:root {
  --bg: #f4f7fb;
  --surface: #ffffff;
  --surface-border: #dde4ef;
  --text: #10213b;
  --muted: #51617c;
  --accent: #0e5ad2;
  --accent-strong: #0a46a7;
  --shadow: 0 10px 32px rgba(16, 33, 59, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--text);
  background: radial-gradient(circle at 5% -15%, #d7e5ff 0%, transparent 38%), var(--bg);
  font-family: "DM Sans", sans-serif;
}

.bg-accent {
  position: fixed;
  inset: auto -12rem -14rem auto;
  width: 32rem;
  height: 32rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(14, 90, 210, 0.24), rgba(14, 90, 210, 0));
  pointer-events: none;
}

.topbar {
  padding: 1.25rem 1.25rem 0;
}

.topbar__inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1.1rem 1.25rem;
  border: 1px solid var(--surface-border);
  border-radius: 16px;
  background: var(--surface);
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.eyebrow {
  margin: 0;
  color: var(--accent);
  font-weight: 700;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

h1 {
  margin: 0.2rem 0 0;
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(1.35rem, 2vw, 1.9rem);
}

.docs-link {
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
  padding: 0.65rem 1rem;
  white-space: nowrap;
}

.page {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1rem 1.25rem 2rem;
  display: grid;
  gap: 1rem;
}

.card {
  border: 1px solid var(--surface-border);
  border-radius: 16px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.intro {
  padding: 1rem;
}

.intro h2 {
  margin: 0 0 0.45rem;
}

.intro p {
  margin: 0;
  color: var(--muted);
  line-height: 1.45;
}

.controls {
  padding: 1rem;
  display: grid;
  gap: 0.85rem;
}

.control-row {
  display: grid;
  grid-template-columns: 120px 1fr auto;
  align-items: center;
  gap: 0.7rem;
}

label {
  font-weight: 700;
  font-size: 0.95rem;
}

select,
input[type="range"],
button {
  font: inherit;
}

select {
  width: 100%;
  border-radius: 10px;
  border: 1px solid #cfd9ea;
  padding: 0.55rem 0.7rem;
}

.slice-label {
  font-weight: 700;
  color: var(--muted);
}

.buttons {
  display: flex;
  gap: 0.6rem;
}

button {
  border: 0;
  background: #e9f0ff;
  color: #19458f;
  padding: 0.55rem 0.85rem;
  border-radius: 10px;
  font-weight: 700;
  cursor: pointer;
}

button:hover {
  background: #dbe8ff;
}

.series-description {
  margin: 0.1rem 0 0;
  color: var(--muted);
}

.viewer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
}

.panel {
  padding: 0.9rem;
  display: grid;
  gap: 0.7rem;
}

h2 {
  margin: 0;
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.05rem;
}

img {
  width: 100%;
  aspect-ratio: 16 / 7;
  object-fit: contain;
  border-radius: 12px;
  border: 1px solid #dce4f2;
  background: #0f1420;
  max-height: 78vh;
}

.caption {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.help {
  padding: 0.9rem 1rem;
}

h3 {
  margin: 0 0 0.35rem;
  font-family: "Space Grotesk", sans-serif;
}

.help p {
  margin: 0;
  color: var(--muted);
}

@media (max-width: 760px) {
  .topbar__inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .control-row {
    grid-template-columns: 1fr;
  }

  img {
    aspect-ratio: 4 / 3;
  }
}