:root {
  color-scheme: dark;
  --bg: #060b18;
  --panel: #111933;
  --line: #334e84;
  --text: #edf3ff;
  --muted: #9db4dc;
  --cyan: #64ebff;
  --pink: #ff94d7;
  --amber: #ffd78d;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 12% -8%, rgba(100, 235, 255, 0.2), transparent 38%),
    radial-gradient(circle at 88% -10%, rgba(255, 148, 215, 0.18), transparent 36%),
    linear-gradient(180deg, #101633 0%, var(--bg) 100%);
}

.deck {
  width: min(980px, 94vw);
  margin: 1.6rem auto 2.2rem;
  display: grid;
  gap: 0.9rem;
}

.panel {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0));
  padding: 1rem 1.1rem;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.kicker {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.72rem;
  color: var(--cyan);
}

h1 {
  margin: 0.25rem 0 0;
  font-size: clamp(1.55rem, 4vw, 2.3rem);
}

h2 {
  margin: 0;
  font-size: 1.02rem;
}

.subtitle {
  margin: 0.45rem 0 0;
  color: var(--muted);
  max-width: 68ch;
}

.settings {
  display: grid;
  gap: 0.75rem;
}

.people-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.55rem;
}

.name-card {
  display: grid;
  gap: 0.28rem;
  border: 1px solid #314971;
  border-radius: 10px;
  background: rgba(10, 18, 37, 0.5);
  padding: 0.55rem;
}

.name-card span {
  color: var(--muted);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

input[type="text"] {
  border: 1px solid #3f5f93;
  border-radius: 8px;
  background: #101c36;
  color: var(--text);
  font: inherit;
  padding: 0.42rem 0.5rem;
}

.sliders {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.65rem;
}

label {
  display: grid;
  gap: 0.3rem;
  color: var(--muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--cyan);
}

.buttons {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

button {
  border: 1px solid #3f5d92;
  border-radius: 10px;
  background: #15233d;
  color: var(--text);
  font: inherit;
  padding: 0.52rem 0.85rem;
  cursor: pointer;
}

button:hover {
  filter: brightness(1.08);
}

button.primary {
  border-color: #06acbe;
  background: linear-gradient(180deg, #63f0ff, #0f95aa);
  color: #06202d;
  font-weight: 700;
}

.item-list {
  margin-top: 0.65rem;
  display: grid;
  gap: 0.45rem;
}

.item-row {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 0.55rem;
  align-items: center;
  border: 1px solid #2f476f;
  border-radius: 10px;
  background: rgba(9, 16, 33, 0.6);
  padding: 0.5rem 0.58rem;
}

.item-name {
  font-weight: 700;
}

.item-price {
  color: var(--amber);
  font-variant-numeric: tabular-nums;
}

.assign-btn {
  min-width: 124px;
  text-align: center;
  padding: 0.42rem 0.5rem;
}

.assign-btn.unassigned {
  color: #8aa7d4;
}

.assign-btn.p0 { border-color: #46c7ff; color: #a7ebff; }
.assign-btn.p1 { border-color: #7cffb7; color: #beffd8; }
.assign-btn.p2 { border-color: #ffbb6f; color: #ffd9a9; }
.assign-btn.p3 { border-color: #ff8fdc; color: #ffc7ec; }

.hint {
  margin: 0.6rem 0 0;
  color: var(--muted);
  font-size: 0.86rem;
}

.totals-grid {
  margin-top: 0.62rem;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.5rem;
}

.total-card {
  border: 1px solid #334f81;
  border-radius: 10px;
  padding: 0.56rem;
  background: rgba(7, 13, 28, 0.62);
  display: grid;
  gap: 0.2rem;
}

.total-card .name {
  color: var(--muted);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.total-card .value {
  font-size: 1.12rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.summary {
  margin-top: 0.62rem;
  color: #b8ceee;
}

.receipt pre,
pre {
  margin: 0.62rem 0 0;
  border-radius: 10px;
  border: 1px solid #324b79;
  background: #0a1227;
  color: #d6e7ff;
  padding: 0.7rem;
  font-size: 0.82rem;
  line-height: 1.35;
  overflow-x: auto;
}

.notes ul {
  margin: 0;
  padding-left: 1rem;
  display: grid;
  gap: 0.32rem;
}

.back-link {
  display: inline-block;
  margin-top: 0.8rem;
  color: #9cf6ff;
  text-decoration: none;
}

.back-link:hover {
  text-decoration: underline;
}

@media (max-width: 820px) {
  .people-grid,
  .sliders,
  .totals-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  .people-grid,
  .sliders,
  .totals-grid {
    grid-template-columns: 1fr;
  }

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

  .assign-btn {
    grid-column: span 2;
  }
}