:root {
  --bg-primary: #0f0f1a;
  --bg-secondary: #161625;
  --bg-card: rgba(25, 25, 45, 0.7);
  --bg-input: rgba(15, 15, 30, 0.6);
  --text-primary: #e8e8f0;
  --text-secondary: #9a9ab5;
  --text-muted: #6a6a85;
  --text-placeholder: #4a4a65;
  --accent-blue: #4f8fff;
  --accent-blue-glow: rgba(79, 143, 255, 0.25);
  --accent-purple: #8b5cf6;
  --accent-purple-glow: rgba(139, 92, 246, 0.25);
  --accent-green: #34d399;
  --accent-green-glow: rgba(52, 211, 153, 0.2);
  --accent-orange: #f59e0b;
  --accent-red: #ef4444;
  --gradient-primary: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
  --gradient-header: linear-gradient(135deg, #1a1a3e 0%, #0f0f2e 100%);
  --border-color: rgba(255, 255, 255, 0.06);
  --border-active: rgba(79, 143, 255, 0.3);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.4);
  --shadow-glow-blue: 0 0 20px var(--accent-blue-glow);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed; inset: 0;
  background:
    radial-gradient(ellipse 600px 400px at 20% 20%, rgba(79,143,255,0.06) 0%, transparent 70%),
    radial-gradient(ellipse 500px 350px at 80% 80%, rgba(139,92,246,0.05) 0%, transparent 70%);
  pointer-events: none; z-index: 0;
}

.header {
  position: relative;
  background: var(--gradient-header);
  border-bottom: 1px solid var(--border-color);
  padding: 24px 0; z-index: 1;
}
.header-inner { max-width: 1400px; margin: 0 auto; padding: 0 32px; text-align: center; }
.logo { display: flex; align-items: center; justify-content: center; gap: 12px; margin-bottom: 8px; }
.logo-icon { font-size: 32px; filter: drop-shadow(0 0 8px rgba(79,143,255,0.4)); }
.logo h1 {
  font-size: 28px; font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.tagline { color: var(--text-secondary); font-size: 14px; }

.main { position: relative; z-index: 1; max-width: 1400px; margin: 0 auto; padding: 32px 32px 48px; }

.step-section { margin-bottom: 16px; }
.step-header { margin-bottom: 20px; }
.step-badge {
  display: inline-block; padding: 4px 14px; border-radius: 20px;
  font-size: 12px; font-weight: 600; letter-spacing: 0.5px; text-transform: uppercase; margin-bottom: 10px;
}
#step1 .step-badge { background: rgba(79,143,255,0.15); color: var(--accent-blue); border: 1px solid rgba(79,143,255,0.2); }
#step2 .step-badge { background: rgba(52,211,153,0.15); color: var(--accent-green); border: 1px solid rgba(52,211,153,0.2); }
.step-header h2 { font-size: 22px; font-weight: 600; margin-bottom: 6px; }
.step-desc { color: var(--text-secondary); font-size: 14px; }

.panels { display: grid; grid-template-columns: 1fr auto 1fr; gap: 0; align-items: stretch; }
.panel {
  background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius-lg);
  backdrop-filter: blur(12px); overflow: hidden; display: flex; flex-direction: column;
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}
.panel:hover { border-color: var(--border-active); }
.panel:focus-within { border-color: var(--accent-blue); box-shadow: var(--shadow-glow-blue); }

.panel-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 18px; border-bottom: 1px solid var(--border-color); background: rgba(255,255,255,0.02);
}
.panel-label { font-size: 13px; font-weight: 600; color: var(--text-secondary); }
.panel-actions { display: flex; gap: 6px; }

textarea {
  flex: 1; width: 100%; min-height: 280px; padding: 16px 18px; border: none;
  background: transparent; color: var(--text-primary);
  font-family: var(--font-mono); font-size: 13px; line-height: 1.7; resize: vertical; outline: none;
}
textarea::placeholder { color: var(--text-placeholder); font-family: var(--font-sans); font-size: 13px; line-height: 1.8; }
textarea[readonly] { cursor: default; }

.arrow-divider { display: flex; align-items: center; justify-content: center; padding: 0 12px; }

.btn {
  display: inline-flex; align-items: center; gap: 6px; border: none; border-radius: var(--radius-sm);
  font-family: var(--font-sans); font-weight: 500; cursor: pointer;
  transition: all var(--transition-fast); white-space: nowrap; user-select: none;
}
.btn:active { transform: scale(0.96); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; transform: none; }
.btn-sm { padding: 6px 12px; font-size: 12px; }
.btn-ghost { background: transparent; color: var(--text-secondary); border: 1px solid transparent; }
.btn-ghost:hover:not(:disabled) { background: rgba(255,255,255,0.06); color: var(--text-primary); border-color: var(--border-color); }
.btn-accent { background: rgba(79,143,255,0.15); color: var(--accent-blue); border: 1px solid rgba(79,143,255,0.2); }
.btn-accent:hover:not(:disabled) { background: rgba(79,143,255,0.25); box-shadow: 0 0 12px var(--accent-blue-glow); }

