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

:root {
  --bg-primary: #0f0f0f;
  --bg-secondary: #1a1a1a;
  --bg-card: #222;
  --bg-input: #2a2a2a;
  --border: #333;
  --text-primary: #e0e0e0;
  --text-secondary: #888;
  --accent: #4CAF50;
  --accent-hover: #45a049;
  --danger: #f44336;
  --danger-hover: #d32f2f;
  --price-color: #4CAF50;
  --state-color: #2196F3;
  --version-color: #9C27B0;
  --quantity-color: #FF9800;
  --title-color: #00BCD4;
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
}

header {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
}

header h1 {
  font-size: 1.3em;
  font-weight: 600;
  color: var(--accent);
}

.stats-bar {
  display: flex;
  gap: 20px;
  font-size: 0.85em;
  color: var(--text-secondary);
  align-items: center;
}

.stats-bar span {
  display: flex;
  align-items: center;
  gap: 5px;
}

.stats-bar .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.dot.green { background: var(--accent); }
.dot.red { background: var(--danger); }
.dot.yellow { background: var(--quantity-color); }

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 20px;
}

.tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0;
}

.tab {
  padding: 10px 20px;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 0.95em;
  border-bottom: 2px solid transparent;
  transition: all 0.2s;
}

.tab:hover { color: var(--text-primary); }

.tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.tab-content { display: none; }
.tab-content.active { display: block; }

/* Group Bar */
.group-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
}

.group-tabs {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  flex: 1;
}

.group-tab {
  padding: 6px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 0.85em;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  gap: 6px;
}

.group-tab:hover { border-color: var(--text-secondary); color: var(--text-primary); }

.group-tab.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.group-tab .group-count {
  font-size: 0.8em;
  opacity: 0.7;
}

.group-tab .group-actions {
  display: none;
  gap: 2px;
  margin-left: 4px;
}

.group-tab:hover .group-actions { display: flex; }
.group-tab.active .group-actions { display: flex; }

.group-action-btn {
  background: none;
  border: none;
  color: inherit;
  cursor: pointer;
  font-size: 0.8em;
  padding: 0 2px;
  opacity: 0.6;
  line-height: 1;
}

.group-action-btn:hover { opacity: 1; }

/* Move offer to group dropdown */
.move-group-select {
  background: var(--bg-input);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 3px 6px;
  border-radius: 4px;
  font-size: 0.75em;
  cursor: pointer;
  outline: none;
}

/* Add Offer Form */
.add-form {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
}

.add-form input, .add-form select {
  background: var(--bg-input);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 10px 14px;
  border-radius: 6px;
  font-size: 0.95em;
  outline: none;
  transition: border-color 0.2s;
}

.add-form input:focus {
  border-color: var(--accent);
}

.add-form input[name="offer_id"] { flex: 1; min-width: 200px; }
.add-form input[name="label"] { width: 200px; }

.btn {
  padding: 10px 18px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.9em;
  font-weight: 500;
  transition: all 0.2s;
  white-space: nowrap;
}

.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: var(--danger-hover); }
.btn-sm { padding: 5px 12px; font-size: 0.8em; }
.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}
.btn-ghost:hover { color: var(--text-primary); border-color: var(--text-secondary); }
.btn-has-changes {
  background: rgba(255, 152, 0, 0.15);
  color: var(--quantity-color);
  border: 1px solid rgba(255, 152, 0, 0.4);
}
.btn-has-changes:hover {
  background: rgba(255, 152, 0, 0.25);
  border-color: var(--quantity-color);
}

/* Offer Cards */
.offers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(420px, 1fr));
  gap: 16px;
}

.offer-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  transition: border-color 0.2s;
}

.offer-card:hover { border-color: #444; }

.offer-card.inactive { opacity: 0.5; }

.offer-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 4px;
}

.offer-id {
  font-family: 'Courier New', monospace;
  font-size: 0.8em;
  color: var(--text-secondary);
  word-break: break-all;
}

.offer-label {
  font-size: 1.05em;
  font-weight: 600;
  margin-bottom: 2px;
  color: var(--accent);
}

.offer-title {
  font-size: 0.9em;
  color: var(--text-primary);
  margin: 6px 0 12px 0;
  font-weight: 500;
}

.offer-actions {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}

.offer-fields {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 8px;
  margin-bottom: 12px;
}

.field-box {
  background: var(--bg-primary);
  border-radius: 6px;
  padding: 10px;
}

.field-label {
  font-size: 0.7em;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}

.field-value {
  font-size: 1.05em;
  font-weight: 500;
}

.field-value.price { color: var(--price-color); }
.field-value.state { color: var(--state-color); }
.field-value.version { color: var(--version-color); }
.field-value.quantity { color: var(--quantity-color); }

.offer-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8em;
  color: var(--text-secondary);
}

.offer-footer-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.offer-footer-btns {
  display: flex;
  gap: 6px;
}

.offer-footer-btns .btn {
  padding: 6px 14px;
  font-size: 0.85em;
}

.tracking-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 0.85em;
  line-height: 1;
  vertical-align: middle;
}

.tracking-badge.active { background: rgba(76, 175, 80, 0.15); color: var(--accent); }
.tracking-badge.paused { background: rgba(255, 152, 0, 0.15); color: var(--quantity-color); }

/* Flash animation for changes */
@keyframes flash-change {
  0% { background-color: rgba(255, 87, 34, 0.3); }
  100% { background-color: transparent; }
}

