:root {
  --bg: #1a1a1a;
  --panel: #1e1e1e;
  --text: #e0e0e0;
  --muted: #888;
  --green: #16d05c;
  --red: #d65151;
  --blue: #4ea6ff;
  --orange: #f7a350;
  --accent: #2d3a55;
  --accent-hover: #3d4a65;
  --border: #333;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo",
               "Malgun Gothic", sans-serif;
  height: 100%;
}

.root {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 60px 24px 40px 24px;
  gap: 36px;
}

.hero { text-align: center; }
.hero h1 {
  font-size: 38px;
  font-weight: 700;
  margin: 0 0 8px 0;
  letter-spacing: -0.02em;
}
.hero .subtitle {
  color: var(--muted);
  font-size: 14px;
  margin: 0;
  font-family: ui-monospace, "Cascadia Mono", Menlo, monospace;
}
.hero #station-id { color: var(--blue); }

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  width: 100%;
  max-width: 1000px;
}
@media (max-width: 900px) {
  .cards { grid-template-columns: repeat(2, 1fr); max-width: 760px; }
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 28px 26px 22px 26px;
  background: var(--accent);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  text-decoration: none;
  transition: background 0.15s, border-color 0.15s, transform 0.05s;
  min-height: 200px;
}
.card:hover {
  background: var(--accent-hover);
  border-color: var(--blue);
}
.card:active {
  transform: scale(0.99);
}
.card.station::before,
.card.dashboard::before,
.card.models::before,
.card.training::before,
.card.settings::before {
  content: "";
  position: absolute;
  left: 0; top: 14px; bottom: 14px;
  width: 3px;
  border-radius: 0 2px 2px 0;
}
.card.station::before { background: var(--green); }
.card.dashboard::before { background: var(--blue); }
.card.models::before { background: var(--orange); }
.card.training::before { background: var(--red); }
.card.settings::before { background: var(--muted); }

.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.card-tag {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 3px 8px;
  border: 1px solid var(--border);
  border-radius: 4px;
}
.card-id {
  color: var(--blue);
  font-size: 12px;
  font-family: ui-monospace, "Cascadia Mono", Menlo, monospace;
}
.card-title {
  font-size: 28px;
  font-weight: 700;
  margin-top: 6px;
}
.card-sub {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.45;
  flex: 1;
}
.card-meta {
  font-size: 12px;
  color: var(--muted);
  font-family: ui-monospace, "Cascadia Mono", Menlo, monospace;
  margin-top: 4px;
}

.footer {
  font-size: 11px;
  color: var(--muted);
  font-family: ui-monospace, "Cascadia Mono", Menlo, monospace;
}
.footer a {
  color: var(--blue);
  text-decoration: none;
  margin: 0 4px;
}
.footer a:hover { text-decoration: underline; }

@media (max-width: 600px) {
  .cards { grid-template-columns: 1fr; }
  .hero h1 { font-size: 28px; }
}