/**
 * Shared theme for the SDR / LoRa / iPhone-hydrophone / Salish-SIGINT
 * pages. Cyberpunk factory palette — cyan, magenta, yellow on near-black.
 */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;700&family=Orbitron:wght@500;700;900&family=Share+Tech+Mono&display=swap');

:root {
  --sdr-cyan: #25E1ED;
  --sdr-cyan-rgb: 37, 225, 237;
  --sdr-magenta: #ED1E79;
  --sdr-magenta-rgb: 237, 30, 121;
  --sdr-yellow: #FFEB0B;
  --sdr-yellow-rgb: 255, 235, 11;
  --sdr-orange: #FF6B35;
  --sdr-green: #66ffaa;

  --sdr-bg-1: #02060d;
  --sdr-bg-2: #050d1c;
  --sdr-bg-3: #0a1530;
  --sdr-text: #e6f1ff;
  --sdr-text-dim: rgba(230, 241, 255, 0.62);
  --sdr-text-faint: rgba(230, 241, 255, 0.38);

  --sdr-card: rgba(8, 16, 36, 0.74);
  --sdr-card-strong: rgba(12, 22, 48, 0.92);
  --sdr-border: rgba(var(--sdr-cyan-rgb), 0.18);
  --sdr-border-strong: rgba(var(--sdr-cyan-rgb), 0.45);
  --sdr-divider: rgba(255, 255, 255, 0.06);
}

* { box-sizing: border-box; }

body.sdr-page {
  margin: 0;
  background:
    radial-gradient(circle at 15% -8%, rgba(var(--sdr-cyan-rgb), 0.10), transparent 50%),
    radial-gradient(circle at 92% 6%, rgba(var(--sdr-magenta-rgb), 0.08), transparent 55%),
    linear-gradient(170deg, var(--sdr-bg-1) 0%, var(--sdr-bg-2) 50%, var(--sdr-bg-3) 100%);
  color: var(--sdr-text);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.55;
}

.sdr-page main { max-width: 1180px; margin: 0 auto; padding: 0 1.4rem 5rem; }

::selection { background: rgba(var(--sdr-cyan-rgb), 0.35); color: #fff; }

a { color: var(--sdr-cyan); text-decoration: none; border-bottom: 1px dotted rgba(var(--sdr-cyan-rgb), 0.45); }
a:hover { color: #fff; border-bottom-color: var(--sdr-cyan); }

/* Top nav strip */
.sdr-nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; flex-wrap: wrap; gap: 0.6rem;
  align-items: center; justify-content: space-between;
  padding: 0.7rem 1.25rem;
  background: rgba(2, 6, 13, 0.85);
  backdrop-filter: blur(12px) saturate(140%);
  -webkit-backdrop-filter: blur(12px) saturate(140%);
  border-bottom: 1px solid var(--sdr-border);
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.sdr-nav .brand {
  color: var(--sdr-yellow);
  border-bottom: none;
  font-weight: 700;
  letter-spacing: 0.32em;
}
.sdr-nav nav { display: flex; gap: 1rem; flex-wrap: wrap; }
.sdr-nav nav a { color: var(--sdr-text-dim); border-bottom: none; }
.sdr-nav nav a:hover, .sdr-nav nav a.is-active { color: var(--sdr-cyan); }

/* Hero */
.sdr-hero {
  position: relative; padding: 5.5rem 1.5rem 3.5rem;
  text-align: left; max-width: 1180px; margin: 0 auto;
}
.sdr-eyebrow {
  display: inline-block;
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.74rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--sdr-cyan);
  background: rgba(var(--sdr-cyan-rgb), 0.08);
  border: 1px solid rgba(var(--sdr-cyan-rgb), 0.32);
  border-radius: 999px;
  padding: 0.4rem 0.95rem;
  margin-bottom: 1.6rem;
}
.sdr-hero h1 {
  font-family: 'Orbitron', sans-serif;
  font-weight: 900;
  font-size: clamp(2.1rem, 5.6vw, 3.9rem);
  letter-spacing: -0.015em;
  line-height: 1.06;
  margin: 0 0 1.2rem;
  background: linear-gradient(115deg, #fff 25%, var(--sdr-cyan) 60%, var(--sdr-magenta) 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  text-shadow: 0 0 38px rgba(var(--sdr-cyan-rgb), 0.18);
}
.sdr-hero h1 em {
  font-style: normal;
  font-family: 'JetBrains Mono', monospace;
  background: linear-gradient(120deg, var(--sdr-yellow), var(--sdr-orange));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  font-size: 0.95em;
}
.sdr-hero p.lede {
  font-size: 1.12rem;
  line-height: 1.6;
  color: var(--sdr-text-dim);
  max-width: 780px;
}

/* Sections */
.sdr-page h2 {
  font-family: 'Orbitron', sans-serif;
  font-weight: 700;
  font-size: 1.35rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--sdr-cyan);
  margin: 3.5rem 0 1.2rem;
  border-left: 3px solid var(--sdr-magenta);
  padding-left: 0.85rem;
}
.sdr-page h3 {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 600;
  font-size: 1.02rem;
  color: var(--sdr-yellow);
  margin: 2rem 0 0.6rem;
  letter-spacing: 0.04em;
}
.sdr-page p { color: var(--sdr-text-dim); margin: 0.6rem 0 1rem; }
.sdr-page ul, .sdr-page ol { color: var(--sdr-text-dim); padding-left: 1.4rem; }
.sdr-page li { margin: 0.3rem 0; }
.sdr-page strong { color: var(--sdr-text); font-weight: 600; }
.sdr-page em.spec { font-style: normal; color: var(--sdr-cyan); font-family: 'JetBrains Mono', monospace; }

