@import url('https://fonts.googleapis.com/css2?family=DM+Mono:ital,wght@0,300;0,400;0,500;1,300;1,400;1,500&family=Fraunces:ital,opsz,wght@0,9..144,100..900;1,9..144,100..900&display=swap');

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

*:focus-visible {
  outline: 2px solid #005fcc;
  outline-offset: 1px;
}

:root {
  --bg: #f4f4f5;
  --header-bg: #e4e4e7;
  --surface: #ffffff;
  --border: #d1d5db;
  --border-light: #e5e7eb;
  --text: #18181b;
  --text-muted: #6b7280;
  --text-faint: #9ca3af;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.07), 0 4px 16px rgba(0, 0, 0, 0.04);
  --pass-bg: #e8f5e2;
  --pass-text: #2a6016;
  --pass-border: #b4d9a0;
  --fail-bg: #fae8e8;
  --fail-text: #8b1a1a;
  --fail-border: #f0b4b4;
}

[data-theme='dark'] {
  --bg: #18181b;
  --header-bg: #27272a;
  --surface: #27272a;
  --border: #3f3f46;
  --border-light: #3f3f46;
  --text: #f4f4f5;
  --text-muted: #a1a1aa;
  --text-faint: #71717a;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.3), 0 4px 16px rgba(0, 0, 0, 0.2);
  --pass-bg: #14291a;
  --pass-text: #86efac;
  --pass-border: #166534;
  --fail-bg: #2d1515;
  --fail-text: #fca5a5;
  --fail-border: #7f1d1d;
}

body {
  font-family: 'DM Mono', monospace;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

body:has(.screen-size-overlay.visible) {
  overflow: hidden;
}

header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--header-bg);
  color: var(--text);
  border-bottom: 4px solid var(--bg);
}

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.5rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

header h1 {
  font-family: 'Fraunces', serif;
  font-size: 1.7rem;
  font-weight: 400;
  letter-spacing: -0.02em;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.header-btn {
  display: flex;
  align-items: center;
  align-self: stretch;
  background: var(--text);
  color: var(--bg);
  border: none;
  padding: 10px 18px;
  font-family: 'DM Mono', monospace;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  cursor: pointer;
  border-radius: 2px;
  text-decoration: none;
  transition: opacity 0.15s;
}

.header-btn .ph-bold {
  font-size: 1rem;
}

.header-btn:hover {
  opacity: 0.8;
}

.main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 2rem 6rem;
}

.toolbar {
  display: flex;
  align-items: center;
  gap: 20px;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.count-label {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  line-height: 1;
}

.collapse-all-group {
  display: flex;
  align-items: center;
  gap: 2px;
}

.toolbar-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.io-btn-group {
  display: flex;
  align-items: center;
  border-radius: 2px;
}

.io-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  background: none;
  border: none;
  border-radius: 2px;
  padding: 10px 14px;
  font-family: 'DM Mono', monospace;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  cursor: pointer;
  transition:
    background 0.15s,
    color 0.15s;
}

.io-btn .ph-bold {
  font-size: 1rem;
}

.io-btn:hover {
  background: var(--border-light);
  color: var(--text);
}

.reset-btn:hover {
  background: rgba(226, 75, 74, 0.12);
  color: var(--fail-text);
}

.add-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--text);
  color: var(--bg);
  border: none;
  padding: 10px 18px;
  font-family: 'DM Mono', monospace;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  cursor: pointer;
  border-radius: 2px;
  transition: opacity 0.15s;
}

.add-btn:hover {
  opacity: 0.8;
}

.palette-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.palette-card {
  background: var(--surface);
  border: 1px solid var(--border-light);
  border-radius: 8px;
  box-shadow: var(--shadow);
  animation: slideIn 0.2s ease;
  scroll-margin-bottom: 2rem;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-5px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.palette-card.dragging {
  opacity: 0.4;
}

.palette-card.drag-over {
  outline: 2px solid var(--text-muted);
  outline-offset: 2px;
}

.palette-card.collapsed .palette-header {
  border-bottom: none;
}

.palette-card.collapsed .color-inputs-row,
.palette-card.collapsed .format-hint,
.palette-card.collapsed .results-area {
  display: none;
}

