5f57; } .traffic i:nth-child(2) { background: #febc2e; } .traffic i:nth-child(3) { background: #28c840; }
.console-title { font-family: var(--font-mono); font-size: 12.5px; color: var(--faint); letter-spacing: .4px; }
.privacy-chip {
  margin-left: auto; display: inline-flex; align-items: center; gap: 7px;
  font-size: 12.5px; font-weight: 600; color: var(--teal);
  border: 1px solid rgba(74, 227, 181, .35); border-radius: 999px; padding: 5px 12px;
  background: rgba(74, 227, 181, .07);
}
.privacy-chip svg { width: 14px; height: 14px; }
.console-body { padding: 26px; }

/* controls */
.controls { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 18px; }
.control {
  background: rgba(255,255,255,.015);
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 15px 16px;
}
.control label { display: block; font-size: 12.5px; font-weight: 700; text-transform: uppercase; letter-spacing: 1.1px; color: var(--muted); margin-bottom: 9px; }
.control input[type="number"], .control select, .control input[type="text"] {
  width: 100%; background: #0d1120; color: var(--ink);
  border: 1px solid var(--line); border-radius: 9px;
  font-family: var(--font-mono); font-size: 15px; padding: 10px 12px; outline: none;
}
.control input:focus, .control select:focus { border-color: var(--amber); }
.control select { font-family: var(--font-body); }
.control .hint { font-size: 12.5px; color: var(--faint); margin: 8px 0 0; }
.control input[type="text"]::placeholder { color: var(--faint); }

.format-preview {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  background: #0d1120; border: 1px dashed #33405c; border-radius: var(--radius);
  padding: 14px 18px; margin-bottom: 18px;
}
.format-preview .lbl { font-size: 12.5px; font-weight: 700; text-transform: uppercase; letter-spacing: 1.1px; color: var(--faint); }
.format-preview code { font-family: var(--font-mono); font-size: 16px; color: var(--amber); letter-spacing: 1px; }

.toolbar { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 18px; }
.btn {
  appearance: none; border: 1px solid var(--line); cursor: pointer;
  background: var(--panel-2); color: var(--ink);
  font-family: var(--font-body); font-weight: 600; font-size: 14.5px;
  padding: 11px 18px; border-radius: 11px;
  display: inline-flex; align-items: center; gap: 9px;
  transition: transform .08s, background .15s, border-color .15s;
}
.btn svg { width: 17px; height: 17px; }
.btn:hover { background: #232c44; border-color: #35415e; }
.btn:active { transform: translateY(1px); }
.btn.primary { background: var(--amber); border-color: var(--amber); color: #171106; }
.btn.primary:hover { background: #ffc67c; }
.btn.ghost { background: transparent; }
.btn:disabled { opacity: .45; cursor: not-allowed; }

/* output */
.serial-list {
  background: #0b0e18; border: 1px solid var(--line); border-radius: var(--radius);
  max-height: 420px; overflow-y: auto; padding: 10px;
}
.serial-list .empty { color: var(--faint); font-family: var(--font-mono); font-size: 14px; text-align: center; padding: 34px 16px; margin: 0; }
.serial-row {
  display: flex; align-items: center; gap: 12px;
  font-family: var(--font-mono); font-size: 15.5px; letter-spacing: .6px;
  padding: 10px 14px; border-radius: 9px; cursor: pointer;
  color: var(--ink);
}
.serial-row:hover { background: rgba(255, 180, 84, .06); }
.serial-row .idx { color: var(--faint); font-size: 12px; min-width: 34px; }
.serial-row .val { flex: 1; word-break: break-all; }
.serial-row .copied { font-size: 11.5px; color: var(--teal); opacity: 0; transition: opacity .2s; }
.serial-row.flash .copied { opacity: 1; }
.output-meta {
  display: flex; gap: 26px; flex-wrap: wrap; margin-top: 14px;
}
.output-meta .stat .num { font-family: var(--font-display); font-size: 22px; font-weight: 700; color: var(--amber); }
.output-meta .stat .lbl { font-size: 12px; color: var(--faint); text-transform: uppercase; letter-spacing: 1px; }
.error-box {
  border: 1px solid rgba(255, 107, 107, .45); background: rgba(255, 107, 107, .07);
  border-radius: var(--radius); padding: 18px 20px; color: #ffd7d7; font-size: 15px; margin-bottom: 18px;
}
.error-box strong { color: #fff; }