/* Card */
.sdr-card {
  background: var(--sdr-card);
  border: 1px solid var(--sdr-border);
  border-radius: 14px;
  padding: 1.4rem 1.6rem;
  margin: 1rem 0;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.sdr-card.warn  { border-color: rgba(var(--sdr-magenta-rgb), 0.5); background: rgba(var(--sdr-magenta-rgb), 0.06); }
.sdr-card.note  { border-color: rgba(var(--sdr-yellow-rgb), 0.4); background: rgba(var(--sdr-yellow-rgb), 0.05); }

/* Grid layouts */
.sdr-grid { display: grid; gap: 1rem; }
.sdr-grid-2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.sdr-grid-3 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

/* Spec list (key/value) */
.sdr-spec {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.86rem;
  display: grid;
  grid-template-columns: 12rem 1fr;
  gap: 0.45rem 1.2rem;
  color: var(--sdr-text);
}
.sdr-spec dt { color: var(--sdr-text-faint); text-transform: uppercase; letter-spacing: 0.08em; font-size: 0.74rem; align-self: center; }
.sdr-spec dd { margin: 0; color: var(--sdr-text); }
.sdr-spec dd em { font-style: normal; color: var(--sdr-cyan); }

/* Tables */
.sdr-table {
  width: 100%;
  border-collapse: collapse;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.82rem;
  margin: 1rem 0;
  background: var(--sdr-card);
  border: 1px solid var(--sdr-border);
  border-radius: 10px;
  overflow: hidden;
}
.sdr-table th, .sdr-table td {
  padding: 0.55rem 0.85rem;
  text-align: left;
  border-bottom: 1px solid var(--sdr-divider);
}
.sdr-table th {
  background: rgba(var(--sdr-cyan-rgb), 0.08);
  color: var(--sdr-cyan);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.72rem;
}
.sdr-table tr:last-child td { border-bottom: none; }
.sdr-table tr:hover { background: rgba(var(--sdr-cyan-rgb), 0.04); }

/* Code */
pre.sdr-code, code.sdr-inline {
  font-family: 'JetBrains Mono', monospace;
}
pre.sdr-code {
  background: rgba(0, 0, 0, 0.55);
  border: 1px solid var(--sdr-border);
  border-left: 3px solid var(--sdr-cyan);
  border-radius: 8px;
  padding: 1rem 1.1rem;
  font-size: 0.8rem;
  line-height: 1.55;
  overflow-x: auto;
  color: var(--sdr-text);
  margin: 1rem 0;
}
pre.sdr-code .c { color: var(--sdr-text-faint); }   /* comment */
pre.sdr-code .k { color: var(--sdr-magenta); }      /* keyword */
pre.sdr-code .s { color: var(--sdr-yellow); }       /* string */
pre.sdr-code .n { color: var(--sdr-cyan); }         /* identifier */
code.sdr-inline {
  background: rgba(var(--sdr-cyan-rgb), 0.08);
  border: 1px solid rgba(var(--sdr-cyan-rgb), 0.22);
  border-radius: 4px;
  padding: 0.08rem 0.35rem;
  color: var(--sdr-cyan);
  font-size: 0.86em;
}

/* ASCII diagrams */
pre.sdr-ascii {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  line-height: 1.35;
  color: var(--sdr-cyan);
  background: rgba(0, 0, 0, 0.55);
  border: 1px solid var(--sdr-border);
  border-radius: 8px;
  padding: 1rem 1.2rem;
  overflow-x: auto;
  margin: 1rem 0;
  white-space: pre;
}

/* Pull quote / callout banner */
.sdr-banner {
  display: flex; gap: 1rem; align-items: flex-start;
  padding: 1.1rem 1.4rem;
  border-radius: 12px;
  background: linear-gradient(120deg, rgba(var(--sdr-cyan-rgb), 0.08), rgba(var(--sdr-magenta-rgb), 0.06));
  border: 1px solid var(--sdr-border-strong);
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.92rem;
  color: var(--sdr-text);
}
.sdr-banner .tag {
  font-weight: 700;
  color: var(--sdr-yellow);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  flex-shrink: 0;
}

/* Site-link cluster (sibling pages) */
.sdr-siblings {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 0.8rem;
  margin: 3rem 0 1rem;
}
.sdr-sibling {
  display: block;
  padding: 1rem 1.1rem;
  background: var(--sdr-card);
  border: 1px solid var(--sdr-border);
  border-radius: 10px;
  border-bottom: 1px solid var(--sdr-border);
  transition: transform 0.18s ease, border-color 0.18s ease;
}
.sdr-sibling:hover { transform: translateY(-2px); border-color: var(--sdr-cyan); }
.sdr-sibling .label {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  color: var(--sdr-cyan);
  text-transform: uppercase;
}
.sdr-sibling .title {
  display: block; margin-top: 0.4rem;
  font-family: 'Orbitron', sans-serif;
  font-weight: 700;
  font-size: 1rem;
  color: var(--sdr-text);
}

/* Footer */
.sdr-foot {
  margin: 4rem 0 1rem;
  padding-top: 1.6rem;
  border-top: 1px solid var(--sdr-border);
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.78rem;
  color: var(--sdr-text-faint);
  display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between;
}

@media (max-width: 640px) {
  .sdr-spec { grid-template-columns: 1fr; gap: 0.1rem 0; }
  .sdr-spec dt { margin-top: 0.6rem; }
  .sdr-hero { padding: 3rem 1rem 2rem; }
}