:root {
  --app-bg: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f766e 100%);
  --surface: rgba(30, 41, 59, 0.85);
  --surface-border: rgba(100, 116, 139, 0.25);
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-soft: #94a3b8;
  --shadow-soft: 0 0.5rem 1rem rgba(0, 0, 0, 0.25);
  --shadow-md: 0 1rem 2rem rgba(0, 0, 0, 0.35);
  --shadow-hover: 0 1.25rem 2.5rem rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 1.5rem 3rem rgba(0, 0, 0, 0.5);
  --focus-ring: 0 0 0 0.25rem rgba(34, 197, 94, 0.35);
  --transition-fast: 0.15s ease;
  --transition-normal: 0.2s ease;
  --transition-slow: 0.3s ease;
  --accent-primary: #22c55e;
  --accent-secondary: #06b6d4;
  --accent-danger: #ef4444;
  --accent-warning: #f59e0b;
}

body {
  background: var(--app-bg);
  background-attachment: fixed;
  min-height: 100vh;
  color: var(--text-primary);
  font-family: "Manrope", "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  font-size: 0.95rem;
  position: relative;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(circle at 20% 50%, rgba(34, 197, 94, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(6, 182, 212, 0.08) 0%, transparent 50%),
    radial-gradient(circle at 40% 20%, rgba(239, 68, 68, 0.04) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
}

html {
  scroll-behavior: smooth;
}

.wrapper {
  background: transparent;
}

.card {
  background: linear-gradient(135deg, var(--surface) 0%, rgba(30, 41, 59, 0.75) 100%);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--surface-border);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  border-radius: 1rem;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), background-color var(--transition-normal);
  overflow: hidden;
  position: relative;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.02) 0%, transparent 50%);
  pointer-events: none;
}

.card:hover {
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.4);
  transform: translateY(-4px);
  border-color: rgba(100, 116, 139, 0.4);
}

.card-header {
  border-bottom: 1px solid var(--surface-border) !important;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.5) 0%, rgba(15, 23, 42, 0.3) 100%) !important;
  padding: 1.25rem !important;
  position: relative;
}

.card-header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-primary), transparent);
}

.card-title {
  color: var(--text-primary);
  font-weight: 600;
  letter-spacing: -0.3px;
}

.btn {
  border-radius: 0.75rem;
  font-weight: 600;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), filter var(--transition-fast), background-color var(--transition-normal), border-color var(--transition-normal);
  letter-spacing: 0.3px;
  border: none;
  padding: 0.5rem 1rem;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.2) 0%, transparent 70%);
  transition: left var(--transition-normal);
}

.btn:hover::before {
  left: 100%;
}

.btn-lg {
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
}

.btn:hover {
  transform: translateY(-2px);
  filter: saturate(1.08);
  box-shadow: var(--shadow-md);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary,
.btn-success,
.btn-danger,
.btn-info {
  box-shadow: 0 4px 12px rgba(34, 197, 94, 0.25);
}

.btn-outline-primary:hover,
.btn-outline-success:hover,
.btn-outline-danger:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-soft);
}

.btn:focus-visible,
.form-control:focus,
.form-select:focus,
.form-check-input:focus {
  box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.2);
  border-color: var(--accent-primary);
}

.form-control,
.form-select {
  border-radius: 0.75rem;
  border: 1px solid rgba(100, 116, 139, 0.3);
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.7) 0%, rgba(30, 41, 59, 0.5) 100%);
  color: var(--text-primary);
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal), background-color var(--transition-normal);
  font-size: 0.95rem;
  padding: 0.75rem 1rem;
}

.form-select {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23f1f5f9' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m2 5 6 6 6-6'/%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  background-size: 16px 12px;
  padding-right: 2.5rem;
}

.form-select option {
  background-color: #1e293b;
  color: #f1f5f9;
  padding: 0.75rem 1rem;
  border: none;
}

.form-select option:hover {
  background-color: #22c55e;
  background-image: linear-gradient(#22c55e, #22c55e);
  color: white;
}

.form-select option:checked {
  background-color: #22c55e;
  background-image: linear-gradient(#22c55e, #22c55e);
  color: white;
  font-weight: 600;
}

.form-control::placeholder {
  color: var(--text-soft);
  opacity: 0.6;
}

.form-control:focus,
.form-select:focus {
  border-color: var(--accent-primary);
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.9) 0%, rgba(30, 41, 59, 0.7) 100%);
  box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.1), inset 0 2px 8px rgba(0, 0, 0, 0.2);
  outline: none;
}

