* { box-sizing: border-box; }
html { font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif; }
body { margin: 0; min-width: 320px; background: var(--bg); color: var(--text); }
a { color: inherit; }
.topbar {
  align-items: center;
  background: var(--nav);
  color: var(--nav-text);
  display: flex;
  gap: 18px;
  justify-content: space-between;
  min-height: 68px;
  padding: 0 max(18px, calc((100vw - 1180px) / 2));
  position: sticky;
  top: 0;
  z-index: 10;
}
.brand { align-items: center; display: inline-flex; font-weight: 900; min-height: 44px; text-decoration: none; white-space: nowrap; }
.brand::before {
  align-items: center;
  background: var(--accent);
  border-radius: var(--mark-radius);
  color: var(--mark-text);
  content: var(--mark);
  display: inline-flex;
  font-size: 12px;
  font-weight: 900;
  height: 34px;
  justify-content: center;
  margin-right: 10px;
  width: 34px;
}
nav { display: flex; flex-wrap: wrap; gap: 8px; justify-content: flex-end; }
nav a {
  border: 1px solid var(--nav-line);
  border-radius: var(--pill-radius);
  color: var(--nav-text);
  font-size: 13px;
  font-weight: 800;
  min-height: 34px;
  padding: 9px 12px;
  text-decoration: none;
}
nav a[aria-current="page"], nav a:hover { background: var(--nav-hover); }
main { margin: 0 auto; max-width: 1180px; padding: 24px 18px 70px; }
.hero {
  background: var(--hero);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--hero-text);
  display: grid;
  gap: 24px;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, .65fr);
  margin-bottom: 18px;
  overflow: hidden;
  padding: clamp(26px, 5vw, 56px);
}
.hero-copy { max-width: 760px; }
.eyebrow { color: var(--accent); font-size: 12px; font-weight: 900; letter-spacing: 0; margin: 0 0 12px; text-transform: uppercase; }
h1 { font-size: clamp(34px, 5vw, 64px); letter-spacing: 0; line-height: .98; margin: 0; max-width: 880px; }
h2 { font-size: clamp(22px, 2.4vw, 32px); letter-spacing: 0; line-height: 1.12; margin: 0; }
p { color: var(--muted); font-size: 17px; line-height: 1.65; margin: 12px 0 0; }
.hero p { color: var(--hero-muted); font-size: clamp(17px, 2vw, 21px); max-width: 720px; }
.primary-action {
  align-items: center;
  background: var(--accent);
  border: 1px solid var(--accent-strong);
  border-radius: var(--button-radius);
  color: var(--button-text);
  display: inline-flex;
  font-size: 15px;
  font-weight: 900;
  justify-content: center;
  margin-top: 22px;
  min-height: 48px;
  padding: 0 18px;
  text-decoration: none;
}
.visual-panel {
  align-self: stretch;
  background: var(--panel-visual);
  border: 1px solid var(--visual-line);
  border-radius: var(--radius);
  display: grid;
  gap: 12px;
  min-height: 280px;
  padding: 18px;
}
.score-row {
  align-items: center;
  background: var(--score-bg);
  border: 1px solid var(--score-line);
  border-radius: var(--card-radius);
  display: flex;
  justify-content: space-between;
  min-height: 54px;
  padding: 12px 14px;
}
.score-row span { color: var(--score-muted); font-size: 13px; font-weight: 800; }
.score-value { color: var(--score-text); font-size: 18px; font-weight: 900; }
.signal-bars { align-items: end; display: grid; gap: 8px; grid-template-columns: repeat(4, 1fr); min-height: 86px; }
.signal-bars i { background: var(--bar); border-radius: 6px 6px 0 0; display: block; }
.signal-bars i:nth-child(1) { height: 42%; }
.signal-bars i:nth-child(2) { height: 68%; }
.signal-bars i:nth-child(3) { height: 54%; }
.signal-bars i:nth-child(4) { height: 84%; }
.route-strip { display: grid; gap: 12px; grid-template-columns: repeat(4, minmax(0, 1fr)); margin-bottom: 18px; }
.route-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--card-radius);
  min-height: 132px;
  padding: 18px;
