/**
 * AIAppDrop — Base styles, layout, utilities
 */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-body);
  line-height: 1.55;
  color: var(--text-primary);
  background-color: var(--bg-base);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: var(--transition-theme);
}

/* Atmospheric base — restrained indigo/cyan washes */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  background:
    radial-gradient(ellipse 60% 40% at 50% -12%, rgba(99, 102, 241, 0.16), transparent 55%),
    radial-gradient(ellipse 30% 24% at 100% 0%, rgba(34, 211, 238, 0.06), transparent 50%),
    var(--bg-base);
}

[data-theme="light"] body::before {
  background:
    radial-gradient(ellipse 60% 40% at 50% -12%, rgba(99, 102, 241, 0.08), transparent 55%),
    radial-gradient(ellipse 30% 24% at 100% 0%, rgba(34, 211, 238, 0.05), transparent 50%),
    var(--bg-base);
}

img,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: var(--brand-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--brand-primary-hover);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
[tabindex]:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

ul,
ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 650;
  line-height: 1.2;
  color: var(--text-primary);
  letter-spacing: var(--tracking-tight);
}

h1 { font-size: var(--text-h1); font-weight: 700; }
h2 { font-size: var(--text-h2); }
h3 { font-size: var(--text-h3); }
h4 { font-size: var(--text-h4); }

p {
  color: var(--text-secondary);
}

code, kbd {
  font-family: var(--font-mono);
  font-size: 0.875em;
}

kbd {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 2px 6px;
  border: 1px solid var(--bg-border);
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  color: var(--text-secondary);
  font-size: 0.75rem;
  font-weight: 500;
  line-height: 1.4;
}

/* ── Layout ─────────────────────────────────────────── */

.aad-container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.aad-main {
  min-height: calc(100vh - var(--header-height) - 280px);
  padding-block: var(--space-xl);
}

.aad-main--home {
  padding-top: 0;
}

.aad-section {
  margin-bottom: var(--space-2xl);
}

.aad-section--featured {
  margin-top: var(--space-xl);
}

.aad-section__header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
}

.aad-section__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 8px;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  background: var(--wash-primary);
  border: 1px solid rgba(99, 102, 241, 0.25);
  color: var(--brand-primary-hover);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.aad-section__title {
  font-size: clamp(1.35rem, 2.5vw, 1.75rem);
  letter-spacing: var(--tracking-tight);
}

.aad-section__subtitle {
  margin-top: var(--space-xs);
  font-size: 0.9375rem;
  color: var(--text-muted);
  max-width: 48ch;
  line-height: 1.5;
}

.aad-section__link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--brand-primary-hover);
  white-space: nowrap;
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.aad-section__link:hover {
  color: var(--brand-accent);
  transform: translateX(2px);
}

/* ── Grid — 1 → 2 → 3 → 4 columns ───────────────────── */

.aad-grid {
  display: grid;
  gap: 12px;
}

.aad-grid--tools {
  grid-template-columns: 1fr;
  gap: 12px;
}

@media (min-width: 560px) {
  .aad-grid--tools {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 860px) {
  .aad-grid--tools {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1100px) {
  .aad-grid--tools {
    grid-template-columns: repeat(4, 1fr);
  }
}

.aad-grid--featured {
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .aad-grid--featured {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1000px) {
  .aad-grid--featured {
    grid-template-columns: repeat(3, 1fr);
  }
}

.aad-grid--categories {
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

@media (min-width: 720px) {
  .aad-grid--categories {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1000px) {
  .aad-grid--categories {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Category chips row */
.aad-chip-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.aad-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 32px;
  padding: 0 12px;
  border-radius: var(--radius-full);
  border: 1px solid var(--bg-border);
  background: var(--bg-surface);
  color: var(--text-secondary);
  font-size: var(--text-xs);
  font-weight: 500;
  transition:
    color var(--transition-fast),
    border-color var(--transition-fast),
    background var(--transition-fast);
}

.aad-chip:hover {
  color: var(--text-primary);
  border-color: rgba(99, 102, 241, 0.4);
  background: var(--wash-primary);
}

