:root {
  --ink: #1e293b;
  --paper: #f8fafc;
  --card: #ffffff;
  --accent: #f97316;
  --accent-soft: #fff7ed;
  --accent-hover: #ea5800;
  --success: #2e8b57;
  --success-soft: #e8f5e9;
  --warning: #f4a261;
  --warning-soft: #fef3e2;
  --danger: #e63946;
  --danger-soft: #fce8e8;
  --border: #e2e8f0;
  --shadow: 0 4px 6px -1px rgba(0,0,0,0.05), 0 2px 4px -2px rgba(0,0,0,0.03);
  --shadow-lg: 0 20px 25px -5px rgba(0,0,0,0.05), 0 8px 10px -6px rgba(0,0,0,0.02);
  --radius: 12px;
  --radius-sm: 8px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

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

/* Header */
.site-header {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 1rem 2rem;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--accent), var(--success));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 1.2rem;
}

.brand h1 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.02em;
}

.brand-tagline {
  font-size: 0.8rem;
  color: #64748b;
  font-weight: 500;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-link {
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: #64748b;
  transition: all 0.2s;
}

.nav-link:hover {
  background: var(--accent-soft);
  color: var(--accent);
  text-decoration: none;
}

.nav-link.active {
  background: var(--accent);
  color: white;
}

.wallet-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.wallet-actions button {
  padding: 0.55rem 1.2rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-primary {
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: white;
  border: none;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

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

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-secondary {
  background: white;
  color: var(--ink);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--paper);
}

/* Session bar */
.session-bar {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.75rem 2rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.8rem;
  color: #64748b;
  flex-wrap: wrap;
}

.session-divider {
  width: 1px;
  height: 14px;
  background: var(--border);
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
  flex-shrink: 0;
}

.dot-unknown { background: #cbd5e1; }
.dot-ok { background: var(--success); }
.dot-bad { background: var(--danger); }

.role-badge {
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

/* Main */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
  min-height: calc(100vh - 160px);
}

/* Landing page */
.landing-hero {
  text-align: center;
  padding: 5rem 2rem 4rem;
  background: linear-gradient(135deg, rgba(0,0,0,0.65), rgba(0,0,0,0.45)), url('img/heroBg.png') center/cover no-repeat;
  color: white;
  border-radius: var(--radius);
  margin-bottom: 2rem;
}

.landing-hero h2 {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 1rem;
  color: white;
  text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.landing-hero p {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.9);
  max-width: 600px;
  margin: 0 auto 2rem;
  text-shadow: 0 1px 3px rgba(0,0,0,0.3);
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-actions .btn-primary,
.hero-actions .btn-secondary {
  padding: 0.75rem 2rem;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
}

.hero-actions .btn-secondary {
  border: 1px solid var(--border);
}

/* Features */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin: 3rem 0;
}

.feature-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  box-shadow: var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.feature-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.feature-card p {
  font-size: 0.9rem;
  color: #64748b;
  line-height: 1.6;
}

/* How it works */
.how-it-works {
  margin: 3rem 0;
  text-align: center;
}

.how-it-works h2 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 2rem;
}

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  counter-reset: step;
}

.step {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  position: relative;
  box-shadow: var(--shadow);
}

.step-number {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.step h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.step p {
  font-size: 0.85rem;
  color: #64748b;
}

/* App pages */
.page-header {
  margin-bottom: 1.5rem;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: #64748b;
  margin-bottom: 0.75rem;
}

.breadcrumb a {
  color: var(--accent);
}

.breadcrumb a:hover {
  text-decoration: underline;
}

.page-header h2 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.page-header p {
  color: #64748b;
  margin-top: 0.25rem;
}

.app-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
  max-width: 700px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--ink);
}

.form-group label .optional {
  font-weight: 400;
  color: #94a3b8;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.65rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-family: inherit;
  background: white;
  color: var(--ink);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0,119,182,0.1);
}

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

.form-group .wallet-output {
  min-height: 44px;
  padding: 0.65rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--paper);
  color: #64748b;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
}

.form-actions {
  display: flex;
  gap: 1rem;
  align-items: center;
  margin-top: 1.5rem;
}

.form-status {
  min-height: 1.25rem;
  font-size: 0.85rem;
  color: #64748b;
}

.form-status.error { color: var(--danger); }
.form-status.success { color: var(--success); }

