:root {
  color-scheme: dark;
  --bg: #07131f;
  --panel: #0f2538;
  --panel-2: #122c41;
  --text: #e7f2ff;
  --muted: #8da3b8;
  --accent: #58c7ff;
  --accent-strong: #2aa4ed;
  --border: rgba(255, 255, 255, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, "Segoe UI", Roboto, Arial, sans-serif;
  background: linear-gradient(135deg, var(--bg), #132a3d 60%, #0b1827);
  color: var(--text);
}

.page-shell {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 20px 48px;
}

.hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 24px;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: rgba(15, 37, 56, 0.85);
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.25);
}

.eyebrow {
  margin: 0 0 6px;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.24em;
  color: var(--accent);
}

h1 {
  margin: 0 0 8px;
  font-size: clamp(1.9rem, 3vw, 2.6rem);
}

.subtitle {
  margin: 0;
  max-width: 680px;
  color: var(--muted);
  line-height: 1.6;
}

.hero-image {
  width: min(280px, 100%);
  border-radius: 16px;
  border: 1px solid var(--border);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3);
}

.plot-window {
  border: 1px solid var(--border);
  border-radius: 20px;
  overflow: hidden;
  background: rgba(15, 37, 56, 0.95);
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.25);
}

.tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 16px;
  background: var(--panel-2);
  border-bottom: 1px solid var(--border);
}

.tab-button {
  border: 1px solid transparent;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  padding: 10px 16px;
  cursor: pointer;
  font-size: 0.95rem;
  transition: all 180ms ease;
}

.tab-button:hover,
.tab-button:focus-visible {
  border-color: rgba(88, 199, 255, 0.4);
  outline: none;
}

.tab-button.active {
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #042038;
  font-weight: 700;
}

.panel {
  display: none;
  padding: 18px;
}

.panel.active {
  display: block;
}

.chart-card {
  padding: 16px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid var(--border);
}

.chart-label {
  margin: 0 0 8px;
  font-size: 1rem;
  font-weight: 600;
}

.chart-subtitle {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 0.95rem;
}

.chart-svg {
  width: 100%;
  height: auto;
  display: block;
}

@media (max-width: 720px) {
  .hero {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero-image {
    width: 100%;
    max-width: 360px;
  }
}