/* ── Hero (compact) ─────────────────────────────────── */

.aad-hero {
  position: relative;
  padding: clamp(36px, 6vw, 64px) 0 clamp(32px, 4vw, 48px);
  text-align: center;
  overflow: hidden;
  border-bottom: 1px solid var(--bg-border);
}

.aad-hero__glow {
  position: absolute;
  inset: -40% 10% auto;
  height: 85%;
  background: radial-gradient(ellipse at 50% 0%, rgba(99, 102, 241, 0.16), transparent 65%);
  pointer-events: none;
  z-index: 0;
}

.aad-hero__inner {
  position: relative;
  z-index: 1;
  max-width: 720px;
}

.aad-hero__brand {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-primary);
}

.aad-hero__brand-icon {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  display: block;
  object-fit: contain;
  border-radius: 8px;
}

.aad-hero__title {
  max-width: 18em;
  margin: 0 auto 12px;
  font-size: clamp(1.75rem, 4.2vw, 2.75rem);
  letter-spacing: var(--tracking-tighter);
  line-height: 1.12;
  color: var(--text-primary);
  font-weight: 700;
}

.aad-hero__subtitle {
  max-width: 42ch;
  margin: 0 auto 24px;
  font-size: var(--text-body);
  color: var(--text-secondary);
  line-height: 1.5;
}

.aad-hero__controls {
  display: grid;
  gap: 14px;
  justify-items: stretch;
  max-width: 560px;
  margin-inline: auto;
}

.aad-hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.aad-hero__search-trigger {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  min-height: 48px;
  padding: 0 16px;
  border: 1px solid var(--bg-border-strong);
  border-radius: var(--radius-lg);
  background: var(--bg-surface);
  color: var(--text-muted);
  font-size: var(--text-small);
  text-align: left;
  box-shadow: var(--ring-card), var(--shadow-glow);
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    color var(--transition-fast),
    background var(--transition-fast);
}

.aad-hero__search-trigger:hover {
  border-color: rgba(99, 102, 241, 0.55);
  box-shadow: var(--ring-card-hover), var(--shadow-glow);
  color: var(--text-secondary);
  background: var(--bg-elevated);
}

.aad-hero__search-trigger svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  opacity: 0.7;
}

.aad-hero__search-trigger .aad-hero__kbd {
  margin-left: auto;
  display: flex;
  gap: 4px;
}

.aad-hero__stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px 10px;
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: var(--text-2xs);
  letter-spacing: 0.01em;
  color: var(--text-muted);
}

.aad-hero__stats strong {
  color: var(--text-secondary);
  font-weight: 500;
}

/* ── Homepage: trending categories, news, explore hub ─ */

.aad-trend-cats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

@media (min-width: 640px) {
  .aad-trend-cats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1000px) {
  .aad-trend-cats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.aad-trend-cat {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border-radius: var(--radius-lg);
  background: var(--bg-surface);
  box-shadow: var(--ring-card);
  color: var(--text-primary);
  text-decoration: none;
  transition:
    transform var(--transition-fast),
    background var(--transition-fast),
    box-shadow var(--transition-fast);
}

.aad-trend-cat:hover {
  background: var(--bg-elevated);
  box-shadow: var(--ring-card-hover);
  transform: translateY(-1px);
  color: var(--text-primary);
}

.aad-trend-cat__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--bg-elevated);
  border: 1px solid var(--bg-border);
  font-size: 0.95rem;
  flex-shrink: 0;
}

.aad-trend-cat__body {
  display: grid;
  gap: 2px;
  min-width: 0;
}

.aad-trend-cat__body strong {
  font-size: 0.875rem;
  font-weight: 650;
  letter-spacing: -0.015em;
  line-height: 1.25;
}

.aad-trend-cat__body span {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--text-muted);
}

.aad-hub-grid {
  display: grid;
  gap: 10px;
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .aad-hub-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1000px) {
  .aad-hub-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.aad-hub-card {
  display: grid;
  gap: 6px;
  padding: 14px;
  border-radius: var(--radius-lg);
  background: var(--bg-surface);
  box-shadow: var(--ring-card);
  color: var(--text-primary);
  text-decoration: none;
  transition:
    transform var(--transition-fast),
    background var(--transition-fast),
    box-shadow var(--transition-fast);
}

