:root {
  --bg: #0f1117;
  --panel: #181b24;
  --panel-2: #1f2330;
  --border: #2a2f3d;
  --text: #e4e7ef;
  --text-dim: #8b92a5;
  --accent: #4f8cff;
  --accent-hover: #6a9eff;
  --green: #3dd68c;
  --amber: #f5a623;
  --red: #ef5b5b;
  --radius: 8px;
  --mono: "SF Mono", "Fira Code", "Cascadia Code", Consolas, monospace;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

#topbar {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 10px 24px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.brand { font-size: 15px; font-weight: 600; white-space: nowrap; }

.progress-wrap { display: flex; align-items: center; gap: 12px; flex: 1; }
#progressText { font-size: 13px; color: var(--text-dim); font-family: var(--mono); white-space: nowrap; }

.progress-bar {
  flex: 1;
  max-width: 300px;
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  overflow: hidden;
}
#progressFill {
  height: 100%;
  background: var(--green);
  width: 0%;
  transition: width 0.2s;
}

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

#filterSelect, button {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 6px 12px;
  font-size: 13px;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
#filterSelect { padding: 6px 8px; }

button:hover { border-color: var(--accent); }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
button.primary:hover { background: var(--accent-hover); }
button.danger-ghost { color: var(--red); }
button.danger-ghost:hover { border-color: var(--red); background: rgba(239,91,91,0.1); }

#main {
  display: grid;
  grid-template-columns: 1fr 480px;
  gap: 20px;
  padding: 20px 24px;
  flex: 1;
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
}

.image-panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.image-counter {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--text-dim);
}

#reviewImage {
  max-width: 100%;
  max-height: 70vh;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  image-rendering: pixelated;
}

.image-meta { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; }
#actionClassTag, #sampleIdTag {
  font-family: var(--mono);
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 4px;
  background: var(--panel-2);
  color: var(--text-dim);
}
#actionClassTag.action { background: rgba(61,214,140,0.15); color: var(--green); }

.form-panel { display: flex; flex-direction: column; gap: 16px; }

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
}

.card-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-dim);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.badge-suggestion {
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 3px;
  background: rgba(245,166,35,0.15);
  color: var(--amber);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.prelabel-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px 16px;
  font-size: 13px;
}
.prelabel-grid .pl-field { display: flex; flex-direction: column; }
.prelabel-grid .pl-label { font-size: 11px; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.3px; }
.prelabel-grid .pl-value { font-family: var(--mono); color: var(--text); }
.prelabel-grid .pl-value.fullrow { grid-column: 1 / -1; }

.prelabel-reasoning {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-dim);
  font-style: italic;
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
}
.form-row > label {
  font-size: 11px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-row.primary-question { margin-bottom: 20px; padding-bottom: 16px; border-bottom: 1px solid var(--border); }
.form-row.primary-question > label { font-size: 14px; font-weight: 600; color: var(--text); text-transform: none; letter-spacing: 0; }
.btn-group-large button { padding: 14px 16px !important; font-size: 15px !important; font-weight: 600 !important; }
.btn-wrap button { min-width: 70px !important; }

.btn-group { display: flex; gap: 6px; flex-wrap: wrap; }
.btn-group button {
  flex: 1;
  min-width: 60px;
  padding: 6px 10px;
  font-size: 12px;
  border-radius: 6px;
}
.btn-group button.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.conditional-section {
  animation: fadeIn 0.2s ease;
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.mode-toggle {
  display: flex;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.mode-btn {
  border: none;
  border-radius: 0;
  padding: 5px 12px;
  font-size: 12px;
  background: var(--panel-2);
  color: var(--text-dim);
}
.mode-btn.active {
  background: var(--accent);
  color: #fff;
}

.reveal-btn {
  background: transparent;
  border: 1px dashed var(--border);
  color: var(--text-dim);
  padding: 6px 14px;
  font-size: 12px;
  border-radius: var(--radius);
  margin-bottom: 4px;
}
.reveal-btn:hover {
  border-color: var(--amber);
  color: var(--amber);
}

.nav-row { display: flex; gap: 8px; }
.nav-row button { flex: 1; padding: 10px; font-size: 14px; }
.confirm-btn {
  flex: 0 0 auto !important;
  min-width: 100px;
  padding: 10px 20px !important;
  background: var(--panel-2);
  border-color: var(--green);
  color: var(--green);
}
.confirm-btn:hover { background: rgba(61,214,140,0.15); }
.confirm-btn.confirmed {
  background: var(--green);
  color: #000;
  border-color: var(--green);
}

select, input[type="text"], textarea {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 10px;
  font-size: 13px;
  font-family: inherit;
  width: 100%;
}
textarea { resize: vertical; font-family: var(--mono); font-size: 12px; }
select:focus, input:focus, textarea:focus { outline: none; border-color: var(--accent); }

.nav-row { display: flex; gap: 8px; }

.modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
}
.modal.hidden { display: none; }
.modal-content {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
  max-width: 460px;
  width: 90%;
}
.modal-content h2 { font-size: 18px; margin-bottom: 8px; }
.modal-content p { font-size: 13px; color: var(--text-dim); margin-bottom: 20px; }
.modal-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.export-stats { margin-top: 16px; font-size: 12px; font-family: var(--mono); color: var(--text-dim); }

.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--panel);
  border: 1px solid var(--accent);
  color: var(--text);
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 13px;
  z-index: 300;
  box-shadow: 0 4px 20px rgba(0,0,0,0.4);
}
.toast.hidden { display: none; }

@media (max-width: 900px) {
  #main { grid-template-columns: 1fr; }
}