:root {
  color-scheme: light;
  --bg: #f6f7f5;
  --panel: #ffffff;
  --panel-soft: #fbfcfd;
  --text: #20242a;
  --muted: #66717f;
  --line: #d8dee4;
  --line-strong: #b7c0ca;
  --blue: #2563eb;
  --blue-dark: #1e4fb8;
  --green: #16875a;
  --red: #c2413d;
  --amber: #a15c07;
  --shadow: 0 18px 45px rgba(30, 41, 59, 0.09);
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--bg);
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.7), rgba(246, 247, 245, 0.94)),
    var(--bg);
  font-family: Inter, "Segoe UI", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
}

button,
input {
  font: inherit;
}

button {
  min-height: 38px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  cursor: pointer;
  transition:
    background-color 160ms ease,
    border-color 160ms ease,
    transform 120ms ease;
}

button:active {
  transform: translateY(1px);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.52;
  transform: none;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

.app-shell {
  width: min(1180px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 24px 0 32px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 14px 0 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-icon {
  width: 52px;
  height: 52px;
  object-fit: contain;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: 24px;
  line-height: 1.15;
  letter-spacing: 0;
}

.brand p,
.queue-head p,
.drop-copy p,
.preview-panel span,
.status-text,
.empty-state span,
.legal {
  color: var(--muted);
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  grid-template-rows: auto auto;
  gap: 16px;
}

.drop-panel,
.controls-panel,
.queue-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.drop-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  align-items: stretch;
  gap: 16px;
  padding: 16px;
}

.drop-zone {
  display: grid;
  min-height: 214px;
  place-items: center;
  border: 2px dashed var(--line-strong);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(37, 99, 235, 0.07), rgba(22, 135, 90, 0.08)),
    var(--panel-soft);
  text-align: center;
  outline: none;
}

.drop-zone.dragover,
.drop-zone:focus-visible {
  border-color: var(--blue);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.14);
}

.drop-copy {
  display: grid;
  gap: 10px;
  max-width: 500px;
  padding: 18px;
  justify-items: center;
}

.drop-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}

.drop-action-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-width: 164px;
  min-height: 38px;
  padding: 7px 18px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: #fff;
  color: var(--text);
  font-weight: 600;
}

.drop-action-button:hover {
  border-color: var(--blue);
  background: #f4f8ff;
}

.drop-action-icon {
  width: 18px;
  height: 18px;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.drop-symbol {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--blue);
  color: #fff;
  font-size: 0;
}

.drop-symbol::before,
.drop-symbol::after {
  position: absolute;
  content: "";
  width: 20px;
  height: 4px;
  border-radius: 999px;
  background: #fff;
}

.drop-symbol::after {
  transform: rotate(90deg);
}

.drop-copy h2,
.queue-head h2 {
  font-size: 20px;
  line-height: 1.2;
  letter-spacing: 0;
}

.preview-panel {
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 12px;
  min-height: 214px;
  min-width: 0;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-soft);
}

#preview-canvas {
  width: 220px;
  height: 220px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(45deg, #edf1f5 25%, transparent 25%),
    linear-gradient(-45deg, #edf1f5 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #edf1f5 75%),
    linear-gradient(-45deg, transparent 75%, #edf1f5 75%),
    #fff;
  background-position:
    0 0,
    0 8px,
    8px -8px,
    -8px 0;
  background-size: 16px 16px;
}

.preview-panel strong,
.preview-panel span {
  display: block;
  overflow-wrap: anywhere;
}

.preview-copy {
  display: grid;
  gap: 4px;
  width: min(100%, 220px);
  text-align: center;
}

.controls-panel {
  grid-column: 2;
  grid-row: 1 / span 2;
  align-self: start;
  display: grid;
  gap: 18px;
  padding: 16px;
}

.control-group {
  display: grid;
  gap: 10px;
}

.label {
  font-weight: 700;
}

.mode-row {
  display: grid;
  gap: 10px;
}

.mode-toggle {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  min-height: 38px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-soft);
}

