/* =====================================================================
   Radeus Labs — dl.radeuslabs.com shared THEME
   ---------------------------------------------------------------------
   Distilled from the existing tools (beamwidth, acu-log-viewer,
   sky-chart, tle-generate, tools homepage), which already share one
   cohesive design system. Link this on any page to adopt the look:

     <link rel="stylesheet"
       href="https://fonts.googleapis.com/css2?family=Montserrat:wght@300;400;600;700;800&family=Outfit:wght@300;400;500;600&display=swap">
     <link rel="stylesheet" href="/common/theme.css">

   Then use the structural classes documented in STYLE-GUIDE.md:
   .site-header / .hero / .section-divider / .page-main / .panel /
   .btn / .field / .site-footer-*
   ===================================================================== */

/* NOTE: load the fonts with the <link> shown above (faster, non-blocking).
   The font stacks fall back to Helvetica/Arial if the webfonts don't load. */

:root {
  --navy:      #00205B;
  --navy-deep: #001130;
  --blue:      #2C51C0;
  --red:       #BF0D23;
  --light-bg:  #F1F6FF;
  --white:     #FFFFFF;
  --text:      #2b2d2f;
  --muted:     #5a6478;
  --border:    #dde1eb;
  --green:     #0e9f6e;   /* semantic: success/keep */
  --warn:      #c97c12;   /* semantic: warning      */

  --shadow-sm: 0 2px 10px rgba(0,32,91,0.09);
  --shadow-md: 0 6px 28px rgba(0,32,91,0.16);
  --shadow-header: 0 2px 8px rgba(0,32,91,0.12);

  --radius: 4px;
  --content: 1060px;      /* marketing/page width; data apps use wider */
  --pad-x: 48px;

  --font-head: 'Montserrat', Helvetica, Arial, Lucida, sans-serif;
  --font-body: 'Outfit', Helvetica, Arial, sans-serif;
  --font-mono: 'Consolas', 'Menlo', ui-monospace, monospace;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--font-body);
  font-weight: 400;
  background: var(--white);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.6;
}

/* ── Header ─────────────────────────────────────────────────────────── */
.site-header {
  background: var(--white);
  height: 80px;
  padding: 0 var(--pad-x);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-header);
  border-bottom: 3px solid var(--navy);
}
.site-header .logo { display: flex; align-items: center; text-decoration: none; flex-shrink: 0; }
.site-header .logo img { height: 54px; width: auto; display: block; }

.site-nav { display: flex; align-items: center; gap: 28px; flex-wrap: wrap; }
.site-nav a {
  font-family: var(--font-head);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--navy);
  text-decoration: none;
  transition: color 0.18s;
}
.site-nav a:hover { color: var(--red); }

/* ── Hero ───────────────────────────────────────────────────────────── */
.hero {
  background: linear-gradient(160deg, var(--navy-deep) 0%, var(--navy) 60%, #0a2d78 100%);
  color: var(--white);
  padding: 56px var(--pad-x) 48px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(44,81,192,0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(44,81,192,0.12) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}
.hero-inner { position: relative; max-width: var(--content); margin: 0 auto; }
.hero-eyebrow {
  font-family: var(--font-head);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--red);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.hero-eyebrow::after { content: ''; display: block; width: 40px; height: 2px; background: var(--red); }
.hero h1 {
  font-family: var(--font-head);
  font-size: clamp(26px, 3.5vw, 40px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  margin-bottom: 14px;
  max-width: 640px;
}
.hero p {
  font-size: 16px;
  font-weight: 300;
  color: rgba(255,255,255,0.75);
  max-width: 720px;
  line-height: 1.7;
}

.section-divider { height: 5px; background: var(--blue); }

/* ── Main ───────────────────────────────────────────────────────────── */
.page-main {
  flex: 1;
  background: var(--light-bg);
  padding: 56px var(--pad-x) 72px;
}
.main-inner { max-width: var(--content); margin: 0 auto; }

.back-link {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-head);
  font-size: 11px; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--navy); text-decoration: none; margin-bottom: 28px; transition: color 0.18s;
}
.back-link:hover { color: var(--red); }
.back-link svg { width: 13px; height: 13px; }

