:root {
  --bg: #0d0f14;
  --bg-elevated: #161923;
  --bg-elevated-2: #1e2230;
  --border: #2a2f3f;
  --text: #f2f3f7;
  --text-muted: #9aa0b4;
  --accent: #7c9eff;
  --accent-strong: #5b7cfa;
  --danger: #ff6b6b;
  --radius: 14px;
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
  color-scheme: dark;
}

body[data-theme='light'] {
  --bg: #f5f6fa;
  --bg-elevated: #ffffff;
  --bg-elevated-2: #eef0f7;
  --border: #dde1ec;
  --text: #14161f;
  --text-muted: #5b6072;
  --accent: #3f63e0;
  --accent-strong: #3454c9;
  --shadow: 0 8px 24px rgba(20, 22, 31, 0.08);
  color-scheme: light;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  min-height: 100vh;
  padding-bottom: 24px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 10;
}

.brand { display: flex; align-items: center; gap: 10px; }
.brand-dot {
  width: 14px; height: 14px; border-radius: 50%;
  background: conic-gradient(from 90deg, #ff5f5f, #ffd15f, #5fff9e, #5fd4ff, #7c9eff, #d15fff, #ff5f5f);
  box-shadow: 0 0 10px rgba(124, 158, 255, 0.6);
}
.brand h1 { font-size: 1.15rem; margin: 0; letter-spacing: 0.02em; }

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

.app {
  max-width: 720px;
  margin: 0 auto;
  padding: 20px 16px 8px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.panel {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}

.panel h2 {
  margin: 0 0 12px;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.panel-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}
.panel-header-row h2 { margin: 0; }

.palette-source {
  margin: -4px 0 12px;
}

.btn {
  font: inherit;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-elevated-2);
  color: var(--text);
  padding: 9px 14px;
  cursor: pointer;
  transition: transform 0.05s ease, background 0.15s ease, border-color 0.15s ease;
}
.btn:hover { border-color: var(--accent); }
.btn:active { transform: scale(0.97); }
.btn-ghost { background: transparent; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #0d0f14; font-weight: 600; }
.btn-primary:hover { background: var(--accent-strong); border-color: var(--accent-strong); }
.btn-small { padding: 6px 10px; font-size: 0.85rem; }
.btn-icon { padding: 8px 10px; }

.file-btn { display: inline-flex; align-items: center; gap: 6px; }

.base-color-row {
  display: flex;
  gap: 10px;
  align-items: center;
}
#colorPicker {
  width: 52px; height: 44px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: none;
  padding: 2px;
  cursor: pointer;
}
#hexInput {
  flex: 1;
  font: inherit;
  font-family: 'SFMono-Regular', Consolas, monospace;
  letter-spacing: 0.05em;
  background: var(--bg-elevated-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  padding: 10px 12px;
  min-width: 0;
}
#hexInput:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

.wheel-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.wheel-wrap {
  position: relative;
  width: min(240px, 68vw);
  aspect-ratio: 1 / 1;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}

.color-wheel {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  display: block;
  box-shadow: 0 0 0 1px var(--border), inset 0 0 12px rgba(0, 0, 0, 0.25);
  cursor: grab;
  touch-action: none;
}
.wheel-wrap.dragging .color-wheel { cursor: grabbing; }

.wheel-handle {
  position: absolute;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 3px solid #fff;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.4), 0 2px 6px rgba(0, 0, 0, 0.45);
  transform: translate(-50%, -50%);
  pointer-events: none;
  left: 50%;
  top: 50%;
  z-index: 2;
}

.wheel-overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  overflow: visible;
  z-index: 1;
}

.wheel-hint {
  text-align: center;
  margin: 0;
}

.brightness-row {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  max-width: 320px;
}
.brightness-row label {
  font-size: 0.78rem;
  color: var(--text-muted);
  flex-shrink: 0;
}
.brightness-row input[type='range'] {
  flex: 1;
  accent-color: var(--accent);
}
.brightness-value {
  font-size: 0.78rem;
  color: var(--text-muted);
  width: 40px;
  text-align: right;
  flex-shrink: 0;
}

.image-extract-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 12px;
  flex-wrap: wrap;
}

.extracted-dot {
  cursor: pointer;
  transition: r 0.1s ease;
}
.extracted-dot:hover { r: 5.6; }

