/* ===== CSS Variables & Reset ===== */
:root {
  --bg-primary: #0f1117;
  --bg-secondary: #1a1d2e;
  --bg-tertiary: #242840;
  --bg-card: #1e2235;
  --bg-hover: #2a2f4a;
  --bg-input: #161929;
  --border-color: #2d3154;
  --border-focus: #6366f1;
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #6366f1;
  --accent-hover: #818cf8;
  --accent-bg: rgba(99,102,241,0.12);
  --critical: #ef4444;
  --critical-bg: rgba(239,68,68,0.15);
  --high: #f97316;
  --high-bg: rgba(249,115,22,0.15);
  --medium: #eab308;
  --medium-bg: rgba(234,179,8,0.15);
  --low: #22c55e;
  --low-bg: rgba(34,197,94,0.15);
  --info: #3b82f6;
  --info-bg: rgba(59,130,246,0.15);
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --shadow: 0 4px 24px rgba(0,0,0,0.3);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
  --transition: 0.2s ease;
  --font: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'Cascadia Code', 'Fira Code', monospace;
}

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

html { font-size: 15px; scroll-behavior: smooth; }

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

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

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ===== Header ===== */
.app-header {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  position: sticky;
  top: 0;
  z-index: 100;
}

.app-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
}

.app-logo img { width: 28px; height: 28px; }

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* ===== Tab Navigation ===== */
.tab-nav {
  display: flex;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 0 24px;
  gap: 4px;
  overflow-x: auto;
  position: sticky;
  top: 60px;
  z-index: 99;
}

.tab-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  padding: 12px 20px;
  font-size: 0.9rem;
  font-family: var(--font);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: var(--transition);
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 8px;
}

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

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

.tab-btn .badge {
  background: var(--danger);
  color: #fff;
  font-size: 0.7rem;
  padding: 1px 6px;
  border-radius: 10px;
  min-width: 18px;
  text-align: center;
}

/* ===== Tab Panels ===== */
.tab-panel {
  display: none;
  padding: 24px;
  max-width: 1400px;
  margin: 0 auto;
  animation: fadeIn 0.25s ease;
}

.tab-panel.active { display: block; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition);
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.btn:hover { background: var(--bg-hover); border-color: var(--text-muted); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }

.btn-sm { padding: 5px 10px; font-size: 0.8rem; }
.btn-icon { padding: 6px 8px; }

.btn-danger { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn-danger:hover { background: #dc2626; }

.btn-success { background: var(--success); border-color: var(--success); color: #fff; }

/* ===== Form Controls ===== */
.form-group { margin-bottom: 16px; }

.form-label {
  display: block;
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-bottom: 6px;
  font-weight: 500;
}

.form-input, .form-select {
  width: 100%;
  padding: 9px 12px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 0.9rem;
  transition: var(--transition);
}

.form-input:focus, .form-select:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.15);
}

.form-input::placeholder { color: var(--text-muted); }

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394a3b8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 32px;
  cursor: pointer;
}

.form-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.form-row > * { flex: 1; min-width: 140px; }

textarea.form-input { resize: vertical; min-height: 80px; }

/* ===== Search Bar ===== */
.search-bar {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
  align-items: flex-end;
}

.search-bar .search-input-wrap {
  flex: 1;
  min-width: 250px;
  position: relative;
}

.search-bar .search-input-wrap .form-input {
  padding-left: 36px;
}

.search-bar .search-input-wrap::before {
  content: "\1F50D";
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.85rem;
  z-index: 1;
}

.filter-group {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}

/* ===== Table ===== */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-card);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.data-table th {
  background: var(--bg-tertiary);
  padding: 12px 14px;
  text-align: left;
  font-weight: 600;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
  cursor: pointer;
  user-select: none;
}

.data-table th:hover { color: var(--text-primary); }

.data-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-color);
  vertical-align: top;
}

.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: var(--bg-hover); }

.data-table .cve-id {
  color: var(--accent);
  font-family: var(--font-mono);
  font-weight: 600;
  cursor: pointer;
  font-size: 0.85rem;
}

