:root {
  color-scheme: light dark;
  --color-canvas: #f8fafc;
  --color-surface: #ffffff;
  --color-surface-muted: #f1f5f9;
  --color-text: #0f172a;
  --color-text-muted: #475569;
  --color-border: #e2e8f0;
  --color-border-strong: #cbd5e1;
  --color-action: #4f46e5;
  --color-action-hover: #4338ca;
  --color-focus: #818cf8;
  --color-success: #047857;
  --color-success-surface: #ecfdf5;
  --color-error: #be123c;
  --color-error-surface: #fff1f2;
  --color-logo: #c77a2c;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --radius-sm: 0.625rem;
  --radius-md: 0.875rem;
  --radius-lg: 1.25rem;
  --shadow-card: 0 20px 48px rgba(15, 23, 42, 0.08);
  --font-sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  background: var(--color-canvas);
  font-family: var(--font-sans);
}

body {
  min-width: 20rem;
  min-height: 100vh;
  margin: 0;
  color: var(--color-text);
  background: var(--color-canvas);
  -webkit-font-smoothing: antialiased;
}

button,
a {
  font: inherit;
}

button:focus-visible,
a:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
}

.page-shell {
  display: grid;
  min-height: 100vh;
  place-content: center;
  padding: var(--space-8) var(--space-4);
}

.demo-card {
  width: min(100%, 29rem);
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: var(--shadow-card);
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-6) var(--space-6) 0;
}

.brand-logo {
  width: 3.5rem;
  height: 3.5rem;
  border-radius: var(--radius-md);
}

.brand-name,
.eyebrow,
.account-name,
.account-handle,
.success-copy,
.environment-note,
.hero-copy p,
.helper-copy,
.showcase-header p {
  margin: 0;
}

.brand-name {
  font-size: 0.9375rem;
  font-weight: 700;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-1);
  color: var(--color-text-muted);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.status-dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 999px;
  background: var(--color-success);
}

.hero-copy {
  padding: var(--space-8) var(--space-6) var(--space-6);
}

.hero-copy h1,
.showcase-header h1 {
  margin: 0;
  font-size: clamp(1.65rem, 7vw, 2rem);
  line-height: 1.18;
  letter-spacing: -0.035em;
}

.hero-copy p,
.showcase-header p {
  margin-top: var(--space-3);
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  line-height: 1.65;
}

.notice {
  margin: 0 var(--space-6) var(--space-5);
  padding: var(--space-3) var(--space-4);
  border: 1px solid color-mix(in srgb, var(--color-error) 22%, transparent);
  border-radius: var(--radius-sm);
  color: var(--color-error);
  background: var(--color-error-surface);
  font-size: 0.875rem;
  line-height: 1.5;
}

.state-panel {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  min-height: 6.5rem;
  padding: var(--space-6);
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

.spinner {
  width: 1.25rem;
  height: 1.25rem;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-action);
  border-radius: 999px;
  animation: spin 700ms linear infinite;
}

.auth-state {
  padding: 0 var(--space-6) var(--space-6);
}

.primary-button,
.secondary-button {
  display: inline-flex;
  width: 100%;
  min-height: 3rem;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 150ms ease-out, border-color 150ms ease-out, opacity 150ms ease-out;
}

.primary-button {
  border: 1px solid var(--color-action);
  color: #ffffff;
  background: var(--color-action);
}

.primary-button:hover {
  background: var(--color-action-hover);
  border-color: var(--color-action-hover);
}

.primary-button img {
  border-radius: 0.375rem;
}

.secondary-button {
  border: 1px solid var(--color-border-strong);
  color: var(--color-text);
  background: var(--color-surface);
}

.secondary-button:hover {
  background: var(--color-surface-muted);
}

.primary-button:disabled,
.secondary-button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.helper-copy {
  margin-top: var(--space-3);
  color: var(--color-text-muted);
  font-size: 0.75rem;
  line-height: 1.55;
  text-align: center;
}

.account-card {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  background: var(--color-surface-muted);
}

.account-avatar {
  width: 3rem;
  height: 3rem;
  flex: none;
  border-radius: 999px;
  object-fit: cover;
}

.account-copy {
  min-width: 0;
  flex: 1;
}

.account-name,
.account-handle {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.account-name {
  font-size: 0.9375rem;
  font-weight: 700;
}

.account-handle {
  margin-top: var(--space-1);
  color: var(--color-text-muted);
  font-size: 0.75rem;
}

.verified-badge {
  padding: var(--space-1) var(--space-2);
  border-radius: 999px;
  color: var(--color-success);
  background: var(--color-success-surface);
  font-size: 0.6875rem;
  font-weight: 800;
  letter-spacing: 0.05em;
}

.success-copy {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  margin: var(--space-4) 0;
  color: var(--color-success);
  font-size: 0.8125rem;
  font-weight: 600;
}

.trust-panel {
  padding: var(--space-5) var(--space-6) var(--space-6);
  border-top: 1px solid var(--color-border);
  background: var(--color-surface-muted);
}

.trust-panel h2 {
  margin: 0;
  font-size: 0.8125rem;
}

.trust-panel ul {
  display: grid;
  gap: var(--space-3);
  margin: var(--space-4) 0 0;
  padding: 0;
  color: var(--color-text-muted);
  font-size: 0.8125rem;
  line-height: 1.45;
  list-style: none;
}

.trust-panel li {
  display: flex;
  gap: var(--space-2);
}

.trust-panel li > span:first-child {
  color: var(--color-action);
  font-weight: 800;
}

.environment-note {
  width: min(100%, 29rem);
  margin-top: var(--space-4);
  color: var(--color-text-muted);
  font-size: 0.75rem;
  line-height: 1.5;
  text-align: center;
}

.showcase-shell {
  width: min(100% - 2rem, 66rem);
  margin: 0 auto;
  padding: var(--space-10) 0;
}

.showcase-header {
  max-width: 38rem;
}

.showcase-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-8);
}

.showcase-group {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: var(--space-4);
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
}

.showcase-group h2 {
  margin: 0;
  font-size: 1rem;
}

.showcase-group .notice {
  margin: 0;
}

.showcase-group .state-panel {
  min-height: 4rem;
  padding: var(--space-3);
}

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

@media (max-width: 63.99rem) {
  .showcase-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 47.99rem) {
  .page-shell {
    place-content: start center;
    padding-top: var(--space-5);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-canvas: #09090b;
    --color-surface: #18181b;
    --color-surface-muted: #27272a;
    --color-text: #fafafa;
    --color-text-muted: #a1a1aa;
    --color-border: #27272a;
    --color-border-strong: #3f3f46;
    --color-action: #6366f1;
    --color-action-hover: #818cf8;
    --color-success: #6ee7b7;
    --color-success-surface: rgba(16, 185, 129, 0.13);
    --color-error: #fda4af;
    --color-error-surface: rgba(159, 18, 57, 0.22);
    --shadow-card: none;
  }
}