:root {
  color-scheme: dark;
  --bg-0: #0d1723;
  --bg-1: #13273a;
  --bg-2: #21415a;
  --panel: rgba(245, 248, 252, 0.94);
  --panel-strong: rgba(255, 255, 255, 0.98);
  --panel-border: rgba(22, 40, 59, 0.12);
  --ink-0: #0f2230;
  --ink-1: #345167;
  --ink-2: #5d7487;
  --accent: #ff9f43;
  --accent-strong: #ff7a1a;
  --mint: #2ac6b7;
  --sky: #5db7ff;
  --danger: #ef5f67;
  --success: #2fbf71;
  --shadow: 0 24px 56px rgba(8, 20, 34, 0.22);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --viewport-grad-a: #17273a;
  --viewport-grad-b: #314a67;
  --viewport-grad-c: #6cb4cf;
  font-family: "Avenir Next", "PingFang SC", "Hiragino Sans GB", "Helvetica Neue", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(93, 183, 255, 0.18), transparent 34%),
    linear-gradient(145deg, var(--bg-0), var(--bg-1) 50%, #112536);
  color: var(--ink-0);
}

body {
  overflow: hidden;
}

button,
input,
textarea,
select {
  font: inherit;
}

.app-shell {
  display: grid;
  grid-template-columns: minmax(340px, 390px) minmax(0, 1fr);
  gap: 18px;
  width: 100%;
  height: calc(100% - 54px);
  padding: 18px;
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: 0;
  overflow-y: auto;
  padding-right: 4px;
  zoom: var(--ui-zoom, 1);
}

.sidebar::-webkit-scrollbar {
  width: 10px;
}

.sidebar::-webkit-scrollbar-track {
  background: transparent;
}

.sidebar::-webkit-scrollbar-thumb {
  background: rgba(227, 237, 246, 0.3);
  border: 3px solid transparent;
  border-radius: 999px;
  background-clip: content-box;
}

.panel {
  background: linear-gradient(180deg, var(--panel-strong), var(--panel));
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
  padding: 18px 18px 20px;
}

.palette-panel {
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.eyebrow,
.section-kicker,
.editor-eyebrow {
  margin: 0;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mint);
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 14px;
}

.section-head h2 {
  margin: 2px 0 0;
  font-size: 1.05rem;
}

.section-head-compact {
  margin-bottom: 10px;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px;
  border-radius: 999px;
  background: rgba(6, 16, 26, 0.32);
  border: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(10px);
}

.top-left-controls {
  position: absolute;
  top: 18px;
  left: 18px;
  display: flex;
  gap: 10px;
  z-index: 6;
  zoom: var(--ui-zoom, 1);
}

.zoom-controls {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(6, 16, 26, 0.32);
  border: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(10px);
  color: white;
}

.zoom-button {
  background: transparent;
  color: rgba(255, 255, 255, 0.72);
  border: none;
  cursor: pointer;
  font-weight: 700;
  font-size: 1.1rem;
  line-height: 1;
  padding: 0 4px;
  transition: color 160ms ease;
}

.zoom-button:hover {
  color: white;
}

.zoom-value {
  font-size: 0.85rem;
  font-weight: 700;
  min-width: 42px;
  text-align: center;
}

.lang-button,
.toolbar-button,
.button,
.mini-button,
.palette-cell {
  border: 0;
  cursor: pointer;
  transition:
    transform 160ms ease,
    box-shadow 160ms ease,
    background 160ms ease,
    opacity 160ms ease,
    border-color 160ms ease;
}

.lang-button {
  min-width: 58px;
  padding: 8px 14px;
  color: rgba(255, 255, 255, 0.72);
  background: transparent;
  font-weight: 700;
  border-radius: 999px;
}

.lang-button.is-active,
.toolbar-button.is-active {
  color: white;
  background: linear-gradient(135deg, var(--sky), var(--mint));
  box-shadow: 0 10px 18px rgba(42, 198, 183, 0.3);
}

.button {
  width: 100%;
  padding: 13px 18px;
  font-weight: 700;
  border-radius: 999px;
}

