/* ============================================================
   N6521W — Aircraft Status Site
   Design language: aircraft data plate + instrument panel.
   Palette: hangar charcoal, aluminum panel, annunciator lights.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=Work+Sans:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root {
  --bg: #14181c;
  --panel: #1c2126;
  --panel-raised: #232931;
  --hairline: #33393f;
  --hairline-soft: #262c32;
  --paper: #ede8dc;
  --paper-dim: #a8a29a;
  --paper-faint: #6f6b64;
  --green: #6b9c78;
  --green-glow: rgba(107, 156, 120, 0.35);
  --amber: #d98f3b;
  --amber-glow: rgba(217, 143, 59, 0.35);
  --rust: #c1502e;
  --rust-glow: rgba(193, 80, 46, 0.4);

  --display: 'Space Grotesk', sans-serif;
  --body: 'Work Sans', sans-serif;
  --mono: 'IBM Plex Mono', monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  background-image:
    radial-gradient(circle at 15% 0%, rgba(107,156,120,0.05), transparent 45%),
    radial-gradient(circle at 85% 100%, rgba(217,143,59,0.04), transparent 45%);
  color: var(--paper);
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

a { color: inherit; }

/* ---------- Rivet texture ---------- */
.rivet-row {
  display: flex;
  justify-content: space-between;
  padding: 0 18px;
}
.rivet {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #4a5158, #23282e 70%);
  box-shadow: 0 1px 0 rgba(0,0,0,0.5);
}

/* ---------- Top nav ---------- */
.topnav {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(20,24,28,0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--hairline);
}
.topnav-inner {
  max-width: 980px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.topnav-mark {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--paper);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
}
.topnav-mark .dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 6px 1px var(--green-glow);
}
.topnav-links { display: flex; gap: 4px; }
.topnav-links a {
  font-family: var(--body);
  font-size: 13.5px;
  font-weight: 500;
  color: var(--paper-dim);
  text-decoration: none;
  padding: 8px 14px;
  border-radius: 3px;
  transition: color 0.15s, background 0.15s;
}
.topnav-links a:hover { color: var(--paper); background: var(--panel-raised); }
.topnav-links a.active { color: var(--paper); background: var(--panel-raised); }

/* ---------- Page shell ---------- */
main { max-width: 980px; margin: 0 auto; padding: 0 24px 96px; }

/* ---------- Data plate hero ---------- */
.dataplate {
  margin-top: 40px;
  border: 1px solid var(--hairline);
  border-radius: 10px;
  background: linear-gradient(155deg, #22272d 0%, #1a1e23 70%);
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 50px -25px rgba(0,0,0,0.6), inset 0 1px 0 rgba(255,255,255,0.03);
}
.dataplate::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(115deg, rgba(255,255,255,0.012) 0px, rgba(255,255,255,0.012) 1px, transparent 1px, transparent 3px);
  pointer-events: none;
}
.dataplate-rivets-top, .dataplate-rivets-bottom { padding-top: 14px; padding-bottom: 14px; }
.dataplate-rivets-bottom { padding-top: 0; padding-bottom: 14px; }

.dataplate-body {
  padding: 8px 40px 36px;
  text-align: center;
}
.dataplate-eyebrow {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--paper-faint);
  margin-bottom: 18px;
}
.dataplate-reg {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(48px, 10vw, 84px);
  letter-spacing: 0.02em;
  color: var(--paper);
  line-height: 1;
  margin: 0 0 6px;
}
.dataplate-type {
  font-family: var(--body);
  font-size: 17px;
  color: var(--paper-dim);
  margin-bottom: 28px;
}
.dataplate-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid var(--hairline-soft);
  padding-top: 24px;
  max-width: 640px;
  margin: 0 auto;
}
.dataplate-field { padding: 0 12px; }
.dataplate-field + .dataplate-field { border-left: 1px solid var(--hairline-soft); }
.dataplate-label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--paper-faint);
  margin-bottom: 6px;
}
.dataplate-value {
  font-family: var(--mono);
  font-size: 15px;
  color: var(--paper);
  font-weight: 500;
}

@media (max-width: 620px) {
  .dataplate-grid { grid-template-columns: 1fr; gap: 16px; }
  .dataplate-field { border-left: none !important; padding: 0; }
  .dataplate-field + .dataplate-field { border-top: 1px solid var(--hairline-soft); padding-top: 16px; }
}

/* ---------- Status strip ---------- */
.statusline {
  display: flex;
  align-items: center;
  gap: 10px;
  justify-content: center;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--paper-dim);
  margin: 22px 0 8px;
  flex-wrap: wrap;
}
.statusline .sep { color: var(--hairline); }

