:root {
  --bg: #0b0b0c;
  --line: rgba(255, 255, 255, 0.16);
  --text: #f8f7f3;
  --muted: rgba(248, 247, 243, 0.72);
  --chrome-1: rgba(6, 6, 6, 0.96);
  --chrome-2: rgba(8, 8, 8, 0.82);
  --chip-bg: rgba(255, 255, 255, 0.08);
  --chip-fg: rgba(255, 255, 255, 0.9);
  --chip-border: rgba(255, 255, 255, 0.16);
  --chip-active-bg: #ffffff;
  --chip-active-fg: #111111;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: 'Archivo', 'PingFang SC', sans-serif;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  padding: 16px 16px 12px;
  backdrop-filter: blur(14px);
  background: linear-gradient(180deg, var(--chrome-1), var(--chrome-2));
  border-bottom: 1px solid var(--line);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.28);
}

.topbar-main {
  display: block;
}

.controls-row {
  margin-top: 10px;
  display: flex;
  align-items: center;
}

.browse-controls {
  margin-top: 10px;
  display: block;
}

.kicker {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

h1 {
  margin: 4px 0 0;
  font-size: clamp(20px, 2.6vw, 32px);
  font-family: 'Noto Serif SC', serif;
  line-height: 1.2;
}

.filters {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 2px;
}

.filters::-webkit-scrollbar {
  height: 7px;
}

.filters::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.3);
  border-radius: 999px;
}

.filter-btn {
  white-space: nowrap;
  border: 1px solid var(--chip-border);
  border-radius: 999px;
  padding: 6px 12px;
  background: var(--chip-bg);
  color: var(--chip-fg);
  font-size: 12px;
  cursor: pointer;
}

.filter-btn.active {
  background: var(--chip-active-bg);
  color: var(--chip-active-fg);
  border-color: var(--chip-active-bg);
}

.palette-board {
  margin: 0;
  padding: 2px;
  display: grid;
  gap: 2px;
}

.palette-board::-webkit-scrollbar {
  height: 0;
}

.palette-board::-webkit-scrollbar-thumb {
  background: transparent;
}

.mode-tabs {
  margin-top: 0;
  display: inline-flex;
  width: max-content;
  justify-self: start;
  gap: 4px;
  padding: 4px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 14px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08), 0 8px 20px rgba(0, 0, 0, 0.26);
}

.mode-tab {
  position: relative;
  border: 1px solid transparent;
  border-radius: 10px;
  background: transparent;
  color: rgba(255, 255, 255, 0.82);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 7px 14px;
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.mode-tab:hover {
  color: rgba(255, 255, 255, 0.95);
  border-color: rgba(255, 255, 255, 0.24);
  background: rgba(255, 255, 255, 0.06);
}

.mode-tab.active {
  background: linear-gradient(180deg, #f5efe2, #e8dcc3);
  color: #15110b;
  border-color: rgba(255, 255, 255, 0.7);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.84), 0 6px 14px rgba(0, 0, 0, 0.28);
}

.palette-card {
  min-width: 0;
  border: 0;
  border-radius: 0;
  background: #0c0d10;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.26);
  display: grid;
  grid-template-columns: minmax(210px, 280px) 1fr;
  gap: 2px;
  align-items: stretch;
}

.palette-meta {
  padding: 14px;
  display: flex;
  flex-direction: column;
  background: linear-gradient(165deg, rgba(23, 23, 26, 0.98), rgba(9, 9, 10, 0.94));
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.1);
}

.palette-name {
  margin: 0;
  font-family: 'Noto Serif SC', serif;
  font-size: clamp(24px, 2.3vw, 34px);
  font-weight: 700;
  line-height: 1.12;
  color: rgba(255, 255, 255, 0.96);
}

.palette-swatches {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 2px;
}

.palette-swatch {
  width: 100%;
  min-height: 186px;
  border-radius: 0;
  border: 0;
  position: relative;
  overflow: clip;
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.09);
  cursor: pointer;
  transition: box-shadow 0.2s ease;
}

.palette-swatch-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: grid;
  align-content: end;
  gap: 3px;
  padding: 12px;
  transition: transform 0.2s ease;
}

.palette-swatch:hover,
.palette-swatch:focus-visible {
  z-index: 2;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.36);
}

.palette-swatch.palette-flash {
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.36), 0 10px 26px rgba(0, 0, 0, 0.34);
}

.palette-role,
.palette-color-name,
.palette-hex {
  margin: 0;
  text-shadow: 0 3px 18px rgba(0, 0, 0, 0.4);
}

.palette-role {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  opacity: 0.9;
}

.palette-color-name {
  font-family: 'Noto Serif SC', serif;
  font-size: clamp(20px, 2vw, 30px);
  font-weight: 700;
  line-height: 1.08;
}

.palette-hex {
  font-size: 12px;
  opacity: 0.95;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.palette-hint {
  font-size: 11px;
  font-weight: 600;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.16s ease, transform 0.16s ease;
  text-shadow: 0 3px 18px rgba(0, 0, 0, 0.4);
}

.palette-swatch:hover .palette-swatch-overlay,
.palette-swatch:focus-visible .palette-swatch-overlay {
  transform: translateY(-2px);
}

.palette-swatch:hover .palette-hint,
.palette-swatch:focus-visible .palette-hint,
.palette-swatch.palette-flash .palette-hint {
  opacity: 0.82;
  transform: translateY(0);
}

.wall {
  min-height: calc(100vh - 238px);
  display: grid;
  gap: 2px;
  padding: 2px;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  grid-auto-rows: clamp(190px, 18vw, 260px);
}

.tile {
  position: relative;
  border: 0;
  margin: 0;
  padding: 0;
  overflow: hidden;
  cursor: pointer;
  transition: box-shadow 0.2s ease;
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.09);
}