.form-label {
  color: var(--text-primary);
  font-weight: 600;
  margin-bottom: 0.625rem;
  letter-spacing: -0.2px;
  text-transform: capitalize;
}

.form-check-input {
  width: 1.25rem;
  height: 1.25rem;
  border: 2px solid rgba(15, 23, 42, 0.15);
  border-radius: 0.35rem;
  transition: all var(--transition-fast);
}

.form-check-input:checked {
  background-color: #2f81f7;
  border-color: #2f81f7;
}

.text-medium-emphasis {
  color: var(--text-secondary) !important;
}

.text-soft {
  color: var(--text-soft);
}

.sidebar {
  border-right: 1px solid rgba(255, 255, 255, 0.08);
}

.sidebar .nav-link {
  border-radius: 0.6rem;
  margin: 0.2rem 0.5rem;
  transition: background-color 0.18s ease, transform 0.18s ease;
}

.sidebar .nav-link:hover {
  transform: translateX(2px);
}

.sidebar .nav-link i {
  margin-right: 0.45rem;
}

/* Table Styling */
.app-table,
.table {
  margin-bottom: 0;
}

.app-table thead th,
.table thead th {
  letter-spacing: 0.03em;
  font-size: 0.8rem;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--text-secondary);
  border-bottom: 2px solid var(--surface-border);
  padding: 1.1rem 1rem;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.4) 0%, rgba(15, 23, 42, 0.2) 100%);
}

.app-table tbody td,
.table tbody td {
  padding: 1rem;
  border-bottom: 1px solid rgba(100, 116, 139, 0.1);
  vertical-align: middle;
  color: var(--text-primary);
}

.table-hover tbody tr:hover {
  background-color: rgba(34, 197, 94, 0.08);
  transition: background-color var(--transition-fast);
}

.table-responsive {
  border-radius: 0.8rem;
}

.header {
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.85) 0%, rgba(15, 23, 42, 0.75) 100%);
  border-bottom: 1px solid var(--surface-border);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.footer {
  border-top: 1px solid var(--surface-border);
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.85) 0%, rgba(15, 23, 42, 0.75) 100%);
  color: var(--text-secondary);
  padding: 2rem 0;
  font-size: 0.9rem;
}

.app-content {
  padding-bottom: 1rem;
}

.alert {
  border: 0;
  border-radius: 0.8rem;
  box-shadow: var(--shadow-soft);
  border-left: 4px solid;
  animation: slideIn var(--transition-normal);
}

.alert-success {
  border-left-color: #16a34a;
}

.alert-danger {
  border-left-color: #dc2626;
}

.alert-warning {
  border-left-color: #f59e0b;
}

.alert-info {
  border-left-color: #0e7490;
}

a {
  transition: color var(--transition-fast);
}

.auth-page-shell {
  min-height: calc(100vh - 180px);
}

.hero-gradient-dark {
  background: linear-gradient(135deg, #064e3b 0%, #0f766e 50%, #06b6d4 100%);
  position: relative;
  overflow: hidden;
  border-radius: 1.25rem;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

.panel-gradient-soft {
  background: linear-gradient(135deg, #eef4ff 0%, #edfdf8 100%);
  border-radius: 1rem;
}

.input-gradient {
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.8) 0%, rgba(30, 41, 59, 0.6) 100%) !important;
  border: 1px solid rgba(100, 116, 139, 0.4) !important;
}

.threat-model-card {
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.threat-model-card:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-hover);
}

.fab-action {
  right: 2rem;
  bottom: 2rem;
  z-index: 1040;
  border-radius: 999px;
  box-shadow: var(--shadow-lg);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.fab-action:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-lg);
}

.metric-card-primary {
  background: linear-gradient(135deg, #22c55e 0%, #16a34a 100%);
  border: none;
  box-shadow: 0 8px 24px rgba(34, 197, 94, 0.35);
  color: white;
}

.metric-card-info {
  background: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);
  border: none;
  box-shadow: 0 8px 24px rgba(6, 182, 212, 0.35);
  color: white;
}

.metric-card-danger {
  background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  border: none;
  box-shadow: 0 8px 24px rgba(239, 68, 68, 0.35);
  color: white;
}

.metric-card-warning {
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  border: none;
  box-shadow: 0 8px 24px rgba(245, 158, 11, 0.35);
  color: white;
}

.metric-card-primary:hover,
.metric-card-info:hover,
.metric-card-danger:hover,
.metric-card-warning:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.chart-placeholder {
  height: 300px;
  background: rgba(47, 129, 247, 0.02);
  border-radius: 0.8rem;
}

