:root {
  --bg-dark: #0b0f19;
  --card-bg: #111827;
  --card-border: #1f2937;
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --accent: #10b981;
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --text-code: #60a5fa;
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.1);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

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

body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-sans);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  padding: 2rem 1rem;
}

.app-container {
  width: 100%;
  max-width: 800px;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

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

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

.logo-icon {
  font-size: 2rem;
  color: var(--primary);
  font-weight: bold;
}

.brand h1 {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand .subtext {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.system-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  background: var(--card-bg);
  padding: 0.4rem 0.8rem;
  border-radius: 9999px;
  border: 1px solid var(--card-border);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.status-dot.online {
  background-color: var(--accent);
  box-shadow: 0 0 8px var(--accent);
}

.card {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
}

.card h2 {
  font-size: 1.15rem;
  margin-bottom: 0.35rem;
}

.card-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

.search-form .input-wrapper {
  display: flex;
  gap: 0.5rem;
}

input[type="text"] {
  flex: 1;
  background-color: var(--bg-dark);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text-main);
  outline: none;
  transition: border-color 0.2s;
}

input[type="text"]:focus {
  border-color: var(--primary);
}

.btn {
  border: none;
  border-radius: 8px;
  padding: 0.75rem 1.25rem;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: all 0.2s;
}

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

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

.sample-actions {
  margin-top: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.btn-chip {
  background: var(--bg-dark);
  border: 1px solid var(--card-border);
  color: var(--text-code);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.25rem 0.6rem;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s;
}

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

.alert {
  padding: 0.75rem 1rem;
  border-radius: 8px;
  font-size: 0.85rem;
  margin-top: 1rem;
}

.alert-error {
  background: var(--danger-bg);
  border: 1px solid var(--danger);
  color: #fca5a5;
}

.hidden {
  display: none !important;
}

.result-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--card-border);
}

.badge {
  background: rgba(59, 130, 246, 0.15);
  color: var(--text-code);
  font-size: 0.75rem;
  padding: 0.25rem 0.6rem;
  border-radius: 9999px;
  border: 1px solid rgba(59, 130, 246, 0.3);
}

.badge-eoa {
  background: rgba(16, 185, 129, 0.15);
  color: #10b981;
  border-color: rgba(16, 185, 129, 0.3);
}

.badge-contract {
  background: rgba(168, 85, 247, 0.15);
  color: #c084fc;
  border-color: rgba(168, 85, 247, 0.3);
}

.field-group {
  margin-bottom: 1rem;
}

.field-group label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.address-display {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-dark);
  padding: 0.6rem 0.85rem;
  border-radius: 6px;
  border: 1px solid var(--card-border);
}

.address-display code {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-code);
  word-break: break-all;
}

.link-external {
  font-size: 0.8rem;
  color: var(--primary);
  text-decoration: none;
  white-space: nowrap;
  margin-left: 1rem;
}

.link-external:hover {
  text-decoration: underline;
}

.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1.25rem 0;
}

.stat-item {
  background: var(--bg-dark);
  padding: 1rem;
  border-radius: 8px;
  border: 1px solid var(--card-border);
}

.stat-label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
}

.stat-value .unit {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
}

.sub-stat {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: normal;
  padding-top: 0.35rem;
}

.raw-json-container {
  background: var(--bg-dark);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
}

.raw-json-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.code-pill {
  font-family: var(--font-mono);
  color: var(--text-code);
}

pre {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-main);
  overflow-x: auto;
}

.footer {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
  padding-top: 1rem;
  border-top: 1px solid var(--card-border);
}

.footer-links a {
  color: var(--primary);
  text-decoration: none;
}

.footer-links a:hover {
  text-decoration: underline;
}

.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* Authentication Header & Card Styles */
.header-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

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

.auth-badge {
  font-size: 0.75rem;
  background: rgba(16, 185, 129, 0.15);
  color: #10b981;
  padding: 0.25rem 0.6rem;
  border-radius: 9999px;
  font-weight: 500;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-main);
  border: 1px solid var(--card-border);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
}

.btn-sm {
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
}

.auth-card {
  text-align: center;
  padding: 2.5rem 2rem;
  border: 1px solid rgba(99, 102, 241, 0.3);
  background: linear-gradient(180deg, rgba(30, 41, 59, 0.9) 0%, rgba(15, 23, 42, 0.95) 100%);
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(99, 102, 241, 0.1);
}

.auth-icon {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
}