.field-box.changed {
  animation: flash-change 2s ease-out;
}

/* Expandable Sections */
.expand-section {
  display: none;
  margin-top: 12px;
  border-top: 1px solid var(--border);
  padding-top: 12px;
}

.expand-section.open {
  display: block;
}

/* Details Panel */
.details-grid {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 6px 12px;
  font-size: 0.85em;
}

.details-grid dt {
  color: var(--text-secondary);
  font-weight: 500;
}

.details-grid dd {
  color: var(--text-primary);
  word-break: break-word;
}

.details-section-title {
  font-size: 0.75em;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--accent);
  margin: 12px 0 6px 0;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--border);
}

.details-section-title:first-child {
  margin-top: 0;
}

.details-description {
  margin-top: 10px;
  background: var(--bg-primary);
  border-radius: 6px;
  padding: 10px;
  font-size: 0.85em;
  max-height: 150px;
  overflow-y: auto;
  white-space: pre-wrap;
  line-height: 1.5;
  color: var(--text-secondary);
}

/* Change Log (per offer) */
.change-log {
  background: var(--bg-primary);
  border-radius: 6px;
  max-height: 250px;
  overflow-y: auto;
}

.change-entry {
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85em;
}

.change-entry:last-child { border-bottom: none; }

.change-time {
  color: var(--text-secondary);
  font-size: 0.8em;
  min-width: 130px;
  font-family: monospace;
}

.change-field {
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.8em;
  font-weight: 500;
  min-width: 75px;
  text-align: center;
}

.change-field.price { background: rgba(76, 175, 80, 0.15); color: var(--price-color); }
.change-field.state { background: rgba(33, 150, 243, 0.15); color: var(--state-color); }
.change-field.offerVersion { background: rgba(156, 39, 176, 0.15); color: var(--version-color); }
.change-field.quantity { background: rgba(255, 152, 0, 0.15); color: var(--quantity-color); }
.change-field.title { background: rgba(0, 188, 212, 0.15); color: var(--title-color); }
.change-field.description { background: rgba(233, 30, 99, 0.15); color: #E91E63; }

.change-values {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 1;
  min-width: 0;
}

.change-old { color: var(--danger); text-decoration: line-through; word-break: break-word; }
.change-arrow { color: var(--text-secondary); flex-shrink: 0; }
.change-new { color: var(--accent); font-weight: 500; word-break: break-word; }

/* Stacked layout for long text changes (description, title) */
.change-entry-stacked {
  flex-direction: column;
  align-items: stretch;
  gap: 6px;
}

.change-entry-head {
  display: flex;
  align-items: center;
  gap: 10px;
}

.change-diff {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.change-diff-old, .change-diff-new {
  background: var(--bg-secondary);
  border-radius: 4px;
  padding: 6px 10px;
  font-size: 0.85em;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
}

.change-diff-old {
  color: var(--danger);
  border-left: 3px solid var(--danger);
}

.change-diff-new {
  color: var(--accent);
  border-left: 3px solid var(--accent);
}

.changes-empty {
  padding: 20px;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.85em;
}

/* Proxy Management */
.proxy-form {
  margin-bottom: 20px;
}

.proxy-form textarea {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 10px 14px;
  border-radius: 6px;
  font-size: 0.9em;
  font-family: monospace;
  resize: vertical;
  min-height: 80px;
  outline: none;
}

.proxy-form textarea:focus { border-color: var(--accent); }

.proxy-list {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.proxy-entry {
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: monospace;
  font-size: 0.85em;
}

.proxy-entry:last-child { border-bottom: none; }

.proxy-url { flex: 1; word-break: break-all; }

.proxy-stats {
  display: flex;
  gap: 12px;
  align-items: center;
  color: var(--text-secondary);
  font-size: 0.85em;
  margin: 0 12px;
}

.proxy-fail-high { color: var(--danger); }

.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-secondary);
}

.empty-state p {
  margin-bottom: 8px;
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: #444; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #555; }

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  width: 90%;
  max-width: 700px;
  max-height: 85vh;
  overflow-y: auto;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.modal-header h3 {
  color: var(--accent);
  font-size: 1.1em;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.5em;
  cursor: pointer;
  padding: 0 4px;
  line-height: 1;
}

.modal-close:hover { color: var(--text-primary); }

/* Import offers list */
.import-offers-list {
  max-height: 350px;
  overflow-y: auto;
  background: var(--bg-primary);
  border-radius: 8px;
  border: 1px solid var(--border);
}

.import-offer-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 0.85em;
}

.import-offer-row:last-child { border-bottom: none; }

.import-offer-row input[type="checkbox"] {
  accent-color: var(--accent);
  width: 16px;
  height: 16px;
  cursor: pointer;
}

.import-offer-title { flex: 1; }

.import-offer-price { color: var(--price-color); min-width: 60px; text-align: right; }

.import-offer-state { color: var(--state-color); min-width: 60px; text-align: center; }

.import-offer-qty { color: var(--quantity-color); min-width: 40px; text-align: right; }

.import-select-all {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  font-size: 0.85em;
  color: var(--text-secondary);
  position: sticky;
  top: 0;
  z-index: 1;
}

/* Responsive */
@media (max-width: 768px) {
  .offers-grid { grid-template-columns: 1fr; }
  .offer-fields { grid-template-columns: 1fr 1fr; }
  .add-form { flex-direction: column; }
  .add-form input[name="label"] { width: 100%; }
  header { flex-direction: column; gap: 10px; }
}