.chip-row { display: flex; gap: 8px; flex-wrap: wrap; }
.chip {
  font: inherit;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-elevated-2);
  color: var(--text);
  padding: 8px 14px;
  cursor: pointer;
  font-size: 0.88rem;
}
.chip.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #0d0f14;
  font-weight: 600;
}

.panel-center { text-align: center; }
.panel-center h2 { text-align: center; }

.segmented {
  display: flex;
  width: fit-content;
  margin: 0 auto;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}
.segmented button {
  font: inherit;
  border: none;
  background: transparent;
  color: var(--text-muted);
  padding: 8px 16px;
  cursor: pointer;
  border-right: 1px solid var(--border);
  font-size: 0.88rem;
}
.segmented button:last-child { border-right: none; }
.segmented button.active { background: var(--accent); color: #0d0f14; font-weight: 600; }

.palette-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
}

.swatch-card {
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-elevated-2);
  cursor: pointer;
  display: flex;
  flex-direction: column;
}
.swatch-color { height: 84px; width: 100%; }
.swatch-info { padding: 10px 12px 12px; }
.swatch-hex { font-family: Consolas, monospace; font-weight: 700; font-size: 0.95rem; }
.swatch-name { font-size: 0.78rem; color: var(--text-muted); margin: 2px 0 8px; }
.swatch-values { font-size: 0.78rem; color: var(--text-muted); line-height: 1.5; }
.swatch-values b { color: var(--text); font-weight: 600; }
.swatch-hint { font-size: 0.7rem; color: var(--text-muted); margin-top: 8px; opacity: 0.7; }

.cb-grid {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.cb-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.cb-label { width: 130px; font-size: 0.82rem; color: var(--text-muted); flex-shrink: 0; }
.cb-swatches { display: flex; gap: 6px; flex: 1; flex-wrap: wrap; }
.cb-swatch { width: 34px; height: 34px; border-radius: 8px; border: 1px solid var(--border); }

.pantone-disclaimer {
  margin: 12px 2px 0;
  font-size: 0.72rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.proportion-bar {
  display: flex;
  height: 64px;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
}
.bar-segment {
  height: 100%;
  transition: background-color 0.15s ease, width 0.15s ease;
}

.role-legend {
  display: flex;
  gap: 10px;
  margin-top: 12px;
  flex-wrap: wrap;
}
.role-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--border);
  background: var(--bg-elevated-2);
  border-radius: 10px;
  padding: 8px 12px;
  cursor: pointer;
  font-size: 0.8rem;
  color: var(--text);
  flex: 1;
  min-width: 140px;
}
.role-chip:hover { border-color: var(--accent); }
.role-chip-swatch {
  width: 22px; height: 22px;
  border-radius: 6px;
  border: 1px solid rgba(128,128,128,0.35);
  flex-shrink: 0;
}
.role-chip-text { display: flex; flex-direction: column; line-height: 1.35; min-width: 0; }
.role-chip-pct { font-weight: 700; }
.role-chip-hex { font-family: Consolas, monospace; color: var(--text-muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.saved-list { display: flex; flex-direction: column; gap: 8px; }
.saved-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-elevated-2);
}
.saved-item-colors { display: flex; gap: 4px; }
.saved-item-color { width: 20px; height: 20px; border-radius: 5px; }
.saved-item-name { flex: 1; font-size: 0.9rem; }
.saved-item-meta { font-size: 0.72rem; color: var(--text-muted); }
.saved-item-actions { display: flex; gap: 6px; }
.icon-btn {
  border: none; background: none; color: var(--text-muted);
  cursor: pointer; font-size: 1rem; padding: 4px;
}
.icon-btn:hover { color: var(--accent); }
.icon-btn.danger:hover { color: var(--danger); }

.muted { color: var(--text-muted); font-size: 0.85rem; }

.app-footer {
  text-align: center;
  padding: 24px 16px 8px;
}

.toast {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-elevated-2);
  border: 1px solid var(--accent);
  color: var(--text);
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 0.85rem;
  box-shadow: var(--shadow);
  z-index: 100;
  animation: toast-in 0.15s ease;
}
@keyframes toast-in {
  from { opacity: 0; transform: translate(-50%, 8px); }
  to { opacity: 1; transform: translate(-50%, 0); }
}

@media (min-width: 640px) {
  .app { padding-top: 28px; }
}