:root {
  color-scheme: dark;
  --bg: #0b1020;
  --bg-soft: #121a32;
  --card: rgba(17, 24, 43, 0.88);
  --card-strong: rgba(14, 20, 36, 0.98);
  --line: rgba(151, 167, 197, 0.18);
  --text: #f4f7ff;
  --muted: #a8b4d3;
  --accent: #7c9cff;
  --accent-strong: #a9f8d8;
  --warning: #ffc178;
  --danger: #ff8e9f;
  --shadow: 0 28px 60px rgba(3, 7, 18, 0.42);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 12px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background:
    radial-gradient(circle at top left, rgba(124, 156, 255, 0.2), transparent 28%),
    radial-gradient(circle at top right, rgba(169, 248, 216, 0.12), transparent 22%),
    linear-gradient(180deg, #09101e 0%, #0d1426 50%, #0b1020 100%);
  color: var(--text);
  line-height: 1.6;
}

a { color: inherit; }

main { display: block; }

.shell {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
}

.hero,
.section {
  padding: 3.8rem 0;
}

.hero-grid,
.app-layout,
.footer-grid,
.faq-grid,
.panel-grid,
.three-up,
.metric-grid,
.fee-grid {
  display: grid;
  gap: 1.2rem;
}

.hero-grid { grid-template-columns: minmax(0, 1.25fr) minmax(300px, 0.75fr); align-items: start; }
.app-layout { grid-template-columns: minmax(0, 1.15fr) minmax(340px, 0.85fr); align-items: start; }
.three-up { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.faq-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.faq-grid.single-column { grid-template-columns: 1fr; }
.panel-grid { grid-template-columns: 2fr 1fr; }
.metric-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.fee-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.footer-grid { grid-template-columns: minmax(0, 1fr) auto; align-items: end; }

.card,
.subpanel,
.status-card,
.summary-card,
.participant-card,
.item-row,
.metric-card {
  background: var(--card);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.card,
.subpanel,
.summary-card,
.participant-card,
.item-row,
.metric-card {
  border-radius: var(--radius-lg);
}

.hero-card,
.builder-card,
.results-card {
  padding: 1.5rem;
}

.builder-card,
.results-card,
.card {
  backdrop-filter: blur(18px);
}

.results-card {
  position: sticky;
  top: 1rem;
}

.hero h1,
.section h2,
.section h3,
.footer-grid p,
label,
strong,
button,
input,
select,
textarea {
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.4rem, 5vw, 4.6rem);
  line-height: 1.02;
  margin: 0.5rem 0 1rem;
}

h2, h3, h4, p { margin: 0; }

h2 { font-size: clamp(1.45rem, 2vw, 2rem); line-height: 1.15; }
h3 { font-size: 1.05rem; line-height: 1.2; }

.lead,
.small-note,
.tiny-note {
  color: var(--muted);
}

.lead {
  font-size: 1.1rem;
  max-width: 62ch;
  margin-bottom: 1.4rem;
}

.eyebrow,
.mini-label,
.item-label,
.status-pill,
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  border-radius: 999px;
  padding: 0.32rem 0.7rem;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.eyebrow,
.status-pill,
.tag,
.mini-label {
  background: rgba(124, 156, 255, 0.16);
  color: #dce5ff;
  border: 1px solid rgba(124, 156, 255, 0.28);
}

.muted-pill,
.tag.neutral { background: rgba(168, 180, 211, 0.12); border-color: rgba(168, 180, 211, 0.2); color: #d7deef; }
.tag.good { background: rgba(90, 208, 163, 0.15); border-color: rgba(90, 208, 163, 0.28); color: #cffff0; }
.tag.warn { background: rgba(255, 193, 120, 0.16); border-color: rgba(255, 193, 120, 0.26); color: #ffefc8; }

.cta-row,
.toolbar,
.subpanel-head,
.participant-head,
.summary-topline,
.item-topline {
  display: flex;
  gap: 0.8rem;
  align-items: center;
  justify-content: space-between;
}

.cta-row { flex-wrap: wrap; margin-bottom: 1rem; }
.toolbar { justify-content: flex-start; margin: 1.2rem 0 1.4rem; }

.btn,
.mini-link,
.share-chip {
  font: inherit;
  cursor: pointer;
}

.btn {
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0.9rem 1.2rem;
  font-weight: 700;
  text-decoration: none;
  transition: transform 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}

.btn:hover,
.share-chip:hover,
.mini-link:hover { transform: translateY(-1px); }

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #90afff 70%);
  color: #0b1124;
}

.btn-secondary {
  background: rgba(244, 247, 255, 0.06);
  color: var(--text);
  border-color: rgba(244, 247, 255, 0.14);
}

.btn-ghost {
  background: transparent;
  color: var(--muted);
  border-color: rgba(168, 180, 211, 0.16);
}

.btn.small { padding: 0.65rem 0.95rem; }

.form-stack,
.participant-list,
.item-list,
.summary-stack {
  display: grid;
  gap: 1rem;
}

