/* ==========================================================================
   DDoS IP Monitoring & Notification System - Modern Enterprise CSS Tokens
   ========================================================================== */

:root {
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;

  /* Color Palette - Clean Enterprise HSL */
  --bg-app: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-hover: #f1f5f9;
  --bg-surface-subtle: #f8fafc;

  --border-subtle: #e2e8f0;
  --border-medium: #cbd5e1;
  --border-strong: #94a3b8;

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-inverse: #ffffff;

  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: #eff6ff;
  --primary-border: #bfdbfe;

  --success: #059669;
  --success-light: #ecfdf5;
  --success-border: #a7f3d0;

  --warning: #d97706;
  --warning-light: #fffbeb;
  --warning-border: #fde68a;

  --danger: #dc2626;
  --danger-hover: #b91c1c;
  --danger-light: #fef2f2;
  --danger-border: #fecaca;

  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-modal: 0 20px 25px -5px rgb(0 0 0 / 0.2), 0 8px 10px -6px rgb(0 0 0 / 0.2);

  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-app);
  color: var(--text-primary);
  line-height: 1.5;
  font-size: 14px;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ==========================================================================
   App Layout & Header
   ========================================================================== */

#app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.top-navbar {
  background-color: #0f172a;
  color: #ffffff;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid #1e293b;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.brand-section {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, #3b82f6, #1d4ed8);
  border-radius: var(--radius-md);
  color: #ffffff;
  font-weight: 700;
  font-size: 18px;
  box-shadow: 0 2px 4px rgba(37, 99, 235, 0.3);
}

.brand-info h1 {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: #f8fafc;
}

.brand-info p {
  font-size: 11px;
  color: #94a3b8;
  letter-spacing: 0.02em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-btn {
  background: transparent;
  border: none;
  color: #94a3b8;
  font-family: var(--font-sans);
  font-size: 13.5px;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all var(--transition-fast);
}

.nav-btn:hover {
  color: #f8fafc;
  background-color: rgba(255, 255, 255, 0.08);
}

.nav-btn.active {
  color: #ffffff;
  background-color: #1e293b;
  font-weight: 600;
}

.nav-badge {
  background-color: #dc2626;
  color: #ffffff;
  font-size: 11px;
  font-weight: 700;
  padding: 1px 6px;
  border-radius: var(--radius-full);
}

.header-status-area {
  display: flex;
  align-items: center;
  gap: 16px;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 500;
  background: #1e293b;
  color: #e2e8f0;
}

.status-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #94a3b8;
}

.status-indicator.active {
  background-color: #10b981;
  box-shadow: 0 0 8px #10b981;
  animation: pulse-dot 2s infinite;
}

.status-indicator.stopped {
  background-color: #f59e0b;
}

.status-indicator.error {
  background-color: #ef4444;
}

@keyframes pulse-dot {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.15); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.main-content {
  flex: 1;
  padding: 28px 32px;
  max-width: 1440px;
  margin: 0 auto;
  width: 100%;
}

/* ==========================================================================
   Page Headers & Metric KPI Cards
   ========================================================================== */

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 16px;
}

.page-title-group h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.page-title-group p {
  font-size: 13.5px;
  color: var(--text-muted);
  margin-top: 2px;
}

.page-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.metric-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.metric-card:hover {
  box-shadow: var(--shadow-md);
}

.metric-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--text-muted);
  font-size: 12.5px;
  font-weight: 500;
}

.metric-value {
  font-size: 26px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 8px 0 4px;
  letter-spacing: -0.02em;
}

.metric-subtitle {
  font-size: 12px;
  color: var(--text-muted);
}

.metric-card.highlight-danger .metric-value {
  color: var(--danger);
}
.metric-card.highlight-primary .metric-value {
  color: var(--primary);
}

/* ==========================================================================
   Card Components & Panels
   ========================================================================== */

.card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  margin-bottom: 24px;
  overflow: hidden;
}

.card-header {
  padding: 18px 24px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: var(--bg-surface);
}

.card-header h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-header p {
  font-size: 12.5px;
  color: var(--text-muted);
  margin-top: 2px;
}

.card-body {
  padding: 24px;
}

/* ==========================================================================
   Buttons & Form Controls
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 13.5px;
  font-weight: 500;
  padding: 9px 16px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  user-select: none;
}

.btn-primary {
  background-color: var(--primary);
  color: #ffffff;
}
.btn-primary:hover {
  background-color: var(--primary-hover);
}

.btn-secondary {
  background-color: #ffffff;
  border-color: var(--border-medium);
  color: var(--text-primary);
}
.btn-secondary:hover {
  background-color: var(--bg-surface-hover);
  border-color: var(--border-strong);
}

.btn-danger {
  background-color: var(--danger);
  color: #ffffff;
}
.btn-danger:hover {
  background-color: var(--danger-hover);
}

.btn-danger-outline {
  background-color: transparent;
  border-color: var(--danger-border);
  color: var(--danger);
}
.btn-danger-outline:hover {
  background-color: var(--danger-light);
}

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

.btn-sm {
  font-size: 12.5px;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
}

.btn-icon {
  padding: 6px 8px;
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
}
.btn-icon:hover {
  background: var(--bg-surface-hover);
  color: var(--text-primary);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group.full-width {
  grid-column: 1 / -1;
}