/* ---------- content sections ---------- */
.section { padding: 56px 0 8px; }
.section h2 {
  font-family: var(--font-display); font-size: clamp(26px, 3.4vw, 36px);
  letter-spacing: -.5px; margin: 0 0 8px;
}
.section h2 .hl { color: var(--amber); }
.section .sub { color: var(--muted); max-width: 68ch; margin: 0 0 30px; font-size: 17px; }

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.step {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 24px; position: relative;
}
.step .n {
  font-family: var(--font-mono); font-size: 13px; color: var(--amber);
  border: 1px solid rgba(255, 180, 84, .4); border-radius: 8px;
  display: inline-block; padding: 3px 10px; margin-bottom: 14px;
}
.step h3 { font-family: var(--font-display); margin: 0 0 8px; font-size: 19px; }
.step p { margin: 0; color: var(--muted); font-size: 15px; }
.step svg { width: 30px; height: 30px; margin-bottom: 12px; color: var(--amber); }

.cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.card {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 24px;
}
.card h3 { font-family: var(--font-display); margin: 0 0 8px; font-size: 19px; }
.card h3 a { color: var(--ink); text-decoration: none; }
.card h3 a:hover { color: var(--amber); }
.card p { margin: 0 0 12px; color: var(--muted); font-size: 15px; }
.card .more { color: var(--amber); font-weight: 600; font-size: 14.5px; text-decoration: none; }
.card .more:hover { text-decoration: underline; }
.card svg { width: 28px; height: 28px; margin-bottom: 10px; color: var(--teal); }

.privacy-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; align-items: start; }
.privacy-card {
  background: linear-gradient(160deg, rgba(74, 227, 181, .09), var(--panel) 55%);
  border: 1px solid rgba(74, 227, 181, .3); border-radius: var(--radius); padding: 26px;
}
.privacy-card h3 { font-family: var(--font-display); margin: 0 0 10px; font-size: 20px; display: flex; align-items: center; gap: 10px; }
.privacy-card h3 svg { width: 22px; height: 22px; color: var(--teal); }
.privacy-card p, .privacy-card li { color: var(--muted); font-size: 15px; }
.privacy-card ul { margin: 10px 0 0; padding-left: 20px; }
.privacy-card li { margin-bottom: 6px; }
.privacy-card li strong { color: var(--ink); }

table.info-table { width: 100%; border-collapse: collapse; font-size: 15px; background: var(--panel); border-radius: var(--radius); overflow: hidden; }
.info-table th, .info-table td { text-align: left; padding: 13px 16px; border-bottom: 1px solid var(--line); }
.info-table th { font-family: var(--font-display); font-size: 14px; text-transform: uppercase; letter-spacing: 1px; color: var(--amber); background: rgba(255, 180, 84, .05); }
.info-table td { color: var(--muted); }
.info-table td code, .prose code { font-family: var(--font-mono); font-size: 13.5px; background: #0d1120; padding: 2px 8px; border-radius: 6px; color: var(--amber); }
.info-table tr:last-child td { border-bottom: none; }
.table-scroll { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--line); }

.faq { max-width: 820px; }
.faq details {
  border: 1px solid var(--line); border-radius: var(--radius);
  margin-bottom: 12px; background: var(--panel); overflow: hidden;
}
.faq summary {
  cursor: pointer; padding: 18px 22px; font-weight: 650; font-size: 16.5px;
  font-family: var(--font-display); list-style: none; display: flex; justify-content: space-between; gap: 14px; align-items: center;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary .plus { color: var(--amber); font-size: 22px; flex: none; font-weight: 400; }
.faq details[open] summary .plus { transform: rotate(45deg); }
.faq .answer { padding: 0 22px 20px; color: var(--muted); font-size: 15.5px; }
.faq .answer strong { color: var(--ink); }