.palette-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-light);
  gap: 12px;
}

.drag-handle {
  background: none;
  border: none;
  border-radius: 2px;
  cursor: grab;
  color: var(--text-faint);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2px;
  flex-shrink: 0;
  transition: color 0.15s;
  touch-action: none;
}

.drag-handle .ph-bold {
  font-size: 1rem;
}

.drag-handle:hover {
  color: var(--text-muted);
}

.drag-handle:active {
  cursor: grabbing;
}

.collapse-btn {
  background: none;
  border: none;
  border-radius: 2px;
  cursor: pointer;
  color: var(--text-faint);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2px;
  flex-shrink: 0;
  transition: color 0.15s;
}

.collapse-btn .ph-bold {
  font-size: 1rem;
  transition: transform 0.2s ease;
}

.collapse-btn:hover {
  color: var(--text-muted);
}

.palette-card.collapsed .collapse-btn .ph-bold {
  transform: rotate(-90deg);
}

.copy-palette-btn {
  background: none;
  border: none;
  border-radius: 2px;
  color: var(--text-faint);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2px;
  transition: color 0.15s;
  flex-shrink: 0;
}

.copy-palette-btn .ph-bold {
  font-size: 1rem;
  transition: transform 0.15s;
}

.copy-palette-btn:hover {
  color: var(--text-muted);
}

.copy-palette-btn.copied {
  color: var(--pass-text, #22a655);
}

.palette-name-input {
  background: transparent;
  border: none;
  font-family: 'Fraunces', serif;
  font-size: 1.1rem;
  font-weight: 300;
  font-style: italic;
  color: var(--text);
  outline: none;
  flex: 1;
  min-width: 0;
}

.palette-name-input::placeholder {
  color: var(--text-faint);
}

.palette-warning-icon {
  font-size: 1rem;
  color: #ffffff;
  background: #d97706;
  flex-shrink: 0;
  align-self: stretch;
  padding: 0 8px;
  margin-inline: 16px 14px;
  border-radius: 3px;
  display: flex;
  align-items: center;
}

.header-swatches {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
}

.header-swatch {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1px solid #888;
  background-image: repeating-conic-gradient(#888 0% 25%, #fff 0% 50%);
  background-size: 8px 8px;
  background-origin: border-box;
}

.remove-palette-btn {
  background: none;
  border: none;
  border-radius: 2px;
  cursor: pointer;
  color: var(--text-faint);
  font-family: 'DM Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  padding: 3px 6px;
  transition: color 0.15s;
}

.remove-palette-btn:not(:disabled):hover {
  color: var(--fail-text);
}

.remove-palette-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.color-inputs-row {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  border-bottom: 1px solid var(--border-light);
}

.color-slot {
  padding: 1.1rem 1rem 1rem;
  border-right: 1px solid var(--border-light);
}

.color-slot:last-child {
  border-right: none;
}

.color-slot.invalid {
  background: rgba(226, 75, 74, 0.12);
}

.color-slot.invalid .swatch-btn {
  background-image: repeating-conic-gradient(#888 0% 25%, #fff 0% 50%);
  background-size: 12px 12px;
  background-origin: border-box;
}

.slot-label {
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  margin-bottom: 9px;
}

.swatch-row {
  display: flex;
  gap: 8px;
  margin-bottom: 7px;
}

.swatch-btn {
  width: 36px;
  height: 36px;
  border-radius: 4px;
  border: 1px solid var(--border);
  cursor: pointer;
  flex-shrink: 0;
  position: relative;
  transition: transform 0.1s;
}

.swatch-btn:hover {
  transform: scale(1.07);
}

.swatch-btn input[type='color'] {
  position: absolute;
  inset: -4px;
  width: calc(100% + 8px);
  height: calc(100% + 8px);
  opacity: 0;
  cursor: pointer;
}

.swatch-btn input[type='color']:focus-visible {
  outline: none;
}

.swatch-btn:focus-within {
  outline: 2px solid #005fcc;
  outline-offset: 1px;
}

.swatch-values {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.swatch-hex {
  font-size: 0.68rem;
  color: var(--text-muted);
}