.subpanel,
.status-card,
.compact-panel {
  padding: 1rem;
}

.compact-panel { margin-top: 1rem; }
.warning-panel { border-color: rgba(255, 193, 120, 0.25); }

label {
  display: block;
  margin-bottom: 0.42rem;
  font-size: 0.88rem;
  font-weight: 600;
  color: #d9e1f6;
}

input,
select,
textarea {
  width: 100%;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(151, 167, 197, 0.18);
  background: rgba(6, 11, 24, 0.7);
  color: var(--text);
  padding: 0.82rem 0.95rem;
  outline: none;
}

input:focus,
select:focus,
textarea:focus {
  border-color: rgba(124, 156, 255, 0.62);
  box-shadow: 0 0 0 3px rgba(124, 156, 255, 0.15);
}

textarea { resize: vertical; min-height: 200px; }

.participant-card {
  padding: 1rem;
  display: grid;
  grid-template-columns: 1.4fr 1fr auto;
  gap: 1rem;
  align-items: end;
}

.avatar {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(124, 156, 255, 0.18);
  color: #ebf0ff;
  font-weight: 800;
  margin-right: 0.8rem;
  flex: 0 0 auto;
}

.item-row {
  padding: 1rem;
  display: grid;
  gap: 0.9rem;
}

.item-grid,
.share-grid {
  display: grid;
  gap: 0.8rem;
}

.item-grid { grid-template-columns: 1.6fr 0.8fr; }
.share-grid { grid-template-columns: repeat(auto-fit, minmax(132px, 1fr)); }

.share-chip {
  border-radius: var(--radius-md);
  border: 1px solid rgba(151, 167, 197, 0.18);
  background: rgba(9, 15, 30, 0.9);
  color: var(--text);
  padding: 0.8rem 0.9rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.share-chip strong {
  font-size: 1.05rem;
  color: var(--accent-strong);
}

.share-chip.active {
  border-color: rgba(124, 156, 255, 0.48);
  background: linear-gradient(135deg, rgba(124, 156, 255, 0.16), rgba(169, 248, 216, 0.1));
}

.share-hint { margin-bottom: 0.6rem; color: var(--muted); font-size: 0.86rem; }

.metric-card {
  padding: 0.95rem 1rem;
}

.metric-card span,
.metric-card strong,
.summary-card dt,
.summary-card dd,
.status-card p,
.line-list,
.tiny-note,
.share-hint,
.small-note {
  font-size: 0.92rem;
}

.metric-card span,
.summary-card dt { color: var(--muted); display: block; margin-bottom: 0.3rem; }
.metric-card strong { font-size: 1.3rem; }
.metric-card.accent { background: linear-gradient(135deg, rgba(124, 156, 255, 0.16), rgba(169, 248, 216, 0.12)); }

.status-card {
  margin-top: 1rem;
  border-radius: var(--radius-md);
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr 1fr;
}

.balance-ok { color: #bbffd8; }
.balance-warning { color: #ffd9a3; }

.summary-card { padding: 1rem; }
.summary-card dl { margin: 0.8rem 0 0; display: grid; gap: 0.45rem; }
.summary-card dl div { display: flex; justify-content: space-between; gap: 1rem; }
.summary-card dd { margin: 0; text-align: right; }

.line-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}

.line-list li {
  padding: 0.75rem 0.9rem;
  border-radius: var(--radius-sm);
  background: rgba(8, 13, 26, 0.74);
  border: 1px solid rgba(151, 167, 197, 0.15);
}

.site-footer {
  padding: 0 0 2rem;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 1rem;
  margin-top: 0.7rem;
}

.ordered-list {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--text);
  display: grid;
  gap: 0.55rem;
}

.faq-stack {
  display: grid;
  gap: 1rem;
}

.site-footer a {
  color: #dce5ff;
  text-decoration: none;
}

.site-footer a:hover { text-decoration: underline; }
.footer-entity { text-align: right; color: var(--muted); }
.no-top { margin-top: 0.25rem; }
.mini-link {
  border: 0;
  background: transparent;
  color: var(--muted);
  padding: 0;
}
.mini-link.danger { color: var(--danger); }
.section-heading { margin-bottom: 1.1rem; }
.section-heading.tight { margin-bottom: 0.8rem; }
.tiny-note { color: var(--muted); margin-top: 0.55rem; }
.muted { background: linear-gradient(180deg, rgba(255,255,255,0.01), rgba(255,255,255,0.02)); }

@media (max-width: 980px) {
  .hero-grid,
  .app-layout,
  .three-up,
  .faq-grid,
  .footer-grid,
  .participant-card,
  .panel-grid,
  .fee-grid,
  .status-card,
  .item-grid {
    grid-template-columns: 1fr;
  }

  .results-card { position: static; }
  .footer-entity { text-align: left; }
}

@media (max-width: 640px) {
  .shell { width: min(100% - 1rem, 1180px); }
  .hero, .section { padding: 2.5rem 0; }
  .hero-card, .builder-card, .results-card { padding: 1.1rem; }
  .share-grid, .metric-grid { grid-template-columns: 1fr; }
}