.output {
  margin-top: 1.25rem;
  background: var(--paper);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem;
  font-size: 0.8rem;
  max-height: 300px;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-word;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  display: none;
}

.output.visible { display: block; }

.next-step {
  margin-top: 1.5rem;
  padding: 1rem 1.25rem;
  background: var(--accent-soft);
  border: 1px solid #fdba74;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.next-step p {
  font-size: 0.9rem;
  color: var(--accent);
  font-weight: 500;
}

.next-step .btn-primary {
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  white-space: nowrap;
}

/* Dashboard */
.dashboard-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.dashboard-header h2 {
  font-size: 1.75rem;
  font-weight: 700;
}

.refresh-btn {
  padding: 0.55rem 1.25rem;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: white;
  border: none;
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s;
}

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

.table-container {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  max-width: 1000px;
  margin: 0 auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.data-table th,
.data-table td {
  padding: 0.9rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.data-table th {
  background: var(--paper);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: #64748b;
}

.data-table tbody tr:hover {
  background: var(--paper);
}

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

.verdict-suspected_fraud { background: var(--danger-soft); }
.verdict-clean { background: var(--success-soft); }
.verdict-concerns { background: var(--warning-soft); }
.verdict-none { background: transparent; }

.badge {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  margin: 2px;
}

.badge-critical { background: var(--danger-soft); color: var(--danger); }
.badge-moderate { background: var(--warning-soft); color: #b45309; }
.badge-minor { background: #f1f5f9; color: #475569; }

.details-btn {
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-sm);
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid #bae6fd;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.details-btn:hover {
  background: #bae6fd;
}

.detail-row td {
  padding: 1.25rem;
  background: #f8fafc;
  border-bottom: 2px solid var(--border);
  white-space: normal;
}

.detail-report, .detail-flag {
  padding: 0.75rem 0;
  border-bottom: 1px dashed var(--border);
}

.detail-report:last-child, .detail-flag:last-child {
  border-bottom: none;
}

.detail-summary {
  margin-top: 0.3rem;
  color: #475569;
  font-size: 0.85rem;
}

.detail-meta {
  margin-top: 0.2rem;
  color: #94a3b8;
  font-size: 0.75rem;
}

.detail-empty {
  color: #94a3b8;
  font-size: 0.85rem;
}

.detail-row h4 {
  margin: 0.5rem 0 0.4rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #64748b;
}

/* Dialog */
dialog {
  width: min(560px, calc(100vw - 2rem));
  max-height: calc(100vh - 2rem);
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}

dialog::backdrop {
  background: rgba(15, 23, 42, 0.4);
}

.signature-dialog {
  padding: 1.5rem;
}

.signature-dialog h2 {
  margin: 0 0 1rem;
  font-size: 1.1rem;
}

.signature-dialog pre {
  max-height: 40vh;
  padding: 1rem;
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--paper);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  font-size: 0.75rem;
}

.dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.dialog-actions button {
  padding: 0.55rem 1.25rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
}

/* Footer */
.site-footer {
  text-align: center;
  padding: 2rem;
  font-size: 0.8rem;
  color: #94a3b8;
  border-top: 1px solid var(--border);
}

/* App tabs */
.app-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  justify-content: center;
}

.tab-btn {
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--card);
  color: #64748b;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.tab-btn:hover {
  background: var(--accent-soft);
  color: var(--accent);
}

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

.tab-content {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
  animation: fadeIn 0.25s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Responsive */
@media (max-width: 768px) {
  .header-inner {
    flex-wrap: wrap;
  }

  .nav-links {
    order: 3;
    width: 100%;
    justify-content: center;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border);
    margin-top: 0.5rem;
  }

  .landing-hero h2 {
    font-size: 1.75rem;
  }

  main {
    padding: 1.5rem 1rem;
  }

  .app-card {
    padding: 1.5rem;
  }

  .form-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .next-step {
    flex-direction: column;
    text-align: center;
  }

  .data-table th,
  .data-table td {
    padding: 0.6rem;
    font-size: 0.8rem;
  }
}

@media (max-width: 480px) {
  .site-header {
    padding: 1rem;
  }

  .brand h1 {
    font-size: 1.1rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
}