.mode-button {
  min-height: 30px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  font-weight: 700;
}

.mode-button.active {
  background: var(--blue);
  color: #fff;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.22);
}

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

.preset-button {
  min-height: 34px;
  padding: 6px 9px;
  background: #fff;
  color: var(--text);
  font-size: 13px;
  font-weight: 700;
}

.preset-button:hover {
  border-color: var(--blue);
  background: #f4f8ff;
}

.size-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.size-option {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 38px;
  padding: 7px 9px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-soft);
  cursor: pointer;
  user-select: none;
}

.size-option.unsupported {
  cursor: not-allowed;
  opacity: 0.46;
  color: var(--muted);
  background: #f1f4f7;
}

.size-option.unsupported input,
.size-option.unsupported span {
  cursor: not-allowed;
}

.size-option input {
  width: 16px;
  height: 16px;
  accent-color: var(--blue);
}

.action-row {
  display: grid;
  gap: 10px;
}

.primary-button {
  color: #fff;
  border-color: var(--blue-dark);
  background: var(--blue);
  font-weight: 700;
}

.primary-button:hover {
  background: var(--blue-dark);
}

.secondary-button,
.row-button {
  background: #fff;
  color: var(--text);
}

.secondary-button:hover,
.row-button:hover {
  border-color: var(--blue);
  background: #f4f8ff;
}

.status-text {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

.queue-panel {
  grid-column: 1;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  gap: 12px;
  padding: 16px;
  min-width: 0;
}

.queue-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.queue-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  flex-wrap: wrap;
}

.queue-command-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-width: 180px;
  min-height: 44px;
  padding: 8px 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--text);
  font-weight: 500;
}

.queue-command-button svg {
  width: 18px;
  height: 18px;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.queue-command-button .clear-icon,
.queue-command-button.clear-mode .remove-icon {
  display: none;
}

.queue-command-button.clear-mode .clear-icon {
  display: block;
}

.queue-command-button:hover {
  border-color: var(--blue);
  background: #f4f8ff;
}

.queue-command-button:disabled {
  color: var(--muted);
  background: var(--panel);
  opacity: 0.58;
}

.header-check input,
.row-active {
  width: 16px;
  height: 16px;
  accent-color: var(--blue);
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
}

table {
  width: 100%;
  min-width: 840px;
  border-collapse: collapse;
  font-size: 14px;
}

th,
td {
  padding: 10px 9px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: middle;
}

th {
  background: #f2f5f8;
  color: #394452;
  font-size: 12px;
  font-weight: 700;
}

.header-check {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  white-space: nowrap;
}

.header-check input {
  width: 16px;
  height: 16px;
  accent-color: var(--blue);
}

td.center,
th.center {
  text-align: center;
}

tbody tr {
  background: #fff;
  cursor: pointer;
}

tbody tr:nth-child(even) {
  background: var(--panel-soft);
}

tbody tr.highlighted {
  outline: 2px solid rgba(37, 99, 235, 0.38);
  outline-offset: -2px;
}

tbody tr.disabled {
  color: var(--muted);
}

tbody tr:last-child td {
  border-bottom: 0;
}

.file-name {
  max-width: 260px;
  overflow-wrap: anywhere;
  font-weight: 700;
}

.sizes-cell {
  min-width: 112px;
  color: #395163;
}

.status-badge {
  display: inline-block;
  min-width: 76px;
  padding: 4px 7px;
  border-radius: 999px;
  background: #eef4ff;
  color: var(--blue-dark);
  text-align: center;
  font-size: 12px;
}

.status-badge.done {
  background: #e8f7ef;
  color: var(--green);
}

.status-badge.error {
  background: #fff0ef;
  color: var(--red);
}

.status-badge.skip {
  background: #fff7e8;
  color: var(--amber);
}

.row-button {
  min-width: 48px;
  min-height: 32px;
  padding: 0 9px;
}

.row-active,
.row-button {
  cursor: pointer;
}

.empty-state {
  display: grid;
  gap: 5px;
  place-items: center;
  min-height: 220px;
  border: 1px dashed var(--line-strong);
  border-radius: 8px;
  background: var(--panel-soft);
  text-align: center;
}

