:root {
  --primary: #1E3A8A;
  --accent: #2563EB;
  --success: #16A34A;
  --warning: #CA8A04;
  --error: #DC2626;
  --bg: #F9FAFB;
  --card-bg: #FFFFFF;
  --border: #E5E7EB;
  --json-bg: #0F172A;
  --json-text: #E2E8F0;
  --text: #111827;
  --text-secondary: #6B7280;
}

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

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.app {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px;
}

/* ── Header ── */
.pg-header {
  text-align: center;
  padding: 32px 0 24px;
  border-bottom: 2px solid var(--primary);
  margin-bottom: 32px;
}
.pg-header h1 {
  font-size: 22px;
  color: var(--primary);
  margin-bottom: 4px;
}
.header-note {
  font-size: 13px;
  color: var(--success);
  font-weight: 500;
}

/* ── Features ── */
.features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}
.feature-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px 16px;
  text-align: center;
}
.feature-icon { font-size: 28px; margin-bottom: 8px; }
.feature-card h3 { font-size: 14px; color: var(--primary); margin-bottom: 6px; }
.feature-card p { font-size: 12px; color: var(--text-secondary); line-height: 1.5; }

@media (max-width: 900px) {
  .features { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 500px) {
  .features { grid-template-columns: 1fr; }
}

/* ── Generator ── */
.generator {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 32px;
}
@media (max-width: 900px) {
  .generator { grid-template-columns: 1fr; }
}

.section-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 16px;
}
.section-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}

/* ── Radio ── */
.radio-group { display: flex; flex-direction: column; gap: 10px; }
.radio-label {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 14px;
  cursor: pointer;
}
.radio-text { font-weight: 500; min-width: 80px; }
.help-text { font-size: 12px; color: var(--text-secondary); }

/* ── Thresholds ── */
.threshold-group { margin-bottom: 12px; }
.threshold-group label { display: block; font-size: 13px; color: var(--text-secondary); margin-bottom: 4px; }
.slider-row { display: flex; align-items: center; gap: 10px; }
.slider-row input[type="range"] { flex: 1; }
.slider-row input[type="number"] { width: 64px; padding: 4px 6px; border: 1px solid var(--border); border-radius: 6px; font-size: 14px; text-align: center; }

/* ── Domain Tags ── */
.domain-section { margin-bottom: 14px; }
.domain-section > label { display: block; font-size: 13px; color: var(--text-secondary); margin-bottom: 6px; }
.tag-container {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px;
  min-height: 42px;
  background: #fff;
}
.tag-list { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 4px; }
.tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  background: #EFF6FF;
  border: 1px solid #BFDBFE;
  border-radius: 6px;
  font-size: 13px;
}
.tag-invalid {
  background: #FEF2F2;
  border-color: #FECACA;
  color: var(--error);
}
.tag-remove {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 13px;
  color: var(--text-secondary);
  padding: 0 2px;
  line-height: 1;
}
.tag-remove:hover { color: var(--error); }
.tag-input {
  border: none;
  outline: none;
  font-size: 13px;
  width: 100%;
  padding: 4px 0;
}

/* ── Checkbox ── */
.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  margin-bottom: 8px;
  cursor: pointer;
}
.checkbox-label input[type="checkbox"] { width: 16px; height: 16px; }

/* ── Logging ── */
.logging-group { margin-bottom: 10px; }
.logging-group label { display: block; font-size: 13px; color: var(--text-secondary); margin-bottom: 4px; }
.logging-group input[type="number"] { width: 100px; padding: 4px 8px; border: 1px solid var(--border); border-radius: 6px; font-size: 14px; }

/* ── Output Panel ── */
.output-panel { position: sticky; top: 24px; align-self: start; }

.dashboard {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 16px;
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 12px;
  font-family: "SF Mono", "Cascadia Code", "Consolas", monospace;
}

.history-panel {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 16px;
  margin-bottom: 12px;
  font-size: 12px;
}
.history-entry {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 4px 0;
  border-bottom: 1px solid var(--border);
}
.history-entry:last-child { border-bottom: none; }
.history-meta { color: var(--text-secondary); font-family: monospace; }
.history-actions { display: flex; gap: 6px; }
.history-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2px 8px;
  font-size: 11px;
  cursor: pointer;
  color: var(--accent);
}
.history-btn:hover { background: #EFF6FF; }

.diff-panel {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 16px;
  margin-bottom: 12px;
  font-size: 12px;
  font-family: monospace;
}
.diff-add { color: var(--success); }
.diff-remove { color: var(--error); }
.diff-change { color: var(--warning); }

.json-display {
  background: var(--json-bg);
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 12px;
  overflow-x: auto;
}
.json-display pre {
  color: var(--json-text);
  font-family: "SF Mono", "Cascadia Code", "Consolas", monospace;
  font-size: 12px;
  line-height: 1.6;
  white-space: pre;
  margin: 0;
}

.warnings-panel { margin-bottom: 12px; }
.warning-badge, .error-badge, .valid-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 6px;
}
.valid-badge { background: var(--success); }
.warning-badge { background: var(--warning); }
.error-badge { background: var(--error); }
.warning-item, .error-item {
  font-size: 12px;
  padding: 2px 0;
}
.warning-item { color: var(--warning); }
.error-item { color: var(--error); }

/* ── Action Buttons ── */
.action-buttons { display: flex; flex-wrap: wrap; gap: 8px; }
.btn {
  padding: 8px 18px;
  border: none;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  color: #fff;
}
.btn-primary { background: var(--primary); }
.btn-primary:hover { background: #162E6E; }
.btn-accent { background: var(--accent); }
.btn-accent:hover { background: var(--primary); }
.btn:disabled { background: #9CA3AF; cursor: not-allowed; }

/* ── Guide ── */
.guide-section {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 32px;
}
.guide-section h2 { font-size: 15px; color: var(--primary); margin-bottom: 12px; }
.guide-content {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.8;
  white-space: pre-line;
}

/* ── FAQ ── */
.faq-section { margin-bottom: 32px; }
.faq-section h2 { font-size: 18px; color: var(--primary); margin-bottom: 16px; }
.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 20px;
  margin-bottom: 10px;
}
.faq-q { font-weight: 600; font-size: 14px; margin-bottom: 4px; }
.faq-a { font-size: 13px; color: var(--text-secondary); }

/* ── Toast / Warning ── */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--success);
  color: #fff;
  padding: 10px 24px;
  border-radius: 8px;
  font-size: 14px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  z-index: 1000;
}
.warning-bar {
  position: fixed;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  background: #FFFBEB;
  border: 1px solid #FDE68A;
  color: var(--warning);
  padding: 8px 20px;
  border-radius: 8px;
  font-size: 13px;
  z-index: 1000;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}