.btn-primary {
  padding: 14px 24px; font-size: 15px; font-weight: 600; border-radius: var(--radius-md);
  color: #fff; position: relative; overflow: hidden;
}
.btn-redact { background: var(--gradient-primary); box-shadow: var(--shadow-glow-blue); }
.btn-redact:hover:not(:disabled) { box-shadow: 0 0 30px var(--accent-blue-glow); transform: scale(1.03); }
.btn-restore { background: linear-gradient(135deg, var(--accent-green), var(--accent-blue)); box-shadow: 0 0 20px var(--accent-green-glow); }
.btn-restore:hover:not(:disabled) { box-shadow: 0 0 30px var(--accent-green-glow); transform: scale(1.03); }
.btn-primary .arrow { margin-left: 4px; transition: transform var(--transition-fast); }
.btn-primary:hover:not(:disabled) .arrow { transform: translateX(3px); }
.btn-icon { font-size: 14px; }

.stats-bar {
  display: flex; align-items: center; justify-content: center; gap: 32px;
  padding: 16px 24px; margin-bottom: 32px; background: var(--bg-card);
  border: 1px solid var(--border-color); border-radius: var(--radius-md); backdrop-filter: blur(12px); flex-wrap: wrap;
}
.stat-item { display: flex; align-items: center; gap: 8px; font-size: 14px; }
.stat-icon { font-size: 16px; }
.stat-value {
  font-weight: 700; font-size: 18px;
  background: var(--gradient-primary); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.stat-label { color: var(--text-secondary); font-size: 13px; }
.stat-actions { display: flex; gap: 8px; margin-left: auto; }

.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.6); backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center; z-index: 100;
  opacity: 0; visibility: hidden; transition: all var(--transition-normal);
}
.modal-overlay.active { opacity: 1; visibility: visible; }
.modal {
  background: var(--bg-secondary); border: 1px solid var(--border-color); border-radius: var(--radius-xl);
  width: 90%; max-width: 700px; max-height: 80vh; overflow: hidden;
  display: flex; flex-direction: column; box-shadow: var(--shadow-lg);
  transform: translateY(20px) scale(0.97); transition: transform var(--transition-normal);
}
.modal-overlay.active .modal { transform: translateY(0) scale(1); }
.modal-header { display: flex; align-items: center; justify-content: space-between; padding: 20px 24px; border-bottom: 1px solid var(--border-color); }
.modal-header h3 { font-size: 18px; font-weight: 600; }
.modal-close { font-size: 18px; width: 32px; height: 32px; display: flex; align-items: center; justify-content: center; border-radius: 50%; padding: 0; }
.modal-body { padding: 20px 24px; overflow-y: auto; flex: 1; }

.mapping-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.mapping-table th {
  text-align: left; padding: 10px 14px; color: var(--text-secondary);
  font-weight: 600; font-size: 12px; letter-spacing: 0.5px; text-transform: uppercase;
  border-bottom: 1px solid var(--border-color); background: rgba(255,255,255,0.02);
}
.mapping-table td { padding: 10px 14px; border-bottom: 1px solid rgba(255,255,255,0.03); font-family: var(--font-mono); word-break: break-all; }
.mapping-table tr:hover td { background: rgba(79,143,255,0.05); }
.mapping-table .placeholder-cell { color: var(--accent-blue); font-weight: 500; }
.mapping-table .value-cell { color: var(--accent-orange); max-width: 260px; overflow: hidden; text-overflow: ellipsis; }
.mapping-table .field-cell { color: var(--text-secondary); font-family: var(--font-sans); font-size: 12px; }
.empty-state { text-align: center; color: var(--text-muted); padding: 40px 0; font-size: 14px; }

.toast-container { position: fixed; bottom: 24px; right: 24px; z-index: 200; display: flex; flex-direction: column; gap: 8px; }
.toast {
  padding: 12px 20px; border-radius: var(--radius-sm); font-size: 13px; font-weight: 500;
  color: #fff; box-shadow: var(--shadow-md); animation: toastIn 0.3s ease, toastOut 0.3s ease 2.5s forwards; max-width: 360px;
}
.toast-success { background: linear-gradient(135deg, rgba(52,211,153,0.9), rgba(16,185,129,0.9)); border: 1px solid rgba(52,211,153,0.3); }
.toast-info { background: linear-gradient(135deg, rgba(79,143,255,0.9), rgba(59,130,246,0.9)); border: 1px solid rgba(79,143,255,0.3); }
.toast-warning { background: linear-gradient(135deg, rgba(245,158,11,0.9), rgba(217,119,6,0.9)); border: 1px solid rgba(245,158,11,0.3); }
.toast-error { background: linear-gradient(135deg, rgba(239,68,68,0.9), rgba(220,38,38,0.9)); border: 1px solid rgba(239,68,68,0.3); }

@keyframes toastIn { from { opacity: 0; transform: translateY(12px) scale(0.95); } to { opacity: 1; transform: translateY(0) scale(1); } }
@keyframes toastOut { to { opacity: 0; transform: translateY(-8px) scale(0.95); } }

.footer { position: relative; z-index: 1; text-align: center; padding: 24px 32px; color: var(--text-muted); font-size: 13px; border-top: 1px solid var(--border-color); }

@media (max-width: 900px) {
  .panels { grid-template-columns: 1fr; gap: 12px; }
  .arrow-divider { padding: 8px 0; }
  .btn-primary { width: 100%; justify-content: center; }
  .stats-bar { flex-direction: column; gap: 12px; text-align: center; }
  .stat-actions { margin-left: 0; justify-content: center; }
  .main { padding: 20px 16px 40px; }
  .header-inner { padding: 0 16px; }
}

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.2); }
::selection { background: rgba(79,143,255,0.3); color: #fff; }