:root {
  --bg-primary: #0a0e17;
  --bg-surface: #111827;
  --bg-surface-elevated: #1e293b;
  --border-subtle: #2d3748;
  --border-focus: #3b82f6;
  --text-primary: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --accent: #38bdf8;
  --success: #10b981;
  --danger: #ef4444;
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.portal-wrapper {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
}

.auth-card {
  width: 100%;
  max-width: 460px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 2.25rem 2rem;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.4);
}

.auth-header {
  text-align: center;
  margin-bottom: 2rem;
}

.brand-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--accent);
  background: rgba(56, 189, 248, 0.1);
  padding: 0.35rem 0.85rem;
  border-radius: 9999px;
  margin-bottom: 1rem;
  border: 1px solid rgba(56, 189, 248, 0.2);
}

.auth-title {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.auth-subtitle {
  color: var(--text-muted);
  font-size: 0.925rem;
}

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

label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

input[type="email"],
input[type="text"],
input[type="password"] {
  width: 100%;
  padding: 0.75rem 1rem;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  font-size: 1rem;
  color: #fff;
  transition: all 0.2s ease;
}

input[type="email"]:focus,
input[type="text"]:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.25);
}

.btn {
  width: 100%;
  padding: 0.75rem 1.25rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  text-decoration: none;
  transition: all 0.2s ease;
}

.btn-primary {
  background-color: var(--primary);
  color: white;
}

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

.btn-secondary {
  background-color: var(--bg-surface-elevated);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
}

.btn-secondary:hover {
  background-color: #334155;
}

.alert {
  padding: 0.75rem 1rem;
  border-radius: 8px;
  margin-bottom: 1.25rem;
  font-size: 0.875rem;
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}

.alert-danger {
  background-color: rgba(239, 68, 68, 0.12);
  border: 1px solid rgba(239, 68, 68, 0.25);
  color: #fca5a5;
}

.alert-success {
  background-color: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.25);
  color: #6ee7b7;
}

.tab-nav {
  display: flex;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 1.5rem;
  gap: 0.5rem;
}

.tab-btn {
  flex: 1;
  background: none;
  border: none;
  padding: 0.75rem 0.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  transition: all 0.2s ease;
}

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

.tab-panel {
  display: none;
}

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

.qr-box {
  background: #ffffff;
  padding: 1rem;
  border-radius: 12px;
  display: inline-block;
  margin: 1rem auto;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

.qr-box img {
  display: block;
  width: 200px;
  height: 200px;
}

.secret-code {
  background-color: var(--bg-surface-elevated);
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  font-family: monospace;
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  color: var(--accent);
  word-break: break-all;
  user-select: all;
}

.yubikey-box {
  text-align: center;
  padding: 1.5rem 1rem;
  background: rgba(30, 41, 59, 0.5);
  border: 1px dashed var(--border-subtle);
  border-radius: 12px;
  margin-bottom: 1.25rem;
}

.yubikey-icon {
  font-size: 2.75rem;
  margin-bottom: 0.75rem;
}

.portal-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
}

.site-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
  max-width: 1000px;
  margin: 2rem auto;
  padding: 0 1.5rem;
}

.site-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.2s, border-color 0.2s;
}

.site-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
}