/* ---------- Theme tokens ---------- */
:root {
  color-scheme: light dark;

  --bg-primary: #fafaf7;
  --bg-secondary: #f1efe8;
  --bg-elevated: #ffffff;
  --text-primary: #1f1f1d;
  --text-secondary: #5f5e5a;
  --text-tertiary: #888780;
  --border-soft: rgba(0, 0, 0, 0.08);
  --border-medium: rgba(0, 0, 0, 0.18);
  --border-strong: rgba(0, 0, 0, 0.32);
  --accent: #534ab7;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.06);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #0d0d10;
    --bg-secondary: #18181c;
    --bg-elevated: #1f1f24;
    --text-primary: #ebeae3;
    --text-secondary: #a8a69d;
    --text-tertiary: #74726a;
    --border-soft: rgba(255, 255, 255, 0.08);
    --border-medium: rgba(255, 255, 255, 0.16);
    --border-strong: rgba(255, 255, 255, 0.3);
    --accent: #aaa3eb;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.5);
  }
}

/* ---------- Reset ---------- */
* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

button { font-family: inherit; }

/* ---------- Layout ---------- */
.container {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 20px;
}

.site-header {
  border-bottom: 0.5px solid var(--border-soft);
  padding: 28px 0;
  background: var(--bg-elevated);
}

.site-header h1 {
  margin: 0;
  font-size: 22px;
  font-weight: 500;
  letter-spacing: -0.01em;
}

.tagline {
  margin: 4px 0 0;
  color: var(--text-secondary);
  font-size: 14px;
}

.tagline em {
  font-style: italic;
  color: var(--text-primary);
}

main {
  padding: 32px 20px 64px;
}

main > section {
  margin-bottom: 48px;
}

.intro {
  color: var(--text-secondary);
  font-size: 15px;
  max-width: 720px;
}

.intro strong {
  color: var(--text-primary);
  font-weight: 500;
}

h2 {
  font-size: 18px;
  font-weight: 500;
  margin: 0 0 4px;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 15px;
  font-weight: 500;
  margin: 0 0 8px;
}

/* ---------- Picker ---------- */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 20px;
}

.status {
  margin: 0;
  font-size: 13px;
  color: var(--text-secondary);
}

.status strong {
  color: var(--text-primary);
  font-weight: 500;
}

.actions {
  display: flex;
  gap: 8px;
}

.btn-secondary {
  background: var(--bg-elevated);
  border: 0.5px solid var(--border-medium);
  color: var(--text-secondary);
  font-size: 13px;
  padding: 6px 12px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.btn-secondary:hover {
  background: var(--bg-secondary);
  border-color: var(--border-strong);
  color: var(--text-primary);
}

.btn-secondary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.elem-group {
  margin-bottom: 18px;
}

.elem-group-head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.elem-group-name {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.elem-group-count {
  font-size: 12px;
  color: var(--text-tertiary);
}

.character-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 8px;
}

.char-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border-radius: var(--radius-md);
  border: 0.5px solid var(--border-soft);
  background: var(--bg-elevated);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, transform 0.05s;
  font: inherit;
  text-align: left;
  color: var(--text-primary);
}

.char-btn:hover {
  border-color: var(--border-medium);
}

.char-btn:active {
  transform: translateY(1px);
}

.char-btn.is-selected {
  border-color: var(--text-primary);
  background: var(--bg-elevated);
  box-shadow: var(--shadow-sm);
}

.char-btn.is-selected .char-name {
  font-weight: 500;
}

.char-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
  border: 0.5px solid rgba(0, 0, 0, 0.12);
}

.char-name {
  flex: 1;
  font-size: 14px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.char-rank {
  font-size: 11px;
  color: var(--text-tertiary);
  font-weight: 500;
  letter-spacing: 0.04em;
}

/* ---------- Wheel ---------- */
.wheel-section h2 {
  margin-bottom: 16px;
}

.wheel-wrap {
  background: var(--bg-elevated);
  border: 0.5px solid var(--border-soft);
  border-radius: var(--radius-lg);
  padding: 16px;
  box-shadow: var(--shadow-sm);
}

.wheel-wrap svg {
  width: 100%;
  height: auto;
  display: block;
}

.wheel-line {
  stroke: var(--text-tertiary);
  stroke-width: 0.5;
  opacity: 0.5;
}

.elem-node rect {
  stroke-width: 0.5;
  transition: opacity 0.2s;
}

.elem-node[data-element="cosmos"]      rect { fill: #E6F1FB; stroke: #185FA5; }
.elem-node[data-element="anima"]       rect { fill: #E1F5EE; stroke: #0F6E56; }
.elem-node[data-element="incantation"] rect { fill: #FAEEDA; stroke: #854F0B; }
.elem-node[data-element="chaos"]       rect { fill: #FAECE7; stroke: #993C1D; }
.elem-node[data-element="psyche"]      rect { fill: #EEEDFE; stroke: #3C3489; }
.elem-node[data-element="lakshana"]    rect { fill: #FBEAF0; stroke: #72243E; }