.empty-state.hidden,
.table-wrap.hidden {
  display: none;
}

.legal {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  padding: 18px 2px 0;
  font-size: 12px;
}

.legal a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 2px;
}

@media (max-width: 940px) {
  body {
    background:
      linear-gradient(180deg, rgba(255, 255, 255, 0.72), rgba(246, 247, 245, 0.95)),
      var(--bg);
  }

  .workspace {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
  }

  .controls-panel,
  .queue-panel {
    grid-column: auto;
    grid-row: auto;
  }

  .size-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 680px) {
  .app-shell {
    width: min(100vw - 20px, 1180px);
    padding-top: 12px;
  }

  .topbar,
  .queue-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .drop-panel {
    grid-template-columns: 1fr;
  }

  .preview-panel {
    grid-template-columns: 92px minmax(0, 1fr);
    align-items: center;
    min-height: 124px;
  }

  #preview-canvas {
    width: 92px;
    height: 92px;
  }

  .size-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg: #101419;
    --panel: #171d24;
    --panel-soft: #1d2530;
    --text: #eef3f8;
    --muted: #a9b5c4;
    --line: #2e3947;
    --line-strong: #4a5a6b;
    --blue: #5b8cff;
    --blue-dark: #3e6fe8;
    --green: #56c58d;
    --red: #ff7b72;
    --amber: #f3b65f;
    --shadow: 0 18px 45px rgba(0, 0, 0, 0.34);
  }

  body {
    background:
      linear-gradient(180deg, rgba(16, 20, 25, 0.86), rgba(16, 20, 25, 0.98)),
      var(--bg);
  }

  .drop-zone {
    background:
      linear-gradient(135deg, rgba(91, 140, 255, 0.12), rgba(86, 197, 141, 0.1)),
      var(--panel-soft);
  }

  .mode-toggle,
  .size-option,
  .empty-state,
  .preview-panel {
    background: var(--panel-soft);
  }

  .size-option.unsupported {
    background: #151b22;
    color: #6f7d8d;
  }

  .secondary-button,
  .row-button,
  .queue-command-button,
  .drop-action-button,
  .preset-button {
    background: #151b22;
    color: var(--text);
  }

  .secondary-button:hover,
  .row-button:hover,
  .queue-command-button:hover,
  .drop-action-button:hover,
  .preset-button:hover {
    background: #1f2a36;
  }

  .queue-command-button:disabled {
    background: #151b22;
    color: #7d8998;
  }

  th {
    background: #202a35;
    color: #d8e1ed;
  }

  tbody tr {
    background: #171d24;
  }

  tbody tr:nth-child(even) {
    background: #1b232d;
  }

  tbody tr.disabled {
    color: #8895a6;
  }

  #preview-canvas {
    background:
      linear-gradient(45deg, #25303c 25%, transparent 25%),
      linear-gradient(-45deg, #25303c 25%, transparent 25%),
      linear-gradient(45deg, transparent 75%, #25303c 75%),
      linear-gradient(-45deg, transparent 75%, #25303c 75%),
      #18202a;
    background-position:
      0 0,
      0 8px,
      8px -8px,
      -8px 0;
    background-size: 16px 16px;
  }

  .status-badge {
    background: #21365a;
    color: #b9d1ff;
  }

  .status-badge.done {
    background: #173829;
    color: var(--green);
  }

  .status-badge.error {
    background: #3e1f23;
    color: var(--red);
  }

  .status-badge.skip {
    background: #3a2b16;
    color: var(--amber);
  }

  .file-name,
  .sizes-cell {
    color: var(--text);
  }

  .legal a {
    color: #c8d8ff;
  }
}