:root {
  /* Superfícies — quase-preto (nunca preto puro) */
  --background: #08090a;
  --foreground: #f7f8f8;
  --card: #141516;
  --card-foreground: #f7f8f8;
  --popover: #141516;
  --popover-foreground: #f7f8f8;

  /* Acento — indigo */
  --primary: #5e6ad2;
  --primary-strong: #4c58c4;
  --primary-strong-hover: #414caf;
  --primary-foreground: #ffffff;

  /* Neutros */
  --secondary: #141516;
  --secondary-foreground: #f7f8f8;
  --muted-surface: #141516;
  --muted-foreground: #8a8f98;
  --accent-surface: #1c1d1f;
  --accent-foreground: #f7f8f8;
  --soft-foreground: #d0d6e0;

  /* Bordas em rgba (hairline), não cinza sólido */
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.12);
  --ring: #5e6ad2;

  /* Tipografia */
  --font-sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  --weight-regular: 400;
  --weight-medium: 510;
  --weight-semibold: 590;
  --tracking-tight: -0.012em;

  /* Raio — apertado; botões usam pill */
  --radius: 0.5rem;
  --radius-sm: calc(var(--radius) * 0.5);
  --radius-md: calc(var(--radius) * 0.75);
  --radius-lg: var(--radius);
  --radius-xl: calc(var(--radius) * 1.5);
  --radius-2xl: calc(var(--radius) * 2);
  --radius-pill: 9999px;

  /* Grid de 8px */
  --space-unit: 8px;

  /* Sombras em camadas sutis */
  --shadow-sm: 0 1px 1px rgba(0, 0, 0, 0.08), 0 0 1px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 4px rgba(0, 0, 0, 0.1), 0 0 0 1px rgba(0, 0, 0, 0.6);
  --shadow-inset: inset 0 0 0 1px rgba(255, 255, 255, 0.03), inset 0 1px 0 0 rgba(255, 255, 255, 0.04);
  --primary-text-shadow: none;
}

html,
body {
  font-family: var(--font-sans);
  letter-spacing: var(--tracking-tight);
  -webkit-font-smoothing: antialiased;
}

:where(a, button, summary):focus-visible {
  outline: 2px solid var(--ring);
  outline-offset: 3px;
}

.site-header-shell {
  position: fixed;
  top: 18px;
  left: 50%;
  z-index: 40;
  width: min(920px, calc(100% - 32px));
  transform: translateX(-50%);
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(4, 4, 4, 0.9);
  padding: 8px 8px 8px 16px;
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(18px);
}

.site-brand {
  display: inline-flex;
  min-width: 0;
  align-items: center;
  gap: 10px;
}

.site-header-avatar {
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
  border-radius: 999px;
  object-fit: cover;
}

.site-brand-copy {
  display: grid;
  min-width: 0;
  gap: 2px;
}

.site-brand-copy strong,
.site-brand-copy span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.site-brand-copy strong {
  color: var(--foreground);
  font-size: 0.88rem;
  line-height: 1;
}

.site-brand-copy span {
  color: var(--muted-foreground);
  font-size: 0.72rem;
}

.site-nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}

.ui-button {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  padding: 0 16px;
  background: var(--secondary);
  color: var(--secondary-foreground);
  box-shadow: var(--shadow-inset);
  font-size: 0.82rem;
  font-weight: var(--weight-semibold);
  line-height: 1;
  text-shadow: none;
  transition: background 160ms ease, border-color 160ms ease, color 160ms ease;
}

.nav a.ui-button,
.nav-links a.ui-button,
a.button.ui-button {
  border-radius: var(--radius-lg);
}

.ui-button:hover {
  border-color: #3f3f46;
  background: var(--accent-surface);
}

.ui-button-primary {
  border-color: var(--primary);
  background: var(--primary-strong);
  color: var(--primary-foreground);
  text-shadow: var(--primary-text-shadow);
}

.nav a.ui-button-primary,
.nav-links a.ui-button-primary,
a.button.ui-button-primary {
  border-color: var(--primary);
  background: var(--primary-strong);
  color: var(--primary-foreground);
  text-shadow: var(--primary-text-shadow);
}