.profile-kv {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px dashed rgba(15, 23, 42, 0.1);
  padding-block: 0.9rem;
}

.profile-kv:last-child {
  border-bottom: 0;
}

.profile-kv strong {
  color: var(--text-primary);
  font-weight: 600;
}

.section-title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
  font-size: 1.1rem;
}

.section-title i {
  color: #2f81f7;
  font-size: 1.25rem;
}

.app-table thead th {
  letter-spacing: 0.02em;
  font-size: 0.8rem;
  text-transform: uppercase;
}

.chip-soft {
  border-radius: 999px;
  padding: 0.5rem 0.875rem;
  background: linear-gradient(135deg, rgba(34, 197, 94, 0.15) 0%, rgba(34, 197, 94, 0.08) 100%);
  color: var(--accent-primary);
  font-weight: 600;
  font-size: 0.8rem;
  display: inline-block;
  border: 1px solid rgba(34, 197, 94, 0.3);
}

.badge {
  padding: 0.5rem 0.875rem;
  font-weight: 600;
  font-size: 0.8rem;
  border-radius: 0.5rem;
  letter-spacing: 0.3px;
}

.risk-critical { background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%); color: #fff; }
.risk-high { background: linear-gradient(135deg, #f97316 0%, #ea580c 100%); color: #fff; }
.risk-medium { background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%); color: #000; }
.risk-low { background: linear-gradient(135deg, #22c55e 0%, #16a34a 100%); color: #fff; }

/* Methodology-specific styling */
.methodology-badge {
  padding: 0.75rem 1.5rem;
  border-radius: 0.75rem;
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  display: inline-block;
}

.methodology-stride {
  background: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);
  color: white;
}

.methodology-pasta {
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  color: white;
}

.methodology-dread {
  background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  color: white;
}

.methodology-dread {
  background: linear-gradient(135deg, #22c55e 0%, #16a34a 100%);
  color: white;
}

.threat-category-card {
  background: linear-gradient(135deg, rgba(34, 197, 94, 0.1) 0%, rgba(6, 182, 212, 0.05) 100%);
  border: 1px solid rgba(34, 197, 94, 0.2);
  border-radius: 0.875rem;
  padding: 1.5rem;
  margin-bottom: 1rem;
  transition: all var(--transition-normal);
}

.threat-category-card:hover {
  border-color: rgba(34, 197, 94, 0.4);
  background: linear-gradient(135deg, rgba(34, 197, 94, 0.15) 0%, rgba(6, 182, 212, 0.08) 100%);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(34, 197, 94, 0.1);
}

.threat-category-label {
  display: inline-block;
  font-weight: 700;
  color: var(--accent-primary);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 0.5rem;
}

.dread-score-display {
  background: linear-gradient(135deg, rgba(34, 197, 94, 0.1) 0%, rgba(6, 182, 212, 0.1) 100%);
  border-left: 4px solid var(--accent-primary);
  padding: 1rem 1.25rem;
  border-radius: 0.5rem;
  margin: 1rem 0;
}

.dread-factor {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 0;
  border-bottom: 1px solid rgba(100, 116, 139, 0.1);
}

.dread-factor:last-child {
  border-bottom: none;
}

.dread-factor-label {
  font-weight: 600;
  color: var(--text-secondary);
}

.dread-factor-value {
  background: linear-gradient(135deg, var(--accent-primary) 0%, rgba(34, 197, 94, 0.7) 100%);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  font-weight: 700;
  font-size: 0.85rem;
}

/* Animations */
@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes fadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

/* Staggered page-load reveal animation */
.reveal-item {
  opacity: 0;
  transform: translateY(10px);
}

body.is-ready .reveal-item {
  animation: fadeUp 0.42s ease both;
  animation-delay: var(--reveal-delay, 0ms);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }

  .reveal-item {
    opacity: 1;
    transform: none;
  }
}

/* Loading skeleton animation */
.skeleton {
  background: linear-gradient(90deg, rgba(15, 23, 42, 0.05) 0%, rgba(15, 23, 42, 0.1) 50%, rgba(15, 23, 42, 0.05) 100%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Responsive improvements */
@media (max-width: 768px) {
  .card {
    border-radius: 0.875rem;
  }

  .btn {
    padding: 0.5rem 0.875rem;
  }

  .btn-lg {
    padding: 0.625rem 1.25rem;
    font-size: 0.95rem;
  }

  .section-title {
    font-size: 1rem;
  }

  .profile-kv {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
}

/* Accessibility improvements */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}