.data-table .cve-id:hover { text-decoration: underline; }

.data-table .desc-cell {
  max-width: 400px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Sortable table headers */
.sortable-th {
  cursor: pointer;
  user-select: none;
  position: relative;
  padding-right: 22px !important;
}

.sortable-th:hover { color: var(--accent); }

.sortable-th .sort-arrow {
  font-size: 0.7rem;
  margin-left: 4px;
  opacity: 0.4;
}

.sortable-th .sort-arrow::after { content: '\2195'; }

.sortable-th.sort-asc .sort-arrow { opacity: 1; }
.sortable-th.sort-asc .sort-arrow::after { content: '\2191'; }

.sortable-th.sort-desc .sort-arrow { opacity: 1; }
.sortable-th.sort-desc .sort-arrow::after { content: '\2193'; }

/* ===== Severity Badge ===== */
.severity {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.severity-critical { background: var(--critical-bg); color: var(--critical); }
.severity-high { background: var(--high-bg); color: var(--high); }
.severity-medium { background: var(--medium-bg); color: var(--medium); }
.severity-low { background: var(--low-bg); color: var(--low); }
.severity-none { background: var(--bg-tertiary); color: var(--text-muted); }

/* ===== Card View ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 16px;
}

.cve-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 18px;
  transition: var(--transition);
  cursor: pointer;
}

.cve-card:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 20px rgba(99,102,241,0.15);
  transform: translateY(-2px);
}

.cve-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 10px;
}

.cve-card-header .cve-id { font-size: 0.95rem; }

.cve-card-desc {
  color: var(--text-secondary);
  font-size: 0.85rem;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 12px;
}

.cve-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ===== Pagination ===== */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 20px;
  flex-wrap: wrap;
}

.pagination .page-info {
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin: 0 12px;
}

/* ===== Dashboard ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
}

.stat-card.total::before { background: var(--accent); }
.stat-card.critical::before { background: var(--critical); }
.stat-card.high::before { background: var(--high); }
.stat-card.recent::before { background: var(--info); }

.stat-label {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.2;
}

.stat-card.total .stat-value { color: var(--accent); }
.stat-card.critical .stat-value { color: var(--critical); }
.stat-card.high .stat-value { color: var(--high); }
.stat-card.recent .stat-value { color: var(--info); }

.charts-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 24px;
}

.chart-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
}

.chart-box h3 {
  font-size: 0.95rem;
  margin-bottom: 16px;
  color: var(--text-secondary);
}

.chart-box canvas {
  width: 100% !important;
  max-height: 300px;
}

.chart-full { grid-column: 1 / -1; }

/* ===== Alerts ===== */
.alert-rule {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  margin-bottom: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.alert-rule-info {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.alert-keyword {
  background: var(--accent-bg);
  color: var(--accent);
  padding: 4px 12px;
  border-radius: 20px;
  font-weight: 600;
  font-size: 0.9rem;
}

.alert-log-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 14px;
  margin-bottom: 8px;
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.alert-log-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-top: 6px;
  flex-shrink: 0;
}

.alert-log-dot.critical { background: var(--critical); }
.alert-log-dot.high { background: var(--high); }
.alert-log-dot.medium { background: var(--medium); }
.alert-log-dot.low { background: var(--low); }

/* ===== History ===== */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
}

.status-unpatched { background: var(--critical-bg); color: var(--critical); }
.status-in-progress { background: var(--medium-bg); color: var(--medium); }
.status-patched { background: var(--low-bg); color: var(--low); }

/* ===== Modal ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  animation: fadeIn 0.2s ease;
  backdrop-filter: blur(4px);
}

.modal-overlay.hidden { display: none; }

.modal {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 720px;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  animation: slideUp 0.25s ease;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  background: var(--bg-secondary);
  z-index: 1;
}

.modal-header h2 {
  font-size: 1.1rem;
  font-family: var(--font-mono);
  color: var(--accent);
}

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

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

.modal-body { padding: 24px; }

.modal-section { margin-bottom: 20px; }
.modal-section:last-child { margin-bottom: 0; }

