:root {
  --bg: #f3f6fb;
  --surface: #ffffff;
  --surface-2: #f8fbff;
  --border: #dbe4f0;
  --text: #112033;
  --muted: #5b6b80;
  --accent: #2563eb;
  --accent-soft: #dbeafe;
  --success: #166534;
  --success-soft: #dcfce7;
  --shadow: 0 18px 42px rgba(15, 23, 42, 0.08);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --content-width: 1240px;
  color-scheme: light;
  font-family: Inter, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: linear-gradient(180deg, #eef4ff 0%, var(--bg) 220px);
  color: var(--text);
}

a { color: inherit; text-decoration: none; }

img, audio, iframe { max-width: 100%; }

.shell {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 32px 20px 48px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  margin-bottom: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  font-weight: 700;
}

.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--accent), #38bdf8);
  color: white;
  display: grid;
  place-items: center;
  box-shadow: var(--shadow);
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.nav-link {
  padding: 10px 14px;
  border-radius: 999px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid transparent;
}

.nav-link.active {
  color: var(--accent);
  border-color: rgba(37, 99, 235, 0.18);
  background: white;
}

.hero {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.12), rgba(56, 189, 248, 0.10));
  border: 1px solid rgba(37, 99, 235, 0.14);
  border-radius: var(--radius-xl);
  padding: 28px;
  box-shadow: var(--shadow);
  margin-bottom: 24px;
}

.hero h1 {
  margin: 0 0 12px;
  font-size: clamp(2rem, 4vw, 3rem);
}

.hero p {
  margin: 0;
  max-width: 72ch;
  color: var(--muted);
  line-height: 1.6;
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.badge {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255,255,255,0.78);
  border: 1px solid rgba(37, 99, 235, 0.14);
  color: var(--muted);
  font-size: 0.95rem;
}

.grid {
  display: grid;
  grid-template-columns: minmax(280px, 340px) minmax(0, 1fr);
  gap: 24px;
}

.panel {
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  overflow: hidden;
}

.panel-header {
  padding: 22px 24px 12px;
  border-bottom: 1px solid rgba(219, 228, 240, 0.8);
}

.panel-title {
  margin: 0 0 8px;
  font-size: 1.15rem;
}

.panel-subtitle {
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
}

.panel-body {
  padding: 20px 24px 24px;
}

.collection {
  display: grid;
  gap: 12px;
}

.item-card {
  display: block;
  padding: 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--surface-2);
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.item-card:hover {
  border-color: rgba(37, 99, 235, 0.25);
  transform: translateY(-1px);
}

.item-card.active {
  border-color: rgba(37, 99, 235, 0.35);
  background: white;
  box-shadow: 0 10px 28px rgba(37, 99, 235, 0.08);
}

.item-title {
  font-weight: 700;
  margin: 0 0 6px;
}

.item-meta {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.45;
}

.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.button,
.button:visited {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 12px;
  border: 1px solid transparent;
  background: var(--accent);
  color: white;
  font-weight: 700;
  cursor: pointer;
}

.button.secondary {
  background: white;
  color: var(--accent);
  border-color: rgba(37, 99, 235, 0.2);
}

.htmx-indicator {
  display: none;
  color: var(--muted);
  font-size: 0.95rem;
}

.htmx-request .htmx-indicator,
.htmx-request.htmx-indicator {
  display: inline-flex;
}

.empty-state,
.message-box,
.result-block {
  border-radius: var(--radius-md);
  border: 1px dashed rgba(91, 107, 128, 0.35);
  background: rgba(248, 251, 255, 0.9);
  padding: 18px;
}

.message-box.success,
.result-head {
  border-style: solid;
  border-color: rgba(34, 197, 94, 0.25);
  background: var(--success-soft);
  color: var(--success);
}

.result-head h2,
.result-head h3 {
  margin: 0 0 6px;
}

.kv-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 18px 0;
}

.kv-card {
  padding: 14px 16px;
  border-radius: var(--radius-md);
  background: var(--surface-2);
  border: 1px solid rgba(219, 228, 240, 0.9);
}

.kv-label {
  margin: 0 0 6px;
  color: var(--muted);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.kv-value {
  margin: 0;
  font-weight: 700;
  line-height: 1.4;
}

.field-list {
  display: grid;
  gap: 12px;
  margin: 18px 0;
}

.field-row {
  padding: 14px 16px;
  border-radius: var(--radius-md);
  background: white;
  border: 1px solid rgba(219, 228, 240, 0.9);
}

.field-row strong,
.field-row b {
  display: block;
  margin-bottom: 6px;
}

.metrics {
  display: grid;
  gap: 10px;
  margin: 18px 0;
}

.metric-bar {
  width: 100%;
  height: 12px;
  border-radius: 999px;
  background: #dbe4f0;
  overflow: hidden;
}

.metric-fill {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, #2563eb, #38bdf8);
}

.media-frame {
  width: 100%;
  min-height: 420px;
  border: 1px solid rgba(219, 228, 240, 0.9);
  border-radius: var(--radius-md);
  background: white;
}

.table-wrap {
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
}

.data-table th,
.data-table td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid rgba(219, 228, 240, 0.9);
  vertical-align: top;
}

.data-table th {
  color: var(--muted);
  font-weight: 600;
  width: 38%;
}

.footer-note {
  margin-top: 22px;
  color: var(--muted);
  font-size: 0.92rem;
}

.code-pill {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.1);
  color: var(--accent);
  font-family: ui-monospace, SFMono-Regular, monospace;
  font-size: 0.9rem;
}

.hero-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
  margin-top: 24px;
}

.demo-card {
  display: grid;
  gap: 12px;
  padding: 22px;
  border-radius: var(--radius-lg);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.demo-card h2 {
  margin: 0;
  font-size: 1.25rem;
}

.demo-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.demo-icon {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  font-size: 1.5rem;
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.12), rgba(56, 189, 248, 0.16));
}

.contract-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
}

@media (max-width: 940px) {
  .grid { grid-template-columns: 1fr; }
  .kv-grid { grid-template-columns: 1fr; }
  .topbar { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 640px) {
  .shell { padding-inline: 14px; }
  .hero, .panel-header, .panel-body { padding-inline: 18px; }
}