.tile::before {
  content: none;
}

.tile::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0);
  transition: box-shadow 0.2s ease;
}

.tile:hover,
.tile:focus-visible {
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.32), 0 10px 26px rgba(0, 0, 0, 0.34);
  z-index: 2;
}

.tile-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: grid;
  align-content: end;
  gap: 4px;
  padding: 12px;
  transition: transform 0.2s ease;
}

.tile:hover::after,
.tile:focus-visible::after,
.tile.flash::after {
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.36);
}

.tile:hover .tile-overlay,
.tile:focus-visible .tile-overlay {
  transform: translateY(-2px);
}

.tile-pinyin,
.tile-name,
.tile-code,
.tile-hint {
  margin: 0;
  text-shadow: 0 3px 18px rgba(0, 0, 0, 0.4);
}

.tile-pinyin {
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0.92;
}

.tile-name {
  font-family: 'Noto Serif SC', serif;
  font-size: clamp(24px, 2.5vw, 34px);
  line-height: 1.06;
}

.tile-code {
  font-size: 12px;
  opacity: 0.95;
  font-weight: 600;
}

.tile-hint {
  font-size: 11px;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.16s ease, transform 0.16s ease;
}

.tile:hover .tile-hint,
.tile:focus-visible .tile-hint,
.tile.flash .tile-hint {
  opacity: 0.82;
  transform: translateY(0);
}

.empty {
  grid-column: 1 / -1;
  min-height: clamp(320px, 48vh, 520px);
  display: grid;
  place-items: center;
  padding: 16px 12px;
  text-align: center;
}

.empty-line {
  margin: 0;
  font-size: clamp(16px, 2.1vw, 20px);
  line-height: 1.4;
  color: rgba(255, 255, 255, 0.72);
}

body:not(.view-palettes) .palette-board {
  display: none;
}

body.view-palettes .filters,
body.view-palettes .browse-controls,
body.view-palettes .wall {
  display: none;
}

body.view-palettes .palette-board {
  display: grid;
  grid-template-columns: 1fr;
  overflow: visible;
  gap: 2px;
  margin: 0;
  min-height: calc(100vh - 180px);
}

body.view-palettes .palette-card {
  min-width: 0;
}

body.view-palettes .palette-meta {
  justify-content: center;
}

@media (max-width: 900px) {
  .controls-row {
    display: flex;
  }

  .palette-board {
    margin-inline: 0;
  }
}

@media (min-width: 640px) and (max-width: 900px) {
  .wall {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    grid-auto-rows: clamp(220px, 30vw, 290px);
  }

  body.view-palettes .palette-board {
    grid-template-columns: 1fr;
  }

  body.view-palettes .palette-card {
    grid-template-columns: 1fr;
  }

  body.view-palettes .palette-meta {
    min-height: 84px;
  }

  body.view-palettes .palette-swatches {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    grid-auto-rows: clamp(160px, 24vw, 210px);
  }

  body.view-palettes .palette-swatch {
    min-height: 0;
  }

  body.view-palettes .palette-swatch:nth-child(5) {
    grid-column: 2 / 4;
  }
}

@media (max-width: 639px) {
  .wall {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-auto-rows: 44vw;
  }

  body.view-palettes .palette-board {
    grid-template-columns: 1fr;
  }

  .palette-card {
    grid-template-columns: 1fr;
  }

  body.view-palettes .palette-meta {
    min-height: 82px;
    padding: 0 14px;
    justify-content: center;
  }

  body.view-palettes .palette-name {
    font-size: clamp(22px, 6.4vw, 30px);
  }

  body.view-palettes .palette-swatches {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    grid-template-rows: repeat(2, 44vw);
    grid-auto-rows: auto;
    column-gap: 2px;
    row-gap: 2px;
  }

  body.view-palettes .palette-swatch:nth-child(1),
  body.view-palettes .palette-swatch:nth-child(2) {
    grid-row: 1;
    grid-column: span 3;
  }

  body.view-palettes .palette-swatch:nth-child(3),
  body.view-palettes .palette-swatch:nth-child(4),
  body.view-palettes .palette-swatch:nth-child(5) {
    grid-row: 2;
    grid-column: span 2;
  }

  body.view-palettes .palette-swatch:nth-child(1) {
    grid-column: 1 / 4;
  }

  body.view-palettes .palette-swatch:nth-child(2) {
    grid-column: 4 / 7;
  }

  body.view-palettes .palette-swatch:nth-child(3) {
    grid-column: 1 / 3;
  }

  body.view-palettes .palette-swatch:nth-child(4) {
    grid-column: 3 / 5;
  }

  body.view-palettes .palette-swatch:nth-child(5) {
    grid-column: 5 / 7;
  }

  body.view-palettes .palette-swatch {
    min-height: 0;
  }

  body.view-palettes .palette-swatch:hover,
  body.view-palettes .palette-swatch:focus-visible,
  body.view-palettes .palette-swatch.palette-flash {
    z-index: 0;
    box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.09);
  }

  body.view-palettes .palette-swatch:hover .palette-swatch-overlay,
  body.view-palettes .palette-swatch:focus-visible .palette-swatch-overlay {
    transform: none;
  }

  body.view-palettes .palette-color-name {
    font-size: clamp(24px, 7vw, 34px);
  }

  body.view-palettes .palette-role {
    font-size: 12px;
  }

  body.view-palettes .palette-hex {
    font-size: 13px;
  }

  body.view-palettes .palette-hint {
    display: none;
  }
}

@media (max-width: 420px) {
  .tile-name {
    font-size: clamp(18px, 8vw, 28px);
  }

  .tile-code {
    font-size: 11px;
  }
}