:root {
  --bg: #f1eadf;
  --paper: rgba(255, 252, 246, 0.92);
  --paper-strong: rgba(255, 252, 246, 0.98);
  --ink: #1f2330;
  --muted: #5d6474;
  --line: rgba(31, 35, 48, 0.12);
  --teal: #246a73;
  --coral: #dd6e42;
  --sage: #7c9885;
  --shadow: 0 20px 52px rgba(62, 44, 16, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Avenir Next", "Segoe UI", "Helvetica Neue", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(221, 110, 66, 0.18), transparent 26%),
    radial-gradient(circle at top right, rgba(36, 106, 115, 0.16), transparent 22%),
    radial-gradient(circle at 50% 120%, rgba(124, 152, 133, 0.16), transparent 30%),
    linear-gradient(145deg, #f7f2e8 0%, #ece2d2 44%, #d9ccb3 100%);
}

.shell {
  width: min(1520px, calc(100vw - 36px));
  margin: 0 auto;
  padding: 18px 0 30px;
}

.home-link {
  display: inline-flex;
  align-items: center;
  margin-bottom: 14px;
  color: var(--teal);
  text-decoration: none;
  font-weight: 700;
}

.hero {
  max-width: 880px;
  padding: 2px 4px 14px;
}

.eyebrow {
  margin: 0 0 8px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-size: 0.72rem;
  color: var(--coral);
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.2rem, 4.2vw, 3.8rem);
  line-height: 0.95;
}

.lede {
  margin: 12px 0 0;
  max-width: 68ch;
  color: var(--muted);
  line-height: 1.58;
}

.hero-ribbon {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.hero-chip,
.badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
}

.hero-chip {
  background: rgba(255, 251, 244, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.8);
  box-shadow: 0 10px 20px rgba(82, 57, 20, 0.08);
}

.app-layout {
  display: grid;
  grid-template-columns: minmax(280px, 320px) minmax(0, 1fr);
  gap: 18px;
  margin-top: 12px;
  align-items: start;
}

.sidebar {
  display: grid;
  gap: 16px;
}

.main-stack {
  display: grid;
  gap: 18px;
  min-width: 0;
}

.visual-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(420px, 0.92fr);
  gap: 18px;
  align-items: start;
}

.card {
  background: var(--paper);
  border: 1px solid rgba(255, 255, 255, 0.85);
  border-radius: 22px;
  padding: 15px 16px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.table-card {
  padding: 14px 16px 12px;
  background:
    radial-gradient(circle at top left, rgba(36, 106, 115, 0.055), transparent 28%),
    linear-gradient(180deg, rgba(255, 252, 246, 0.97), rgba(251, 247, 240, 0.92));
}

.distribution-card {
  padding: 14px 16px 14px;
}

.model-note-card {
  background:
    radial-gradient(circle at top right, rgba(124, 152, 133, 0.08), transparent 34%),
    linear-gradient(180deg, rgba(255, 252, 246, 0.96), rgba(248, 243, 235, 0.9));
}

.card-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.card-head h2 {
  margin: 0;
}

.badge {
  background: rgba(36, 106, 115, 0.12);
}

.card-actions {
  display: inline-flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
}

.field {
  display: grid;
  gap: 8px;
  margin-top: 12px;
}

.field label,
.metric-label {
  font-size: 0.92rem;
  font-weight: 700;
}

.input-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 100px auto;
  gap: 10px;
  align-items: center;
}

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

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

input[type="number"],
input[type="text"],
select {
  width: 100%;
  padding: 9px 11px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.82);
  color: var(--ink);
}

.unit,
.helper-text,
.small-text {
  color: var(--muted);
}

.helper-text,
.small-text {
  margin: 0;
  line-height: 1.5;
}

.helper-text a,
.small-text a {
  color: var(--teal);
}

.summary-grid,
.distribution-grid {
  display: grid;
  gap: 10px;
}

.summary-grid {
  grid-template-columns: repeat(2, minmax(120px, 1fr));
}

.distribution-grid {
  grid-template-columns: repeat(2, minmax(160px, 1fr));
}

.metric-card,
.distribution-stat {
  padding: 13px 14px;
  border-radius: 16px;
  border: 1px solid rgba(31, 35, 48, 0.08);
  background:
    radial-gradient(circle at top right, rgba(255, 255, 255, 0.62), transparent 38%),
    linear-gradient(160deg, rgba(255, 255, 255, 0.86), rgba(247, 241, 231, 0.76));
}

.viz-card {
  background:
    radial-gradient(circle at top, rgba(36, 106, 115, 0.06), transparent 38%),
    linear-gradient(135deg, var(--paper-strong), rgba(250, 244, 234, 0.9));
}

.canvas-wrap {
  display: flex;
  justify-content: center;
  padding: 2px 0 0;
}

#vesicle-canvas {
  width: min(100%, 420px);
  height: auto;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.72);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.82),
    0 18px 35px rgba(98, 73, 34, 0.08);
  background:
    radial-gradient(circle at 50% 20%, rgba(255, 255, 255, 0.68), transparent 42%),
    linear-gradient(180deg, rgba(245, 240, 231, 0.84), rgba(241, 233, 219, 0.58));
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.84rem;
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.legend-dot {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  display: inline-block;
  border: 1px solid rgba(31, 35, 48, 0.08);
}