.aad-hub-card:hover {
  transform: translateY(-1px);
  background: var(--bg-elevated);
  box-shadow: var(--ring-card-hover);
  color: var(--text-primary);
}

.aad-hub-card__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.aad-hub-card__title {
  font-size: 0.975rem;
  font-weight: 650;
  letter-spacing: -0.015em;
}

.aad-hub-card__desc {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  line-height: 1.45;
}

/* ── Homepage: Start with a use case (interactive explorer) ─ */

.aad-section--usecase {
  position: relative;
}

.aad-usecase {
  --usecase-accent: #6366f1;
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr;
  padding: 14px;
  border: 1px solid var(--bg-border);
  border-radius: calc(var(--radius-xl) + 2px);
  background:
    radial-gradient(120% 80% at 0% 0%, color-mix(in srgb, var(--usecase-accent) 16%, transparent), transparent 55%),
    linear-gradient(180deg, color-mix(in srgb, var(--bg-surface) 92%, var(--usecase-accent)) 0%, var(--bg-surface) 48%);
  box-shadow: var(--shadow-card);
}

@media (min-width: 900px) {
  .aad-usecase {
    grid-template-columns: minmax(220px, 0.92fr) minmax(0, 1.6fr);
    gap: 16px;
    padding: 16px;
    min-height: 420px;
  }
}

.aad-usecase__rail {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 2px;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

@media (min-width: 900px) {
  .aad-usecase__rail {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
  }
}

.aad-usecase__tab {
  --tab-accent: #6366f1;
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  min-width: 148px;
  padding: 10px 12px;
  border: 1px solid var(--bg-border);
  border-radius: var(--radius-lg);
  background: color-mix(in srgb, var(--bg-elevated) 70%, transparent);
  color: var(--text-primary);
  text-align: left;
  cursor: pointer;
  scroll-snap-align: start;
  transition:
    border-color var(--transition-fast),
    background var(--transition-fast),
    transform var(--transition-fast),
    box-shadow var(--transition-fast);
}

@media (min-width: 900px) {
  .aad-usecase__tab {
    min-width: 0;
    width: 100%;
  }
}

.aad-usecase__tab[data-accent="indigo"] { --tab-accent: #6366f1; }
.aad-usecase__tab[data-accent="cyan"] { --tab-accent: #22d3ee; }
.aad-usecase__tab[data-accent="rose"] { --tab-accent: #fb7185; }
.aad-usecase__tab[data-accent="amber"] { --tab-accent: #fbbf24; }
.aad-usecase__tab[data-accent="green"] { --tab-accent: #34d399; }
.aad-usecase__tab[data-accent="slate"] { --tab-accent: #94a3b8; }

.aad-usecase__tab:hover {
  border-color: color-mix(in srgb, var(--tab-accent) 55%, var(--bg-border));
  transform: translateY(-1px);
}

.aad-usecase__tab:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--tab-accent) 70%, white);
  outline-offset: 2px;
}

.aad-usecase__tab.is-active {
  border-color: color-mix(in srgb, var(--tab-accent) 65%, var(--bg-border));
  background: color-mix(in srgb, var(--bg-surface) 78%, var(--tab-accent));
  box-shadow: inset 3px 0 0 var(--tab-accent);
}

.aad-usecase__tab-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: -0.04em;
  color: var(--tab-accent);
  background: color-mix(in srgb, var(--bg-elevated) 80%, var(--tab-accent));
  border: 1px solid color-mix(in srgb, var(--tab-accent) 28%, var(--bg-border));
}

.aad-usecase__tab-text {
  display: grid;
  gap: 1px;
  min-width: 0;
}

.aad-usecase__tab-text strong {
  font-size: 0.875rem;
  font-weight: 650;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.aad-usecase__tab-text span {
  font-size: 0.72rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.aad-usecase__stage {
  min-width: 0;
  border: 1px solid var(--bg-border);
  border-radius: var(--radius-xl);
  background: color-mix(in srgb, var(--bg-elevated) 55%, var(--bg-surface));
  overflow: hidden;
}