.elem-node[data-element="cosmos"]      .elem-title { fill: #0C447C; }
.elem-node[data-element="anima"]       .elem-title { fill: #085041; }
.elem-node[data-element="incantation"] .elem-title { fill: #633806; }
.elem-node[data-element="chaos"]       .elem-title { fill: #712B13; }
.elem-node[data-element="psyche"]      .elem-title { fill: #26215C; }
.elem-node[data-element="lakshana"]    .elem-title { fill: #4B1528; }

.elem-node[data-element="cosmos"]      .elem-list { fill: #185FA5; }
.elem-node[data-element="anima"]       .elem-list { fill: #0F6E56; }
.elem-node[data-element="incantation"] .elem-list { fill: #854F0B; }
.elem-node[data-element="chaos"]       .elem-list { fill: #993C1D; }
.elem-node[data-element="psyche"]      .elem-list { fill: #3C3489; }
.elem-node[data-element="lakshana"]    .elem-list { fill: #72243E; }

@media (prefers-color-scheme: dark) {
  .elem-node[data-element="cosmos"]      rect { fill: #0C447C; stroke: #85B7EB; }
  .elem-node[data-element="anima"]       rect { fill: #085041; stroke: #5DCAA5; }
  .elem-node[data-element="incantation"] rect { fill: #633806; stroke: #EF9F27; }
  .elem-node[data-element="chaos"]       rect { fill: #712B13; stroke: #F0997B; }
  .elem-node[data-element="psyche"]      rect { fill: #3C3489; stroke: #AFA9EC; }
  .elem-node[data-element="lakshana"]    rect { fill: #72243E; stroke: #ED93B1; }

  .elem-node[data-element="cosmos"]      .elem-title { fill: #B5D4F4; }
  .elem-node[data-element="anima"]       .elem-title { fill: #9FE1CB; }
  .elem-node[data-element="incantation"] .elem-title { fill: #FAC775; }
  .elem-node[data-element="chaos"]       .elem-title { fill: #F5C4B3; }
  .elem-node[data-element="psyche"]      .elem-title { fill: #CECBF6; }
  .elem-node[data-element="lakshana"]    .elem-title { fill: #F4C0D1; }

  .elem-node[data-element="cosmos"]      .elem-list { fill: #85B7EB; }
  .elem-node[data-element="anima"]       .elem-list { fill: #5DCAA5; }
  .elem-node[data-element="incantation"] .elem-list { fill: #EF9F27; }
  .elem-node[data-element="chaos"]       .elem-list { fill: #F0997B; }
  .elem-node[data-element="psyche"]      .elem-list { fill: #AFA9EC; }
  .elem-node[data-element="lakshana"]    .elem-list { fill: #ED93B1; }
}

.elem-node.is-empty rect,
.elem-node.is-empty text {
  opacity: 0.4;
}

.elem-title {
  font-size: 14px;
  font-weight: 500;
  font-family: var(--font-sans);
}

.elem-list {
  font-size: 12px;
  font-family: var(--font-sans);
  transition: opacity 0.2s;
}

.elem-list.is-empty {
  opacity: 0.5;
}

.reaction-label {
  font-size: 12px;
  font-weight: 500;
  font-family: var(--font-sans);
  fill: var(--text-tertiary);
  opacity: 0.4;
  transition: opacity 0.2s, fill 0.2s;
}

.reaction-label.is-active {
  opacity: 1;
  fill: var(--text-primary);
}

/* ---------- Reactions ---------- */
.reactions-info {
  margin-top: 24px;
}

.reaction-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
  margin-top: 12px;
}

.reaction-card {
  background: var(--bg-elevated);
  border: 0.5px solid var(--border-soft);
  border-radius: var(--radius-md);
  padding: 12px 14px;
}

.reaction-card-name {
  font-size: 14px;
  font-weight: 500;
  margin: 0 0 4px;
}

.reaction-card-elements {
  font-size: 11px;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 0 0 8px;
}

.reaction-card-effect {
  font-size: 13px;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.5;
}

.reaction-card.is-trio {
  border-color: var(--text-primary);
  background: var(--bg-secondary);
}

.muted {
  color: var(--text-secondary);
  font-size: 14px;
}

/* ---------- Legend ---------- */
.legend {
  border-top: 0.5px solid var(--border-soft);
  padding-top: 32px;
}

.legend-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  margin-top: 16px;
}

.legend-grid p {
  margin: 0;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.legend-grid strong {
  color: var(--text-primary);
  font-weight: 500;
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 0.5px solid var(--border-soft);
  padding: 24px 0 32px;
  margin-top: 32px;
  font-size: 13px;
  color: var(--text-secondary);
}

.site-footer p {
  margin: 0 0 4px;
}

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--text-primary);
  color: var(--bg-primary);
  padding: 10px 16px;
  border-radius: var(--radius-md);
  font-size: 13px;
  box-shadow: var(--shadow-md);
  opacity: 0;
  transition: opacity 0.2s, transform 0.2s;
  pointer-events: none;
  z-index: 100;
}

.toast.is-visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ---------- Responsive ---------- */
@media (max-width: 600px) {
  .site-header { padding: 20px 0; }
  .site-header h1 { font-size: 19px; }
  main { padding: 20px 16px 40px; }
  .container { padding: 0 16px; }
  .section-header { flex-direction: column; align-items: stretch; }
  .actions { justify-content: flex-end; }
  main > section { margin-bottom: 36px; }
  .character-grid { grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}