.metric-label {
  display: block;
  color: var(--muted);
}

.metric-value {
  display: block;
  margin-top: 7px;
  font-size: 1.22rem;
  line-height: 1.1;
}

.ghost-button {
  width: fit-content;
  padding: 9px 13px;
  border-radius: 999px;
  border: 1px solid rgba(36, 106, 115, 0.18);
  background: rgba(36, 106, 115, 0.08);
  color: var(--teal);
  font-weight: 700;
  cursor: pointer;
}

.table-wrap {
  overflow-x: auto;
  margin-top: 10px;
  border-radius: 18px;
  border: 1px solid rgba(31, 35, 48, 0.06);
  background: rgba(255, 255, 255, 0.46);
}

.lipid-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 980px;
}

.lipid-table th,
.lipid-table td {
  padding: 10px 9px;
  border-bottom: 1px solid rgba(31, 35, 48, 0.08);
  text-align: left;
  vertical-align: middle;
}

.lipid-row {
  background:
    linear-gradient(90deg, var(--row-tint, rgba(36, 106, 115, 0.06)), rgba(255, 255, 255, 0) 32%);
}

.lipid-row td:first-child {
  border-left: 4px solid var(--row-accent, rgba(36, 106, 115, 0.95));
}

.lipid-table th {
  color: var(--muted);
  font-size: 0.76rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  position: sticky;
  top: 0;
  background: rgba(249, 244, 236, 0.96);
  backdrop-filter: blur(6px);
  z-index: 1;
}

.lipid-table td strong {
  font-size: 0.95rem;
}

.row-actions {
  display: flex;
  justify-content: flex-end;
}

.color-cell {
  width: 66px;
}

.color-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 999px;
  border: 1px solid rgba(31, 35, 48, 0.12);
  box-shadow:
    0 0 0 5px var(--row-tint, rgba(36, 106, 115, 0.12)),
    inset 0 1px 0 rgba(255, 255, 255, 0.45);
}

.mini-button {
  padding: 6px 9px;
  border-radius: 999px;
  border: 1px solid rgba(221, 110, 66, 0.2);
  background: rgba(221, 110, 66, 0.1);
  color: var(--coral);
  cursor: pointer;
  font-weight: 700;
}

.balance-pill,
.select-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 5px 9px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 800;
}

.balance-pill {
  background: rgba(124, 152, 133, 0.14);
  color: #4c6959;
}

.select-pill {
  border: 1px solid rgba(36, 106, 115, 0.16);
  background: rgba(36, 106, 115, 0.08);
  color: var(--teal);
  cursor: pointer;
}

.select-pill.active {
  background: linear-gradient(135deg, var(--teal), #194f54);
  color: white;
}

.area-stack {
  display: grid;
  gap: 6px;
  min-width: 210px;
}

.area-input-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
  align-items: center;
}

.area-source {
  font-size: 0.76rem;
}

.plot-wrap {
  margin-top: 12px;
  padding: 10px 12px;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.72);
  background:
    radial-gradient(circle at top, rgba(255, 255, 255, 0.82), transparent 48%),
    linear-gradient(180deg, rgba(247, 243, 236, 0.92), rgba(243, 236, 225, 0.75));
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.8),
    0 10px 24px rgba(73, 54, 22, 0.05);
}

#distribution-canvas {
  width: 100%;
  height: 280px;
  display: block;
}

.stat-list {
  display: grid;
  gap: 10px 16px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 0;
}

.stat-list-compact {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 12px;
}

.stat-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(31, 35, 48, 0.08);
  font-size: 0.9rem;
}

.stat-row strong {
  text-align: right;
}

.distribution-note {
  margin-top: 12px;
  max-width: 62ch;
}

.site-footer {
  width: min(1520px, calc(100vw - 36px));
  margin: 0 auto 24px;
  padding-bottom: 10px;
  color: rgba(31, 35, 48, 0.75);
  font-size: 0.92rem;
  line-height: 1.6;
}

.site-footer p {
  margin: 0;
}

.site-footer p + p {
  margin-top: 4px;
}

.site-footer a {
  color: var(--teal);
}

@media (min-width: 1460px) {
  .app-layout {
    grid-template-columns: minmax(300px, 330px) minmax(0, 1fr);
    gap: 20px;
  }

  .visual-grid {
    grid-template-columns: minmax(560px, 1.06fr) minmax(500px, 0.94fr);
    gap: 20px;
  }

  #vesicle-canvas {
    width: min(100%, 450px);
  }
}

@media (max-width: 1180px) {
  .app-layout,
  .visual-grid {
    grid-template-columns: 1fr;
  }

  .stat-list,
  .stat-list-compact {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .shell,
  .site-footer {
    width: min(100vw - 18px, 100%);
  }

  .card {
    padding: 16px;
    border-radius: 18px;
  }

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

  .card-head {
    flex-direction: column;
    align-items: flex-start;
  }

  .card-actions {
    justify-content: flex-start;
  }

  .summary-grid,
  .distribution-grid {
    grid-template-columns: 1fr;
  }

  #vesicle-canvas {
    width: min(100%, 320px);
  }

  #distribution-canvas {
    height: 220px;
  }
}