.aad-usecase__stage.is-switching .aad-usecase__panel {
  opacity: 0;
  transform: translateY(6px);
}

.aad-usecase__stage.is-in .aad-usecase__panel {
  animation: aad-usecase-in 0.28s ease both;
}

@keyframes aad-usecase-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.aad-usecase__panel {
  --panel-accent: #6366f1;
  display: grid;
  gap: 20px;
  padding: clamp(16px, 2.5vw, 24px);
}

.aad-usecase__panel[data-accent="indigo"] { --panel-accent: #6366f1; }
.aad-usecase__panel[data-accent="cyan"] { --panel-accent: #22d3ee; }
.aad-usecase__panel[data-accent="rose"] { --panel-accent: #fb7185; }
.aad-usecase__panel[data-accent="amber"] { --panel-accent: #fbbf24; }
.aad-usecase__panel[data-accent="green"] { --panel-accent: #34d399; }
.aad-usecase__panel[data-accent="slate"] { --panel-accent: #94a3b8; }

.aad-usecase__panel-top {
  display: grid;
  gap: 10px;
  max-width: 46ch;
}

.aad-usecase__badge {
  justify-self: start;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--panel-accent) 85%, white);
  padding: 4px 8px;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--panel-accent) 35%, var(--bg-border));
  background: color-mix(in srgb, var(--panel-accent) 14%, transparent);
}

.aad-usecase__panel-title {
  margin: 0;
  font-size: clamp(1.35rem, 2.4vw, 1.75rem);
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.aad-usecase__panel-blurb {
  margin: 0;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.55;
}

.aad-usecase__cta {
  justify-self: start;
  margin-top: 4px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.aad-usecase__path {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .aad-usecase__path {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.aad-usecase__step {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 10px;
  padding: 12px 12px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--bg-border);
  background: var(--bg-surface);
  color: var(--text-primary);
  text-decoration: none;
  transition: border-color var(--transition-fast), transform var(--transition-fast), background var(--transition-fast);
}

.aad-usecase__step:hover {
  border-color: color-mix(in srgb, var(--panel-accent) 50%, var(--bg-border));
  background: color-mix(in srgb, var(--bg-surface) 86%, var(--panel-accent));
  transform: translateY(-1px);
  color: var(--text-primary);
}

.aad-usecase__step-num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--panel-accent);
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: color-mix(in srgb, var(--panel-accent) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--panel-accent) 28%, var(--bg-border));
}

.aad-usecase__step-copy {
  display: grid;
  gap: 1px;
  min-width: 0;
}

.aad-usecase__step-copy strong {
  font-size: 0.875rem;
  font-weight: 650;
  letter-spacing: -0.015em;
}

.aad-usecase__step-copy span {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.aad-usecase__step-arrow {
  color: var(--text-muted);
  font-size: 0.95rem;
  transition: transform var(--transition-fast), color var(--transition-fast);
}

.aad-usecase__step:hover .aad-usecase__step-arrow {
  color: var(--panel-accent);
  transform: translateX(2px);
}

.aad-usecase__tools-block {
  display: grid;
  gap: 8px;
}

.aad-usecase__tools-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.aad-usecase__tools {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.aad-usecase__tool {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--bg-border);
  background: var(--bg-surface);
  color: var(--text-primary);
  text-decoration: none;
  font-size: 0.8125rem;
  font-weight: 550;
  transition: border-color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
  animation: aad-usecase-in 0.35s ease both;
  animation-delay: calc(var(--i, 0) * 40ms);
}

.aad-usecase__tool:hover {
  border-color: color-mix(in srgb, var(--panel-accent) 55%, var(--bg-border));
  background: color-mix(in srgb, var(--bg-surface) 84%, var(--panel-accent));
  transform: translateY(-1px);
  color: var(--text-primary);
}

.aad-usecase__tool-go {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.aad-usecase__tool:hover .aad-usecase__tool-go {
  color: var(--panel-accent);
}