  text-decoration: none;
}
.route-card:hover { border-color: var(--accent); }
.route-card span { color: var(--accent); display: block; font-size: 12px; font-weight: 900; text-transform: uppercase; }
.route-title { color: var(--text); display: block; font-size: 19px; font-weight: 900; line-height: 1.2; margin-top: 10px; text-transform: none; }
.content-grid { display: grid; gap: 18px; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.content-section, .notice {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--card-radius);
  padding: clamp(22px, 3vw, 32px);
}
.section-kicker { color: var(--accent); font-size: 13px; font-weight: 900; margin: 0 0 10px; }
.notice { margin-top: 18px; }
footer { color: var(--muted); font-size: 14px; padding: 24px 18px 42px; text-align: center; }
a:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }

.theme-ledger {
  --bg: #0b0e14; --text: #eef6f2; --muted: #a5b2aa; --nav: #080b10; --nav-text: #f6fbf5; --nav-line: rgba(198,255,58,.22); --nav-hover: rgba(198,255,58,.12);
  --hero: linear-gradient(135deg, #111827, #0b0e14 62%, #10232a); --hero-text: #ffffff; --hero-muted: #d8e6df; --card: #121821; --line: rgba(198,255,58,.18);
  --accent: #c6ff3a; --accent-strong: #e5ff92; --button-text: #0b0e14; --mark: "DL"; --mark-text: #0b0e14; --radius: 8px; --card-radius: 8px; --button-radius: 8px; --pill-radius: 8px; --mark-radius: 8px;
  --panel-visual: rgba(198,255,58,.06); --visual-line: rgba(198,255,58,.25); --score-bg: rgba(255,255,255,.06); --score-line: rgba(255,255,255,.12); --score-muted: #bad1c3; --score-text: #ffffff; --bar: linear-gradient(#c6ff3a, #2dd4bf);
}
.theme-arctic {
  --bg: #f7f9fb; --text: #172333; --muted: #5d6d7f; --nav: rgba(255,255,255,.96); --nav-text: #172333; --nav-line: #d9e3ed; --nav-hover: #edf5fb;
  --hero: linear-gradient(135deg, #ffffff, #eaf3fa); --hero-text: #172333; --hero-muted: #4f6478; --card: #ffffff; --line: #d9e3ed;
  --accent: #3e7cb1; --accent-strong: #2d6492; --button-text: #ffffff; --mark: "IB"; --mark-text: #ffffff; --radius: 8px; --card-radius: 8px; --button-radius: 8px; --pill-radius: 999px; --mark-radius: 999px;
  --panel-visual: #fafdff; --visual-line: #d9e3ed; --score-bg: #ffffff; --score-line: #d9e3ed; --score-muted: #617283; --score-text: #17324b; --bar: linear-gradient(#8fc6ee, #3e7cb1);
}
.theme-geometric {
  --bg: #101a33; --text: #ffffff; --muted: #b7c1d6; --nav: #0b1326; --nav-text: #ffffff; --nav-line: rgba(255,255,255,.18); --nav-hover: rgba(255,107,44,.18);
  --hero: linear-gradient(135deg, #15254a 0 56%, #ff6b2c 56% 100%); --hero-text: #ffffff; --hero-muted: #e8edf8; --card: #16254a; --line: rgba(255,255,255,.16);
  --accent: #ff6b2c; --accent-strong: #ff8a57; --button-text: #ffffff; --mark: "11"; --mark-text: #ffffff; --radius: 0; --card-radius: 0; --button-radius: 0; --pill-radius: 0; --mark-radius: 0;
  --panel-visual: rgba(255,255,255,.08); --visual-line: rgba(255,255,255,.18); --score-bg: rgba(11,19,38,.6); --score-line: rgba(255,255,255,.16); --score-muted: #dce4f5; --score-text: #ffffff; --bar: linear-gradient(#ff6b2c, #ffd166);
}

@media (max-width: 980px) {
  .topbar { align-items: flex-start; flex-direction: column; padding: 14px 18px; position: static; }
  nav { justify-content: flex-start; }
  .hero { grid-template-columns: 1fr; }
  .visual-panel { min-height: 220px; }
  .route-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 680px) {
  main { padding: 16px 12px 48px; }
  h1 { font-size: clamp(31px, 10vw, 40px); max-width: 12ch; }
  nav a { font-size: 12px; min-height: 30px; padding: 8px 10px; }
  .hero { padding: 22px; }
  .primary-action { width: 100%; }
  .route-strip, .content-grid { grid-template-columns: 1fr; }
  .route-card { min-height: 0; }
}