/* ---------- Section panels ---------- */
.section {
  margin-top: 40px;
}
.section-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}
.lamp {
  width: 10px; height: 10px; border-radius: 50%;
  flex-shrink: 0;
  position: relative;
}
.lamp.green { background: var(--green); box-shadow: 0 0 10px 2px var(--green-glow); }
.lamp.amber { background: var(--amber); box-shadow: 0 0 10px 2px var(--amber-glow); }
.lamp.rust  { background: var(--rust);  box-shadow: 0 0 10px 2px var(--rust-glow); }

.section-title {
  font-family: var(--display);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--paper);
}
.section-sub {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--paper-faint);
  margin-left: auto;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--hairline);
  border-radius: 8px;
  overflow: hidden;
}
.row {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 24px;
  padding: 16px 22px;
  border-bottom: 1px solid var(--hairline-soft);
}
.row:last-child { border-bottom: none; }
.row-label {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  color: var(--paper-faint);
  padding-top: 2px;
}
.row-value {
  font-size: 14.5px;
  color: var(--paper);
  line-height: 1.6;
}
.row-value .num { font-family: var(--mono); color: var(--paper); }

@media (max-width: 620px) {
  .row { grid-template-columns: 1fr; gap: 4px; padding: 14px 18px; }
}

/* ---------- Attention panel (amber/rust variants) ---------- */
.attn-panel { border-color: var(--hairline); }
.attn-item {
  display: flex;
  gap: 14px;
  padding: 16px 22px;
  border-bottom: 1px solid var(--hairline-soft);
  align-items: flex-start;
}
.attn-item:last-child { border-bottom: none; }
.attn-lamp { margin-top: 5px; }
.attn-title {
  font-family: var(--body);
  font-weight: 600;
  font-size: 14.5px;
  color: var(--paper);
  margin-bottom: 3px;
}
.attn-detail {
  font-size: 13.5px;
  color: var(--paper-dim);
  line-height: 1.55;
}

/* ---------- Footer ---------- */
footer {
  max-width: 980px;
  margin: 60px auto 0;
  padding: 24px 24px 40px;
  border-top: 1px solid var(--hairline-soft);
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--paper-faint);
  line-height: 1.7;
}
footer a { color: var(--paper-dim); text-decoration: underline; text-decoration-color: var(--hairline); text-underline-offset: 3px; }

/* ---------- Buttons / links ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--body);
  font-weight: 600;
  font-size: 13.5px;
  color: var(--bg);
  background: var(--green);
  padding: 11px 20px;
  border-radius: 6px;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: filter 0.15s, transform 0.15s;
}
.btn:hover { filter: brightness(1.08); transform: translateY(-1px); }
.btn.secondary {
  background: transparent;
  color: var(--paper);
  border: 1px solid var(--hairline);
}
.btn.secondary:hover { background: var(--panel-raised); }

/* ---------- Access gate ---------- */
html.gate-locked body > *:not(#gate-overlay) { display: none !important; }

#gate-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.gate-panel {
  width: 100%;
  max-width: 380px;
  border: 1px solid var(--hairline);
  border-radius: 10px;
  background: linear-gradient(155deg, #22272d 0%, #1a1e23 70%);
  padding: 8px 32px 32px;
  text-align: center;
  box-shadow: 0 20px 50px -25px rgba(0,0,0,0.6);
}
.gate-rivets {
  display: flex;
  justify-content: space-between;
  padding: 14px 4px 22px;
}
.gate-rivets .rivet {
  width: 5px; height: 5px; border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #4a5158, #23282e 70%);
}
.gate-eyebrow {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--paper-faint);
  margin-bottom: 10px;
}
.gate-title {
  font-family: var(--display);
  font-weight: 700;
  font-size: 34px;
  color: var(--paper);
  margin-bottom: 10px;
}
.gate-sub {
  font-size: 13.5px;
  color: var(--paper-dim);
  margin-bottom: 22px;
  line-height: 1.5;
}
#gate-form { display: flex; flex-direction: column; gap: 12px; }
#gate-input {
  font-family: var(--mono);
  font-size: 14px;
  background: var(--panel);
  border: 1px solid var(--hairline);
  border-radius: 6px;
  padding: 12px 14px;
  color: var(--paper);
  text-align: center;
  letter-spacing: 0.04em;
}
#gate-input:focus {
  outline: none;
  border-color: var(--green);
}
#gate-form .btn { width: 100%; justify-content: center; }
.gate-error {
  margin-top: 12px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--rust);
  min-height: 16px;
}