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

.ui-button-outline {
  border-color: var(--border);
  background: transparent;
  color: var(--foreground);
}

.nav a.ui-button-outline,
.nav-links a.ui-button-outline,
a.button.ui-button-outline {
  border-color: var(--border);
  background: transparent;
  color: var(--foreground);
  text-shadow: none;
}

.ui-button-ghost {
  border-color: transparent;
  background: transparent;
  box-shadow: none;
  color: var(--muted-foreground);
}

.nav a.ui-button-ghost,
.nav-links a.ui-button-ghost {
  border-color: transparent;
  background: transparent;
  box-shadow: none;
  color: var(--muted-foreground);
  text-shadow: none;
}

.ui-button-ghost:hover {
  border-color: transparent;
  background: var(--accent-surface);
  color: var(--foreground);
}

.ui-icon {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2.15;
}

.ui-icon-button {
  display: inline-flex;
  width: 40px;
  height: 40px;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--secondary);
  color: var(--foreground);
  transition: background 160ms ease, border-color 160ms ease;
}

.ui-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  background: var(--card);
  color: var(--card-foreground);
  box-shadow: var(--shadow-sm);
}

.card.ui-card,
.card.large.ui-card {
  border-radius: var(--radius-xl);
}

.ui-card-interactive {
  transition: background 160ms ease, border-color 160ms ease;
}

.ui-card-interactive:hover {
  border-color: #3f3f46;
  background: #111113;
}

.ui-card-inverse {
  border-color: #e4e4e7;
  background: #fafafa;
  color: #09090b;
}

@media (max-width: 900px) {
  .site-header {
    border-radius: var(--radius-2xl);
    padding: 12px;
  }

  .site-nav-links a:not(.primary) {
    display: none;
  }
}

@media (max-width: 520px) {
  .site-brand-copy {
    max-width: 124px;
  }
}

.ui-badge {
  display: inline-flex;
  min-height: 28px;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0 10px;
  background: var(--secondary);
  color: var(--secondary-foreground);
  font-size: 0.74rem;
  font-weight: 800;
  line-height: 1;
}

.ui-badge-primary {
  border-color: rgba(8, 178, 210, 0.42);
  background: rgba(8, 178, 210, 0.12);
  color: #67e8f9;
}

.card .index.ui-badge {
  width: auto;
  min-width: 38px;
  height: 30px;
  margin-bottom: 34px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--secondary);
  color: var(--foreground);
}

.ui-avatar {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--secondary);
  object-fit: cover;
}

.ui-nav {
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  background: rgba(9, 9, 11, 0.9);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(18px);
}

.ui-separator {
  border-top: 1px solid var(--border);
}

.ui-accordion-item {
  overflow: clip;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--card);
}

.ui-accordion-trigger {
  position: relative;
  display: flex;
  min-height: 56px;
  align-items: center;
  padding: 0 48px 0 18px;
  list-style: none;
}

.ui-accordion-trigger::-webkit-details-marker {
  display: none;
}

.ui-accordion-trigger::after {
  content: "";
  position: absolute;
  right: 20px;
  width: 8px;
  height: 8px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: translateY(-2px) rotate(45deg);
  transition: transform 160ms ease;
}

details[open] > .ui-accordion-trigger::after {
  transform: translateY(2px) rotate(225deg);
}

.ui-link-card {
  display: grid;
  min-height: 88px;
  grid-template-columns: 42px minmax(0, 1fr) 42px;
  align-items: center;
  gap: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  background: var(--card);
  padding: 16px 18px;
}

.ui-link-card-primary {
  border-color: var(--primary);
  background: var(--primary-strong);
  color: var(--primary-foreground);
  text-shadow: var(--primary-text-shadow);
}

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

@media (max-width: 520px) {
  .ui-link-card {
    grid-template-areas:
      "icon action"
      "text text";
    grid-template-columns: minmax(0, 1fr) 40px;
    gap: 10px 12px;
    align-items: start;
  }

  .ui-link-card > .link-icon {
    grid-area: icon;
    width: 34px;
    height: 34px;
  }

  .ui-link-card > .link-text {
    grid-area: text;
  }

  .ui-link-card > .link-action {
    grid-area: action;
    align-self: center;
    justify-self: end;
  }
}