.button:hover,
.toolbar-button:hover,
.lang-button:hover,
.mini-button:hover,
.palette-cell:hover {
  transform: translateY(-1px);
}

.button:disabled,
.toolbar-button:disabled,
.lang-button:disabled,
.mini-button:disabled {
  cursor: not-allowed;
  opacity: 0.54;
  transform: none;
  box-shadow: none;
}

.button-primary {
  color: white;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  box-shadow: 0 16px 24px rgba(255, 122, 26, 0.26);
}

.button-accent {
  color: white;
  background: linear-gradient(135deg, var(--mint), #1ba7a8);
  box-shadow: 0 16px 24px rgba(42, 198, 183, 0.24);
}

.button-secondary {
  color: var(--ink-0);
  background: rgba(15, 34, 48, 0.08);
}

.field-label {
  margin: 14px 0 10px;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--ink-1);
}

.field-label:first-of-type {
  margin-top: 0;
}

.toggle-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.toggle-option {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 88px;
  padding: 12px 16px;
  border-radius: 999px;
  border: 1px solid rgba(15, 34, 48, 0.12);
  background: rgba(15, 34, 48, 0.04);
  color: var(--ink-1);
  cursor: pointer;
  font-weight: 700;
  transition:
    transform 160ms ease,
    background 160ms ease,
    border-color 160ms ease,
    box-shadow 160ms ease,
    color 160ms ease;
}

.toggle-option:hover {
  transform: translateY(-1px);
}

.toggle-option.is-selected {
  color: white;
  border-color: transparent;
  background: linear-gradient(135deg, var(--sky), var(--mint));
  box-shadow: 0 14px 24px rgba(42, 198, 183, 0.24);
}

.toggle-option input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.toggle-option input:disabled {
  cursor: not-allowed;
}

.select-field {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid rgba(15, 34, 48, 0.12);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.94);
  color: var(--ink-0);
  outline: none;
}

.helper-text,
.helper-chip {
  margin: 10px 0 0;
  color: var(--ink-1);
  line-height: 1.45;
}

.helper-chip {
  display: inline-flex;
  align-items: center;
  padding: 7px 11px;
  border-radius: 999px;
  background: rgba(93, 183, 255, 0.12);
  font-size: 0.85rem;
}

.hidden-input {
  display: none;
}

.palette-grid-frame {
  min-height: 0;
  max-height: 460px;
  overflow: auto;
  padding: 14px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(15, 34, 48, 0.08);
  background:
    linear-gradient(45deg, rgba(15, 34, 48, 0.06) 25%, transparent 25%, transparent 75%, rgba(15, 34, 48, 0.06) 75%),
    linear-gradient(45deg, rgba(15, 34, 48, 0.06) 25%, transparent 25%, transparent 75%, rgba(15, 34, 48, 0.06) 75%),
    rgba(255, 255, 255, 0.86);
  background-position: 0 0, 12px 12px, 0 0;
  background-size: 24px 24px, 24px 24px, auto;
}

.palette-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(54px, 1fr));
  gap: 10px;
}

.palette-cell {
  position: relative;
  min-width: 0;
  aspect-ratio: 1 / 1;
  padding: 8px;
  border-radius: 16px;
  border: 2px solid transparent;
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.42),
    0 10px 18px rgba(13, 23, 35, 0.12);
}

.palette-cell::after {
  content: "";
  position: absolute;
  inset: -5px;
  border-radius: 20px;
  border: 2px solid transparent;
  pointer-events: none;
  transition: border-color 160ms ease, box-shadow 160ms ease;
}

.palette-cell.is-hovered::after {
  border-color: transparent;
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.9);
}

.palette-cell.is-selected {
  border-color: white;
  box-shadow:
    inset 0 0 0 2px rgba(0, 0, 0, 0.4),
    0 0 0 4px white,
    0 14px 24px rgba(93, 183, 255, 0.3);
}