.modal-section h4 {
  font-size: 0.82rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.modal-section p, .modal-section div {
  font-size: 0.9rem;
  line-height: 1.6;
}

.cvss-vector {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  background: var(--bg-input);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  word-break: break-all;
  color: var(--text-secondary);
}

.ref-list {
  list-style: none;
  padding: 0;
}

.ref-list li {
  padding: 6px 0;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.85rem;
  word-break: break-all;
}

.ref-list li:last-child { border-bottom: none; }

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

/* ===== Toast ===== */
.toast-container {
  position: fixed;
  top: 70px;
  right: 20px;
  z-index: 300;
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: 380px;
}

.toast {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  box-shadow: var(--shadow);
  animation: slideIn 0.3s ease;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.toast.toast-exit {
  animation: slideOut 0.3s ease forwards;
}

@keyframes slideIn {
  from { opacity: 0; transform: translateX(60px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes slideOut {
  from { opacity: 1; transform: translateX(0); }
  to { opacity: 0; transform: translateX(60px); }
}

.toast-icon { font-size: 1.1rem; flex-shrink: 0; margin-top: 1px; }
.toast-body { flex: 1; }
.toast-title { font-size: 0.85rem; font-weight: 600; margin-bottom: 2px; }
.toast-msg { font-size: 0.8rem; color: var(--text-secondary); }

.toast-close {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1rem;
  padding: 0;
  flex-shrink: 0;
}

.toast.critical { border-left: 3px solid var(--critical); }
.toast.high { border-left: 3px solid var(--high); }
.toast.info { border-left: 3px solid var(--info); }
.toast.success { border-left: 3px solid var(--success); }

/* ===== Settings Panel ===== */
.settings-section {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 16px;
}

.settings-section h3 {
  font-size: 0.95rem;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-color);
}

/* ===== Loading / Empty ===== */
.loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  color: var(--text-muted);
}

.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--border-color);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: 12px;
}

@keyframes spin { to { transform: rotate(360deg); } }

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

.empty-state .empty-icon { font-size: 3rem; margin-bottom: 12px; }
.empty-state p { font-size: 0.9rem; }

/* ===== View Toggle ===== */
.view-toggle {
  display: inline-flex;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.view-toggle button {
  background: var(--bg-tertiary);
  border: none;
  color: var(--text-secondary);
  padding: 6px 12px;
  cursor: pointer;
  font-size: 0.85rem;
  transition: var(--transition);
}

.view-toggle button.active {
  background: var(--accent);
  color: #fff;
}

.view-toggle button:not(:last-child) {
  border-right: 1px solid var(--border-color);
}

/* ===== Section Header ===== */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 12px;
}

.section-header h2 {
  font-size: 1.15rem;
  font-weight: 700;
}

/* ===== Toolbar ===== */
.toolbar {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .app-header { padding: 0 14px; }
  .tab-nav { padding: 0 10px; }
  .tab-btn { padding: 10px 14px; font-size: 0.82rem; }
  .tab-panel { padding: 16px; }

  .search-bar { flex-direction: column; }
  .search-bar .search-input-wrap { min-width: unset; }

  .charts-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }

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

  .modal { max-width: 100%; margin: 10px; }
  .modal-body { padding: 16px; }

  .data-table { font-size: 0.82rem; }
  .data-table th, .data-table td { padding: 8px 10px; }
  .data-table .desc-cell { max-width: 200px; }

  .alert-rule { flex-direction: column; align-items: flex-start; }

  .form-row { flex-direction: column; }
  .form-row > * { min-width: unset; }
}

@media (max-width: 480px) {
  html { font-size: 14px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .stat-card { padding: 14px; }
  .stat-value { font-size: 1.5rem; }
  .app-logo span { display: none; }
  .toast-container { left: 10px; right: 10px; max-width: unset; }
}

/* ===== Print ===== */
@media print {
  .app-header, .tab-nav, .toast-container { display: none; }
  .tab-panel { display: block !important; padding: 0; }
  body { background: #fff; color: #000; }
}