/* ── Panels / Cards ─────────────────────────────────────────────────── */
.panel {
  background: var(--white);
  border: 1px solid var(--border);
  border-top: 5px solid var(--navy);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 32px 30px;
}
.panel--blue { border-top-color: var(--blue); }
.panel--red  { border-top-color: var(--red); }

/* .card = a .panel that lifts on hover (use for clickable tiles) */
.card { transition: transform 0.2s, box-shadow 0.2s, border-top-color 0.2s; }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-top-color: var(--red); }

.panel-eyebrow {
  font-family: var(--font-head);
  font-size: 10px; font-weight: 700; letter-spacing: 0.15em; text-transform: uppercase;
  color: var(--red); margin-bottom: 8px;
}
.panel-title {
  font-family: var(--font-head);
  font-size: 18px; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase;
  color: var(--navy); margin-bottom: 22px;
}

/* ── Buttons ────────────────────────────────────────────────────────── */
.btn {
  font-family: var(--font-head);
  font-size: 11px; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--navy); background: var(--white);
  border: 2px solid var(--border); border-radius: var(--radius);
  padding: 11px 22px; cursor: pointer; text-decoration: none;
  display: inline-flex; align-items: center; gap: 8px;
  transition: background 0.18s, border-color 0.18s, color 0.18s;
}
.btn:hover { background: var(--light-bg); border-color: var(--navy); }
.btn--primary { background: var(--navy); border-color: var(--navy); color: var(--white); }
.btn--primary:hover { background: var(--red); border-color: var(--red); color: var(--white); }
.btn--sm { padding: 6px 12px; font-size: 10px; letter-spacing: 0.08em; }
.btn:disabled, .btn[disabled] { opacity: 0.45; cursor: not-allowed; }

/* ── Form fields ────────────────────────────────────────────────────── */
.field { margin-bottom: 18px; }
.field label {
  display: block; font-family: var(--font-head);
  font-size: 11px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--navy); margin-bottom: 6px;
}
.field .hint { font-size: 12px; font-weight: 300; color: var(--muted); margin-top: 4px; }
.field input, .field select, .field textarea {
  width: 100%;
  font-family: var(--font-body); font-size: 15px; color: var(--text);
  background: var(--white); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 10px 12px; outline: none;
  transition: border-color 0.18s, box-shadow 0.18s;
}
.field input:focus, .field select:focus, .field textarea:focus {
  border-color: var(--blue); box-shadow: 0 0 0 3px rgba(44,81,192,0.15);
}

/* ── Footer ─────────────────────────────────────────────────────────── */
.site-footer-top { background: var(--navy); padding: 40px var(--pad-x); }
.site-footer-top-inner {
  max-width: var(--content); margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap;
}
.footer-brand {
  font-family: var(--font-head); font-size: 16px; font-weight: 800;
  text-transform: uppercase; letter-spacing: 0.06em; color: var(--white);
}
.footer-brand span {
  display: block; font-size: 11px; font-weight: 400; letter-spacing: 0.1em;
  color: rgba(255,255,255,0.50); margin-top: 3px;
}
.footer-contact {
  font-family: var(--font-body); font-size: 13px; font-weight: 300;
  color: rgba(255,255,255,0.55); line-height: 1.8; text-align: right;
}
.footer-contact a { color: rgba(255,255,255,0.55); text-decoration: none; }
.footer-contact a:hover { color: var(--white); }
.site-footer-bottom {
  background: var(--navy-deep); padding: 14px var(--pad-x); text-align: center;
  font-family: var(--font-head); font-size: 11px; font-weight: 400; letter-spacing: 0.06em;
  color: rgba(255,255,255,0.35);
}
.site-footer-bottom a { color: rgba(255,255,255,0.45); text-decoration: none; }
.site-footer-bottom a:hover { color: rgba(255,255,255,0.80); }

/* ── Responsive ─────────────────────────────────────────────────────── */
@media (max-width: 820px) {
  :root { --pad-x: 24px; }
  .hero { padding-top: 44px; padding-bottom: 40px; }
  .site-footer-top-inner { flex-direction: column; align-items: flex-start; }
  .footer-contact { text-align: left; }
}