.swatch-hsl {
  font-size: 0.68rem;
  color: var(--text-faint);
}

.hex-input {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 6px 8px;
  font-family: 'DM Mono', monospace;
  font-size: 0.8rem;
  color: var(--text);
  outline: none;
  transition: border-color 0.15s;
}

.hex-input:focus-visible {
  outline: 2px solid #005fcc;
  outline-offset: 1px;
}

.format-hint {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 6px 1rem;
  font-size: 0.65rem;
  letter-spacing: 0.04em;
  color: var(--text-faint);
  border-bottom: 1px solid var(--border-light);
}

.format-hint .ph-bold {
  font-size: 1rem;
  flex-shrink: 0;
}

.results-area {
  padding: 1.1rem 1.25rem 1.4rem;
}

.results-table {
  width: 100%;
  border-collapse: collapse;
}

.results-table th {
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--text-faint);
  font-weight: 400;
  padding: 0 6px 10px;
  text-align: center;
}

.results-table th.pair-th {
  text-align: left;
  padding-left: 0;
  min-width: 160px;
}

.th-inner {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
}

.tooltip-wrap {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.tooltip-icon {
  font-size: 1rem;
  color: var(--text-faint);
  cursor: default;
  flex-shrink: 0;
  transition: color 0.15s;
}

.tooltip-wrap:hover .tooltip-icon {
  color: var(--text-muted);
}

.tooltip-box {
  position: absolute;
  bottom: calc(100% + 8px);
  right: 50%;
  transform: translateX(10%);
  width: 220px;
  background: var(--text);
  color: var(--bg);
  border-radius: 6px;
  padding: 11px 12px 10px;
  z-index: 200;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
  white-space: normal;
  text-align: left;
  text-transform: none;
  letter-spacing: 0;
}

.tooltip-wrap:hover .tooltip-box {
  opacity: 1;
}

.tooltip-sc {
  font-size: 0.58rem;
  opacity: 0.5;
  margin-bottom: 7px;
  letter-spacing: 0.02em;
}

.tooltip-desc {
  font-size: 0.65rem;
  line-height: 1.55;
  opacity: 0.8;
}

.results-table td {
  padding: 4px 5px;
  vertical-align: middle;
}

.results-table td.pair-td {
  padding: 4px 8px 4px 0;
}

.pair-label {
  display: flex;
  align-items: center;
  gap: 8px;
}

.pair-preview {
  width: 44px;
  height: 26px;
  border-radius: 3px;
  border: 1px solid rgba(0, 0, 0, 0.1);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 500;
  font-family: 'DM Mono', monospace;
  letter-spacing: -0.02em;
}

.pair-text {
  font-size: 0.76rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.ratio-cell {
  font-size: 0.92rem;
  font-family: 'Fraunces', serif;
  font-weight: 300;
  text-align: center;
  color: var(--text);
  padding: 4px 10px;
  white-space: nowrap;
}

.pill {
  border-radius: 3px;
  padding: 5px 7px;
  text-align: center;
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.pill.pass {
  background: var(--pass-bg);
  color: var(--pass-text);
  border: 1px solid var(--pass-border);
}

.pill.fail {
  background: var(--fail-bg);
  color: var(--fail-text);
  border: 1px solid var(--fail-border);
}

.pill.na {
  background: transparent;
  color: var(--text-faint);
  border: 1px solid var(--border-light);
}

.screen-size-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: var(--bg);
  align-items: center;
  justify-content: center;
  text-align: center;
}

.screen-size-overlay.visible {
  display: flex;
}

.screen-size-overlay__content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 40px;
  max-width: 360px;
  color: var(--text-muted);
}

.screen-size-overlay__content i {
  font-size: 48px;
  color: var(--text-faint);
}

.screen-size-overlay__content p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-muted);
}

.screen-size-overlay__content strong {
  color: var(--text);
}

.screen-size-overlay__current {
  font-size: 12px;
  color: var(--text-faint);
}

.scroll-top-btn {
  position: fixed;
  bottom: 1.75rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--text);
  color: var(--bg);
  border: none;
  border-radius: 2px;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transition:
    opacity 0.2s,
    transform 0.2s;
}

.scroll-top-btn .ph-bold {
  font-size: 1rem;
}

.scroll-top-btn.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%);
}

.scroll-top-btn:hover {
  opacity: 0.8;
}