/* cardgate® backend — slim sibling of the marketing site's design system. */

:root {
  --bg: #050b16;
  --surface: #0e1a2e;
  --surface-2: #142440;
  --line: rgba(122, 168, 224, 0.14);
  --line-strong: rgba(122, 168, 224, 0.28);

  --ink: #e9f0fa;
  --ink-2: #b4c5dd;
  --mute: #7a8da8;
  --dim: #56688a;

  --brand: #4a8fd1;
  --brand-2: #2a6fb5;
  --cyan: #5fd4ff;
  --signal: #6fffb3;
  --danger: #ff7a7a;

  --f-display: "Montserrat", ui-sans-serif, system-ui, sans-serif;
  --f-body: "Inter", ui-sans-serif, system-ui, sans-serif;
  --f-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  --r-sm: 10px;
  --r: 16px;
  --r-lg: 22px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--f-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
  background-image:
    radial-gradient(900px 600px at 85% 5%, rgba(95, 163, 224, 0.28), transparent 60%),
    radial-gradient(700px 500px at 5% 25%, rgba(74, 143, 209, 0.22), transparent 65%),
    radial-gradient(800px 600px at 90% 60%, rgba(31, 75, 140, 0.32), transparent 60%),
    radial-gradient(700px 500px at 60% 95%, rgba(74, 143, 209, 0.18), transparent 65%),
    linear-gradient(180deg, #061328 0%, #050b16 40%, #07142a 70%, #050b16 100%);
  background-attachment: fixed;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }

::selection { background: var(--brand); color: white; }

/* ---- Background grid overlay ---- */
.grid-bg {
  position: fixed; inset: 0;
  background-image:
    linear-gradient(rgba(122,168,224,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(122,168,224,0.05) 1px, transparent 1px);
  background-size: 56px 56px;
  pointer-events: none;
  mask-image: radial-gradient(900px 700px at 50% 35%, black, transparent 80%);
}

/* ---- ® superscript ---- */
.reg {
  font-size: 0.55em;
  vertical-align: super;
  line-height: 0;
  letter-spacing: 0;
  font-weight: 500;
  margin-left: 0.04em;
  color: var(--brand);
  opacity: 0.85;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 11px 18px;
  border-radius: 999px;
  font-family: var(--f-display);
  font-weight: 500;
  font-size: 14px;
  letter-spacing: -0.01em;
  border: 1px solid transparent;
  transition: transform .15s ease, border-color .15s ease, background .15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: linear-gradient(180deg, #5fa3e0 0%, #2a6fb5 100%);
  color: white;
  box-shadow: 0 8px 24px -8px rgba(74,143,209,0.6),
              inset 0 1px 0 rgba(255,255,255,0.18);
}
.btn-ghost {
  border-color: var(--line-strong);
  color: var(--ink-2);
  background: rgba(20,36,64,0.4);
}
.btn-ghost:hover { border-color: var(--brand); color: var(--ink); }

/* ---- Eyebrow / mark ---- */
.api-mark {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(14, 26, 46, 0.6);
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-2);
}
.api-mark .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 12px var(--signal);
}

/* ---- Landing ---- */
.api-wrap {
  position: relative;
  max-width: 1100px;
  margin: 0 auto;
  padding: clamp(64px, 10vw, 120px) clamp(20px, 5vw, 56px);
}
.api-hero {
  margin-top: 32px;
  max-width: 700px;
}
.api-hero h1 {
  font-family: var(--f-display);
  font-weight: 600;
  font-size: clamp(34px, 5vw, 56px);
  line-height: 1.05;
  letter-spacing: -0.025em;
  margin: 18px 0;
}
.accent {
  background: linear-gradient(135deg, var(--cyan), var(--brand));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.lead {
  color: var(--ink-2);
  font-size: clamp(16px, 1.4vw, 18px);
  max-width: 60ch;
}
.api-cta {
  display: flex; gap: 12px; flex-wrap: wrap;
  margin-top: 32px;
}

/* ---- Endpoints grid ---- */
.api-endpoints { margin-top: clamp(64px, 8vw, 96px); }
.api-heading {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mute);
  margin-bottom: 20px;
}
.api-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 14px;
}
.api-card {
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 20px;
  background: linear-gradient(180deg, rgba(20,36,64,0.5) 0%, rgba(14,26,46,0.2) 100%);
  transition: border-color .2s ease, transform .2s ease;
}
.api-card:hover { border-color: var(--line-strong); transform: translateY(-1px); }
.api-card code {
  display: block;
  font-family: var(--f-mono);
  font-size: 14px;
  color: var(--cyan);
  margin: 6px 0 10px;
  word-break: break-all;
}
.api-card p { margin: 0; font-size: 13px; color: var(--ink-2); }
.method {
  display: inline-block;
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  padding: 3px 8px;
  border-radius: 4px;
  text-transform: uppercase;
}
.method.get { background: rgba(95, 212, 255, 0.12); color: var(--cyan); }
.method.post { background: rgba(74, 143, 209, 0.18); color: #9cc7f0; }
.method.any { background: rgba(122, 141, 168, 0.15); color: var(--ink-2); }

/* ---- Footer ---- */
.api-foot {
  margin-top: clamp(56px, 7vw, 88px);
  padding-top: 24px;
  border-top: 1px solid var(--line);
  display: flex; justify-content: space-between; gap: 20px;
  flex-wrap: wrap;
  font-family: var(--f-mono);
  font-size: 12px;
  color: var(--mute);
  letter-spacing: 0.06em;
}
.api-foot a { color: var(--cyan); }

/* ---- Login ---- */
.auth-wrap {
  position: relative;
  min-height: 100vh;
  display: grid; place-items: center;
  padding: 40px 20px;
}
.auth-card {
  width: 100%;
  max-width: 420px;
  padding: 36px 32px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line-strong);
  background: linear-gradient(180deg, #0e1a2e 0%, #0a1422 100%);
  box-shadow: 0 30px 80px -20px rgba(0,0,0,0.7),
              0 0 60px -10px rgba(74,143,209,0.35),
              inset 0 1px 0 rgba(255,255,255,0.05);
}
.auth-title {
  font-family: var(--f-display);
  font-weight: 600;
  font-size: 28px;
  letter-spacing: -0.025em;
  margin: 0 0 4px;
}
.auth-subtitle { color: var(--mute); margin: 0 0 22px; font-size: 14px; }
.auth-alert {
  padding: 10px 14px;
  border: 1px solid rgba(255,122,122,0.4);
  background: rgba(255,122,122,0.08);
  color: var(--danger);
  border-radius: var(--r-sm);
  font-size: 13px;
  margin-bottom: 16px;
}
.auth-form { display: grid; gap: 14px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field span {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mute);
}
.field input {
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  padding: 11px 13px;
  color: var(--ink);
  font-family: var(--f-body);
  font-size: 15px;
  transition: border-color .15s ease, background .15s ease;
}
.field input:focus {
  outline: none;
  border-color: var(--brand);
  background: rgba(74,143,209,0.06);
}
.auth-submit {
  width: 100%;
  justify-content: center;
  margin-top: 4px;
}

/* ---- Error pages ---- */
.err-code {
  display: block;
  font-family: var(--f-display);
  font-size: clamp(80px, 14vw, 160px);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
  background: linear-gradient(135deg, var(--cyan), var(--brand));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}