@media (prefers-reduced-motion: reduce) {
  .aad-usecase__tab,
  .aad-usecase__step,
  .aad-usecase__tool,
  .aad-usecase__stage.is-in .aad-usecase__panel {
    animation: none;
    transition: none;
    transform: none;
  }
}

/* Soft CTA band */
.aad-cta-band {
  text-align: center;
  padding: clamp(36px, 5vw, 56px) var(--space-lg);
  background:
    radial-gradient(ellipse at 50% 0%, rgba(99, 102, 241, 0.12), transparent 55%),
    var(--bg-surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--ring-card);
}

.aad-cta-band__lead {
  margin-inline: auto;
  margin-bottom: var(--space-lg);
  max-width: 36ch;
}

.aad-cta-band__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

/* Home ad slots sit between sections with calm spacing */
.aad-main--home .aad-ad {
  margin: 0 0 var(--space-2xl);
}

/* ── Ad slots (CLS-safe reserved space) ──────────────── */

.aad-ad {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: var(--space-xl) 0;
  border: 1px dashed var(--bg-border);
  border-radius: var(--radius-md);
  background: var(--bg-surface);
  color: var(--text-muted);
  font-size: 0.75rem;
  font-family: var(--font-mono);
  overflow: hidden;
  /* Reserve space before ads fill — protects CLS */
  contain: layout;
}

.aad-ad--leaderboard {
  min-height: 90px;
  width: 100%;
  aspect-ratio: 970 / 90;
  max-height: 120px;
}

@media (max-width: 719px) {
  .aad-ad--leaderboard {
    aspect-ratio: auto;
    min-height: 100px;
    max-height: 280px;
  }
}

.aad-ad--rectangle {
  min-height: 250px;
  width: 100%;
  max-width: 336px;
}

.aad-ad--infeed {
  min-height: 120px;
  grid-column: 1 / -1;
}

.aad-ad--live {
  border-style: solid;
  border-color: var(--bg-border);
  color: transparent;
}

.aad-ad--live > span {
  display: none;
}

.aad-ad--anchor {
  display: none;
}

@media (max-width: 767px) {
  .aad-ad--anchor {
    display: flex;
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 40;
    margin: 0;
    min-height: 56px;
    max-height: 100px;
    border-radius: 0;
    border-left: none;
    border-right: none;
    border-bottom: none;
    background: var(--bg-elevated);
    box-shadow: 0 -8px 24px rgba(0, 0, 0, 0.35);
  }

  body:has(.aad-ad--anchor) {
    padding-bottom: 72px;
  }
}

.aad-ad__label {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Content-visibility for long tool grids (perf) */
.aad-grid--tools,
.aad-grid--featured {
  content-visibility: auto;
  contain-intrinsic-size: auto 480px;
}

/* ── Utilities ──────────────────────────────────────── */

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }

.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mb-lg { margin-bottom: var(--space-lg); }

/* Skip link */
.aad-skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  z-index: 1000;
  padding: var(--space-sm) var(--space-md);
  background: var(--brand-primary);
  color: white;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.875rem;
}

.aad-skip-link:focus {
  top: var(--space-sm);
  color: white;
  box-shadow: var(--focus-ring);
}

/* Floating back-to-top */
.aad-scroll-top {
  position: fixed;
  right: max(16px, env(safe-area-inset-right, 0px));
  bottom: max(20px, env(safe-area-inset-bottom, 0px));
  z-index: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  border: 1px solid var(--bg-border-strong);
  background: var(--bg-elevated);
  color: var(--text-primary);
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  pointer-events: none;
  transition:
    opacity var(--transition-base),
    visibility var(--transition-base),
    transform var(--transition-base),
    background var(--transition-fast),
    border-color var(--transition-fast),
    color var(--transition-fast);
}

.aad-scroll-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}

.aad-scroll-top:hover {
  background: var(--brand-primary);
  border-color: var(--brand-primary);
  color: #fff;
}

.aad-scroll-top:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

@media (prefers-reduced-motion: reduce) {
  .aad-scroll-top {
    transition: none;
  }
}