.palette-cell.is-limited {
  opacity: 0.62;
}

.palette-cell-index,
.palette-cell-state {
  position: absolute;
  left: 8px;
  right: 8px;
  color: white;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.35);
  pointer-events: none;
}

.palette-cell-index {
  top: 8px;
  font-size: 0.76rem;
  font-weight: 800;
}

.palette-cell-state {
  bottom: 8px;
  font-size: 0.62rem;
  font-weight: 700;
  line-height: 1.15;
  opacity: 0.92;
}

.info-grid {
  display: grid;
  gap: 8px;
}

.info-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.08);
}

.info-label {
  color: rgba(255, 255, 255, 0.74);
  font-size: 0.82rem;
}

.info-value {
  text-align: right;
  font-weight: 700;
  color: white;
  font-size: 0.82rem;
}



.badge,
.pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  font-weight: 800;
}

.badge {
  min-width: 34px;
  height: 34px;
  padding: 0 12px;
  background: rgba(15, 34, 48, 0.08);
  color: var(--ink-0);
}

.pill {
  padding: 5px 10px;
  font-size: 0.74rem;
}

.pill-neutral {
  color: rgba(255, 255, 255, 0.72);
  background: rgba(255, 255, 255, 0.12);
}

.pill-success {
  color: #e7fff1;
  background: rgba(47, 191, 113, 0.22);
}

.empty-card {
  padding: 18px;
  border: 1px dashed rgba(15, 34, 48, 0.18);
  border-radius: var(--radius-lg);
  color: var(--ink-1);
  text-align: center;
  line-height: 1.6;
  grid-column: 1 / -1;
}

.mini-button {
  min-width: 74px;
  padding: 10px 12px;
  border-radius: 12px;
  background: rgba(239, 95, 103, 0.16);
  color: #ffdde0;
  font-weight: 700;
}

.swatch {
  width: 22px;
  height: 22px;
  border-radius: 8px;
  border: 2px solid rgba(255, 255, 255, 0.32);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.3);
}

.swatch-large {
  width: 28px;
  height: 28px;
  border-radius: 10px;
}

.color-picker {
  width: 48px;
  height: 42px;
  padding: 0;
  border: 0;
  border-radius: 12px;
  background: transparent;
}

.hex-input {
  flex: 1;
  min-width: 0;
  padding: 11px 12px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(10, 22, 34, 0.54);
  color: white;
  text-transform: uppercase;
}

.viewport-shell {
  position: relative;
  min-width: 0;
  border-radius: 34px;
  overflow: hidden;
  box-shadow: 0 28px 70px rgba(4, 10, 20, 0.32);
  background: linear-gradient(180deg, rgba(11, 21, 34, 0.86), rgba(16, 32, 48, 0.96));
}

.viewport-gradient {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at top right, rgba(255, 201, 125, 0.22), transparent 28%),
    radial-gradient(circle at 20% 20%, rgba(93, 183, 255, 0.18), transparent 30%),
    linear-gradient(160deg, var(--viewport-grad-a), var(--viewport-grad-b) 60%, var(--viewport-grad-c));
}

.viewer-host,
.viewer-host canvas,
.viewport-empty,
.viewport-overlay {
  position: absolute;
  inset: 0;
}

.viewer-host {
  z-index: 1;
}

.viewer-host canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.viewer-toolbar {
  position: absolute;
  top: 18px;
  right: 18px;
  display: flex;
  gap: 10px;
  z-index: 5;
  zoom: var(--ui-zoom, 1);
}

.toolbar-button {
  padding: 11px 15px;
  color: white;
  background: rgba(6, 16, 26, 0.36);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  backdrop-filter: blur(10px);
}

.info-overlay,
.color-editor-panel {
  position: absolute;
  z-index: 5;
  border: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(16px);
  zoom: var(--ui-zoom, 1);
}

.info-overlay {
  right: 18px;
  bottom: 18px;
  width: min(290px, calc(100% - 36px));
  padding: 14px;
  border-radius: 22px;
  background: rgba(8, 18, 29, 0.54);
  color: white;
}

