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

:root {
  --bg: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-tertiary: #f1f3f5;
  --text: #1a1a2e;
  --text-secondary: #6c757d;
  --text-muted: #adb5bd;
  --border: #e9ecef;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-light: #dbeafe;
  --danger: #dc2626;
  --danger-light: #fee2e2;
  --success: #16a34a;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 25px rgba(0,0,0,0.12);
  --radius: 8px;
  --radius-sm: 4px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --topbar-height: 52px;
  --tabbar-height: 44px;
  --footer-height: 36px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border: #334155;
    --accent: #3b82f6;
    --accent-hover: #60a5fa;
    --accent-light: #1e3a5f;
    --shadow: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.4);
  }
}

html, body {
  height: 100%;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
}

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

input, select, button, textarea {
  font-family: inherit;
  font-size: inherit;
}

/* Login */
.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1e3a5f 0%, #0f172a 100%);
}

.login-card {
  background: var(--bg);
  padding: 40px;
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 400px;
  text-align: center;
}

.login-logo { margin-bottom: 16px; }

.login-card h1 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 4px;
}

.login-subtitle {
  color: var(--text-secondary);
  font-size: 13px;
  margin-bottom: 24px;
}

.alert {
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  margin-bottom: 16px;
}

.alert-error {
  background: var(--danger-light);
  color: var(--danger);
  border: 1px solid var(--danger);
}

.form-group {
  text-align: left;
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-secondary);
}

.form-group input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg);
  color: var(--text);
  transition: border-color 0.15s;
}

.form-group input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: none;
  border-radius: var(--radius-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}

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

.btn-primary:hover {
  background: var(--accent-hover);
}

.btn-block {
  width: 100%;
  justify-content: center;
  padding: 11px 16px;
}

.btn-outline {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.btn-outline:hover {
  background: var(--bg-secondary);
  color: var(--text);
}

.btn-sm {
  padding: 5px 10px;
  font-size: 12px;
}

/* Layout */
body {
  display: flex;
  flex-direction: column;
}

.topbar {
  height: var(--topbar-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  flex-shrink: 0;
}

.topbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-title {
  font-weight: 700;
  font-size: 15px;
  display: block;
  line-height: 1.2;
}

.brand-version {
  font-size: 11px;
  color: var(--text-muted);
  display: block;
  line-height: 1.2;
}

.topbar-user {
  display: flex;
  align-items: center;
  gap: 12px;
}

.user-name {
  font-size: 13px;
  color: var(--text-secondary);
}

.tabbar {
  height: var(--tabbar-height);
  display: flex;
  border-bottom: 1px solid var(--border);
  background: var(--bg-secondary);
  flex-shrink: 0;
  padding: 0 12px;
  overflow-x: auto;
}

.tab {
  padding: 0 18px;
  border: none;
  background: none;
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.15s;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 6px;
}

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

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

.tab-count {
  font-size: 11px;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  padding: 1px 7px;
  border-radius: 10px;
}

.tab.active .tab-count {
  background: var(--accent-light);
  color: var(--accent);
}

.main-content {
  flex: 1;
  overflow-y: auto;
  position: relative;
}

.toolbar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 10;
}

.search-box {
  position: relative;
  flex: 1;
  max-width: 360px;
}

.search-icon {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.search-box input {
  width: 100%;
  padding: 8px 12px 8px 32px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-secondary);
  color: var(--text);
  transition: all 0.15s;
}

.search-box input:focus {
  outline: none;
  border-color: var(--accent);
  background: var(--bg);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.filter-select {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--text);
  cursor: pointer;
}

.filter-select:focus {
  outline: none;
  border-color: var(--accent);
}

/* Table */
.table-wrapper {
  padding: 0;
  min-height: 200px;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
}

.data-table thead {
  position: sticky;
  top: 0;
  z-index: 5;
}

.data-table th {
  background: var(--bg-secondary);
  padding: 10px 16px;
  text-align: left;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
}

.data-table td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
  color: var(--text);
}

.col-num {
  width: 48px;
  text-align: center;
  color: var(--text-muted);
}

.data-row {
  cursor: pointer;
  transition: background 0.1s;
}

.data-row:hover {
  background: var(--accent-light);
}

.empty-state {
  display: none;
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}

/* Modal */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-overlay.open {
  display: flex;
}

.modal-card {
  background: var(--bg);
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 500px;
  max-height: 80vh;
  overflow-y: auto;
  animation: modalIn 0.2s ease-out;
}

@keyframes modalIn {
  from { opacity: 0; transform: scale(0.95) translateY(10px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}

.modal-header h3 {
  font-size: 16px;
  font-weight: 600;
}

.modal-close {
  background: none;
  border: none;
  font-size: 24px;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0 4px;
  line-height: 1;
}

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

.modal-body {
  padding: 20px;
}

.detail-row {
  display: flex;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
}

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

.detail-label {
  width: 120px;
  flex-shrink: 0;
  font-weight: 600;
  font-size: 12px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.detail-value {
  flex: 1;
  font-size: 14px;
  word-break: break-word;
}

.detail-value code {
  font-size: 12px;
  background: var(--bg-tertiary);
  padding: 2px 6px;
  border-radius: 3px;
  word-break: break-all;
}

/* Loading */
.loading-overlay {
  display: none;
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.6);
  z-index: 100;
  align-items: center;
  justify-content: center;
}

@media (prefers-color-scheme: dark) {
  .loading-overlay {
    background: rgba(15,23,42,0.6);
  }
}

.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

/* Footer */
.footer {
  height: var(--footer-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  border-top: 1px solid var(--border);
  background: var(--bg);
  font-size: 11px;
  color: var(--text-muted);
  flex-shrink: 0;
}

#statusBar {
  color: var(--text-secondary);
}

/* Responsive */
@media (max-width: 768px) {
  .topbar {
    padding: 0 12px;
  }

  .brand-version {
    display: none;
  }

  .toolbar {
    flex-wrap: wrap;
    padding: 10px 12px;
  }

  .search-box {
    max-width: 100%;
    flex: 1 1 100%;
  }

  .data-table th,
  .data-table td {
    padding: 8px 10px;
    font-size: 12px;
  }

  .modal-card {
    max-width: 100%;
    margin: 10px;
  }

  .detail-label {
    width: 90px;
    font-size: 11px;
  }
}