.limits {
  border: 1px solid rgba(255, 180, 84, .35); border-radius: var(--radius);
  background: rgba(255, 180, 84, .05); padding: 26px 28px; max-width: 860px; margin-bottom: 26px;
}
.limits h3 { font-family: var(--font-display); margin: 0 0 10px; color: var(--amber); font-size: 19px; display: flex; align-items: center; gap: 10px; }
.limits h3 svg { width: 20px; height: 20px; }
.limits ul { margin: 0; padding-left: 20px; color: var(--muted); font-size: 15px; }
.limits li { margin-bottom: 8px; }
.limits li strong { color: var(--ink); }

.callout {
  border: 1px solid rgba(74, 227, 181, .3); border-radius: var(--radius);
  background: rgba(74, 227, 181, .05); padding: 22px 24px; max-width: 860px;
}
.callout h3 { font-family: var(--font-display); margin: 0 0 8px; color: var(--teal); font-size: 19px; }
.callout p { margin: 0; color: var(--muted); font-size: 15px; }

.cta-box {
  border: 1px solid rgba(74, 227, 181, .3); border-radius: var(--radius);
  background: rgba(74, 227, 181, .05); padding: 26px 28px; max-width: 860px; margin-top: 30px;
}
.cta-box h3 { font-family: var(--font-display); margin: 0 0 8px; color: var(--teal); font-size: 20px; }
.cta-box p { margin: 0 0 16px; color: var(--muted); }
.cta-box .btn { text-decoration: none; }

/* ---------- footer ---------- */
footer { border-top: 1px solid var(--line); margin-top: 70px; background: #090b10; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 34px; padding-top: 40px; padding-bottom: 30px; }
.foot-brand { max-width: 320px; }
.foot-brand p { color: var(--faint); font-size: 14px; }
.foot-col h4 { font-size: 13px; text-transform: uppercase; letter-spacing: 1.4px; color: var(--faint); margin: 0 0 12px; }
.foot-col a { display: block; color: var(--muted); text-decoration: none; font-size: 14.5px; margin-bottom: 8px; }
.foot-col a:hover { color: var(--amber); }
.foot-base { width: 100%; border-top: 1px solid var(--line); padding-top: 18px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; color: var(--faint); font-size: 13px; }

/* ---------- inner pages ---------- */
.page-hero { padding: 52px 0 10px; }
.page-hero .eyebrow { margin-bottom: 12px; }
.page-hero h1 { font-family: var(--font-display); font-size: clamp(30px, 4.4vw, 44px); letter-spacing: -.8px; margin: 0 0 10px; }
.page-hero h1 .hl { color: var(--amber); }
.page-hero p { color: var(--muted); max-width: 66ch; }
.prose { max-width: 760px; padding-bottom: 30px; }
.prose h2 { font-family: var(--font-display); font-size: 24px; margin: 38px 0 10px; }
.prose h3 { font-family: var(--font-display); font-size: 18px; margin: 26px 0 8px; }
.prose p, .prose li { color: var(--muted); font-size: 16px; }
.prose strong { color: var(--ink); }
.prose a { color: var(--amber); }
.prose ul, .prose ol { padding-left: 22px; }
.prose li { margin-bottom: 7px; }
.prose .table-scroll { margin: 18px 0; }
.updated { font-size: 13.5px; color: var(--faint); font-family: var(--font-mono); }

/* ---------- responsive ---------- */
@media (max-width: 860px) {
  .steps { grid-template-columns: 1fr; }
  .cards { grid-template-columns: 1fr; }
  .privacy-grid { grid-template-columns: 1fr; }
  .controls { grid-template-columns: 1fr; }
  .nav a:not(.cta) { display: none; }
  .console-body { padding: 18px; }
}
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}