.form-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.form-hint {
  font-size: 11.5px;
  color: var(--text-muted);
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  font-family: var(--font-sans);
  font-size: 13.5px;
  padding: 9px 12px;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  background-color: #ffffff;
  color: var(--text-primary);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.form-input.mono, .form-textarea.mono {
  font-family: var(--font-mono);
  font-size: 13px;
}

.form-textarea {
  resize: vertical;
  min-height: 100px;
}

/* ==========================================================================
   Data Tables
   ========================================================================== */

.table-container {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  background: var(--bg-surface);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 13.5px;
}

.data-table th {
  background-color: #f8fafc;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 12px 18px;
  border-bottom: 1px solid var(--border-subtle);
  white-space: nowrap;
}

.data-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-primary);
  vertical-align: middle;
}

.data-table tbody tr:hover {
  background-color: var(--bg-surface-hover);
}

.data-table tbody tr:last-child td {
  border-bottom: none;
}

.table-ip-cell {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--text-primary);
}

.table-bandwidth-cell {
  font-weight: 600;
  color: var(--danger);
  font-family: var(--font-mono);
}

.table-empty {
  text-align: center;
  padding: 48px 24px;
  color: var(--text-muted);
}

.table-empty-icon {
  font-size: 32px;
  margin-bottom: 12px;
}

/* ==========================================================================
   Badges, Pills & Chips
   ========================================================================== */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  border-radius: var(--radius-full);
  font-size: 11.5px;
  font-weight: 500;
  line-height: 1.2;
}

.badge-primary {
  background-color: var(--primary-light);
  color: var(--primary);
  border: 1px solid var(--primary-border);
}

.badge-success {
  background-color: var(--success-light);
  color: var(--success);
  border: 1px solid var(--success-border);
}

.badge-warning {
  background-color: var(--warning-light);
  color: var(--warning);
  border: 1px solid var(--warning-border);
}

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

.badge-mono {
  font-family: var(--font-mono);
}

.chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

/* ==========================================================================
   Toolbars & Filter Bars
   ========================================================================== */

.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.search-box {
  position: relative;
  min-width: 260px;
  flex: 1;
  max-width: 400px;
}

.search-input {
  width: 100%;
  padding: 9px 12px 9px 36px;
  font-size: 13.5px;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
}

.search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

/* ==========================================================================
   Modals & Overlays
   ========================================================================== */

.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(2px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
}

.modal-content {
  background-color: var(--bg-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-modal);
  width: 100%;
  max-width: 540px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: modal-pop 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-content.modal-lg {
  max-width: 760px;
}

@keyframes modal-pop {
  from { opacity: 0; transform: scale(0.96); }
  to { opacity: 1; transform: scale(1); }
}

.modal-header {
  padding: 18px 24px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.modal-body {
  padding: 24px;
  overflow-y: auto;
  flex: 1;
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  background-color: #f8fafc;
}

/* ==========================================================================
   Toast Notifications
   ========================================================================== */

#toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 9999;
}

.toast {
  background-color: #0f172a;
  color: #ffffff;
  padding: 12px 18px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13.5px;
  max-width: 400px;
  animation: toast-slide 0.25s ease forwards;
}

.toast.toast-success {
  border-left: 4px solid var(--success);
}
.toast.toast-danger {
  border-left: 4px solid var(--danger);
}
.toast.toast-warning {
  border-left: 4px solid var(--warning);
}

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

/* ==========================================================================
   Login / Setup Card
   ========================================================================== */

.auth-wrapper {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: radial-gradient(circle at 50% 20%, #1e293b 0%, #0f172a 100%);
}

.auth-card {
  background: #ffffff;
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  width: 100%;
  max-width: 440px;
  box-shadow: var(--shadow-modal);
}

.auth-header {
  text-align: center;
  margin-bottom: 28px;
}

.auth-logo {
  width: 52px;
  height: 52px;
  background: linear-gradient(135deg, #2563eb, #1e40af);
  border-radius: var(--radius-lg);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  font-weight: 700;
  margin: 0 auto 16px;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
}

.auth-header h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
}

.auth-header p {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
}

.password-rules {
  background-color: #f8fafc;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  margin-top: 8px;
}

.password-rules p {
  font-size: 11.5px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.rule-item {
  font-size: 11.5px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 3px;
}

.rule-item.valid {
  color: var(--success);
  font-weight: 500;
}

/* ==========================================================================
   Prefix Mapping Panel & Chips
   ========================================================================== */

.prefix-selector-box {
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px;
  max-height: 180px;
  overflow-y: auto;
  background-color: #f8fafc;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.prefix-checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  cursor: pointer;
}

.template-helpers {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 6px;
}

.tag-btn {
  background: var(--bg-surface-subtle);
  border: 1px dashed var(--border-medium);
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-secondary);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.tag-btn:hover {
  background: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary);
}

/* Responsive Breakpoints */
@media (max-width: 768px) {
  .top-navbar {
    padding: 0 16px;
    height: auto;
    flex-direction: column;
    padding: 12px 16px;
    gap: 12px;
  }
  .main-content {
    padding: 16px;
  }
  .nav-links {
    width: 100%;
    justify-content: space-around;
  }
}