.color-editor-panel {
  left: 18px;
  bottom: 18px;
  width: min(360px, calc(100% - 36px));
  padding: 16px;
  border-radius: 24px;
  background: rgba(6, 16, 26, 0.72);
  color: white;
  box-shadow: 0 22px 46px rgba(2, 9, 17, 0.34);
}

.color-editor-panel.is-hidden {
  display: none;
}

.editor-header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.editor-header strong,
.editor-header span {
  display: block;
}

.editor-header strong {
  margin: 4px 0;
  font-size: 1rem;
}

.editor-header span {
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.84rem;
}

.editor-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.editor-row + .editor-row {
  margin-top: 12px;
}

.editor-row-secondary {
  padding-top: 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.editor-label {
  flex: 0 0 82px;
  color: rgba(255, 255, 255, 0.76);
  font-size: 0.86rem;
  font-weight: 700;
}

.editor-control,
.editor-original {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
  min-width: 0;
}

.editor-original-hex {
  flex: 1;
  min-width: 0;
  font-weight: 700;
}

.viewport-empty {
  z-index: 2;
  display: grid;
  place-items: center;
  text-align: center;
  color: rgba(255, 255, 255, 0.9);
  pointer-events: none;
}

.viewport-empty h2 {
  margin: 0 0 10px;
  font-size: 2rem;
}

.viewport-empty p {
  margin: 0;
  max-width: 520px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.74);
}

.viewport-empty.is-hidden {
  opacity: 0;
  visibility: hidden;
}

.viewport-overlay {
  z-index: 4;
  display: grid;
  place-items: center;
  background: rgba(10, 21, 33, 0.46);
  backdrop-filter: blur(6px);
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transition: opacity 140ms ease, visibility 140ms ease;
}

.viewport-overlay.is-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.overlay-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 28px 34px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.1);
  color: white;
  text-align: center;
}

.status-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  height: 54px;
  padding: 0 20px;
  background: rgba(7, 15, 24, 0.84);
  color: rgba(255, 255, 255, 0.84);
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  zoom: var(--ui-zoom, 1);
}

.status-bar.is-busy::before {
  content: "";
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.26);
  border-top-color: white;
  animation: spin 0.9s linear infinite;
}

.toast-stack {
  position: fixed;
  right: 20px;
  bottom: 72px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 20;
  zoom: var(--ui-zoom, 1);
}

.toast {
  min-width: 260px;
  max-width: 420px;
  padding: 13px 16px;
  border-radius: 18px;
  color: white;
  box-shadow: 0 20px 36px rgba(8, 19, 31, 0.3);
  animation: toast-in 180ms ease;
}

.toast-info {
  background: linear-gradient(135deg, #1b3448, #305877);
}

.toast-success {
  background: linear-gradient(135deg, #1f6b4b, #2fbf71);
}

.toast-warning {
  background: linear-gradient(135deg, #8f5a15, #da8b22);
}

.toast-error {
  background: linear-gradient(135deg, #8b2f40, #c84d5a);
}

.drop-target.is-active {
  outline: 2px dashed rgba(42, 198, 183, 0.4);
  outline-offset: 4px;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1080px) {
  body {
    overflow: auto;
  }

  .app-shell {
    grid-template-columns: 1fr;
    height: auto;
    min-height: calc(100% - 54px);
  }

  .sidebar {
    max-height: none;
    overflow: visible;
  }

  .viewport-shell {
    min-height: 65vh;
  }

  .viewer-toolbar {
    top: 76px;
    left: 18px;
    right: auto;
    flex-wrap: wrap;
  }

  .info-overlay,
  .color-editor-panel {
    width: calc(100% - 36px);
  }

  .info-overlay {
    bottom: 18px;
  }

  .color-editor-panel {
    left: 18px;
    right: 18px;
    bottom: 190px;
  }
}

.version-stamp {
  position: absolute;
  right: 18px;
  bottom: 18px;
  z-index: 100;
  color: rgba(255, 255, 255, 0.4);
  font-size: 0.8rem;
  font-weight: 700;
  pointer-events: none;
}