:root {
  --bg: #0d1117;
  --panel: #161b22;
  --panel-2: #1c2230;
  --border: #2a3140;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #2dd4bf;
  --accent-2: #38bdf8;
  --danger: #f87171;
  --ok: #4ade80;
  --warn: #fbbf24;
  --radius: 14px;
  --radius-sm: 8px;
  --mono: "SF Mono", "JetBrains Mono", "Menlo", Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.page-shell {
  max-width: 860px;
  margin: 0 auto;
  padding: 32px 24px 48px;
}

.app-header {
  text-align: center;
  margin-bottom: 32px;
}

.app-header h1 {
  margin: 0 0 8px;
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.app-header .dot { color: var(--accent); }

.app-header .subtitle {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
}

.app-header .subtitle.tech {
  margin-top: 10px;
  font-size: 13px;
}

.app-header code {
  background: transparent;
  padding: 0;
  border-radius: 0;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
}

.control-panel {
  margin: 0 0 24px;
  padding: 0;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.field > span:first-child {
  font-size: 13px;
  color: var(--muted);
}

.field-modes { width: 100%; }

.mode-group {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.mode-group button {
  position: relative;
  isolation: isolate;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 16px;
  border-radius: 10px;
  cursor: pointer;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  min-width: 5.5rem;
  transition: border-color 0.15s, color 0.15s, box-shadow 0.15s;
  box-shadow: inset 0 0 0 0 var(--accent);
}

.mode-group button::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: var(--accent);
  opacity: 0;
  z-index: -1;
  transition: opacity 0.15s;
}

.mode-group button span {
  font-family: var(--sans);
  font-size: 11px;
  color: var(--muted);
  transition: color 0.15s;
}

.mode-group button:hover:not(.active) { border-color: var(--accent); }

.mode-group button:focus { outline: none; }

.mode-group button:focus-visible {
  box-shadow: inset 0 0 0 1px var(--accent), 0 0 0 2px rgba(45, 212, 191, 0.25);
}

.mode-group button.active {
  border-color: var(--accent);
  color: #0d1117;
  box-shadow: inset 0 0 0 1px var(--accent);
}

.mode-group button.active::before { opacity: 1; }

.mode-group button.active span { color: #0d1117; opacity: 0.72; }

.drop-zone {
  border: 1.5px dashed var(--border);
  border-radius: var(--radius);
  padding: 48px 24px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  margin-bottom: 24px;
  position: relative;
}

.drop-zone:hover,
.drop-zone.dragover {
  border-color: var(--accent);
  background: rgba(45, 212, 191, 0.04);
}

.drop-zone .plus {
  font-size: 36px;
  color: var(--accent);
  margin-bottom: 8px;
  font-weight: 200;
  line-height: 1;
}

.drop-zone strong {
  display: block;
  font-size: 15px;
  margin-bottom: 4px;
  font-weight: 500;
}

.drop-zone > span { font-size: 13px; color: var(--muted); }

.drop-zone input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
}

.result-table {
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  margin-bottom: 20px;
}

.result-table:has(.result-list:empty) {
  display: none;
  margin-bottom: 0;
}

.result-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.file-card {
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 10px 14px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px 12px;
  align-items: center;
}

.file-card:not(:last-child) {
  border-bottom: 1px solid var(--border);
}

.file-card.card-running {
  background: rgba(45, 212, 191, 0.04);
}

.file-info { display: flex; flex-direction: column; gap: 4px; min-width: 0; }

.file-name {
  font-weight: 500;
  font-size: 14px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.file-meta {
  font-size: 12px;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
  align-items: center;
}

.file-meta .mode-tag {
  font-family: var(--mono);
  color: var(--accent-2);
  font-size: 12px;
}

.file-meta .size-before { text-decoration: line-through; }

.file-meta .size-after { color: var(--ok); font-weight: 600; }

.file-meta .savings { color: var(--accent); font-weight: 600; }

.file-meta .err { color: var(--danger); }

.file-actions {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-shrink: 0;
}

.status-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
}

.status-skipped { background: transparent; color: var(--warn); border: 1px solid var(--border); }
.status-failed { background: transparent; color: var(--danger); border: 1px solid var(--border); }
.status-running { background: transparent; color: var(--accent-2); border: 1px solid var(--border); }

.btn {
  padding: 8px 16px;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s, border-color 0.15s, color 0.15s;
  white-space: nowrap;
}

.btn-sm { padding: 5px 10px; font-size: 12px; font-weight: 500; }

.btn-primary {
  background: var(--accent);
  color: #0d1117;
}

.btn-primary:hover:not(:disabled) { opacity: 0.85; }

.btn-primary:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}

.btn-outline:hover { border-color: var(--accent); color: var(--accent); }

.actions-bar {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

.actions-bar .count {
  font-size: 13px;
  color: var(--muted);
  margin-left: auto;
}

.foot {
  text-align: center;
  padding: 0 24px 32px;
  color: var(--muted);
  font-size: 12px;
}

.foot a { color: var(--accent-2); text-decoration: none; }
.foot a:hover { text-decoration: underline; }

@media (max-width: 600px) {
  .page-shell { padding: 20px 16px 40px; }

  .app-header h1 { font-size: 28px; }

  .mode-group button {
    flex: 1 1 calc(50% - 4px);
    min-width: calc(50% - 4px);
  }

  .drop-zone { padding: 36px 16px; }

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

  .file-actions {
    justify-content: flex-end;
    flex-wrap: wrap;
  }

  .actions-bar .count {
    width: 100%;
    margin-left: 0;
    order: 3;
  }

  .actions-bar .btn-primary { flex: 1; }
}