.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(10px);
  background: color-mix(in srgb, var(--surface-0) 88%, transparent);
  border-bottom: var(--border);
}

.site-header__row,
.footer-grid,
.toolbar,
.form-grid,
.metrics-grid,
.card-grid,
.faq-grid,
.reference-grid,
.output-grid,
.band-grid {
  display: grid;
  gap: var(--space-4);
}

.site-header__row {
  grid-template-columns: auto 1fr auto;
  align-items: center;
  min-height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-heading);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand__logo {
  width: 44px;
  height: 44px;
  object-fit: contain;
  flex: 0 0 auto;
  filter: drop-shadow(0 4px 10px rgba(0, 0, 0, 0.25));
}

.site-nav {
  display: none;
  justify-content: center;
  gap: var(--space-5);
}

.site-nav a,
.drawer a,
.footer-link {
  color: var(--text-1);
}

.site-nav a:hover,
.drawer a:hover,
.footer-link:hover,
.button:hover,
.link-button:hover {
  color: var(--text-0);
}

.controls {
  display: flex;
  gap: var(--space-2);
  align-items: center;
}

.menu-button,
.icon-button,
.button,
.link-button,
.tap-button {
  border: var(--border);
  border-radius: var(--radius-m);
  background: var(--surface-1);
  color: var(--text-0);
  cursor: pointer;
  transition: background-color 160ms ease, border-color 160ms ease, color 160ms ease, transform 160ms ease;
}

.menu-button,
.icon-button {
  width: 44px;
  height: 44px;
  display: inline-grid;
  place-items: center;
}

.icon-button {
  position: relative;
}

.icon-button svg {
  width: 20px;
  height: 20px;
  display: block;
}

.icon-button .theme-icon__sun-rays {
  opacity: 0.95;
}

.button,
.link-button {
  padding: 0 var(--space-4);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
}

.button--accent,
.tap-button {
  background: var(--accent-soft);
  border-color: rgba(242, 165, 68, 0.3);
  color: var(--accent-strong);
}

.button--small,
.link-button--small,
.filter-chip,
.badge {
  min-height: 32px;
  padding: 0 var(--space-3);
  border-radius: var(--radius-s);
  font-size: 0.875rem;
}

.button--small,
.link-button--small,
.filter-chip {
  border: var(--border);
  background: var(--surface-2);
  color: var(--text-1);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.filter-chip {
  cursor: pointer;
}

.filter-chip.is-active {
  background: var(--accent-soft);
  border-color: rgba(242, 165, 68, 0.3);
  color: var(--accent-strong);
}

.badge {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text-2);
  display: inline-flex;
  align-items: center;
}

.tap-button {
  min-height: 64px;
  width: 100%;
  font-size: 1.125rem;
  font-weight: 700;
}

.menu-button {
  display: inline-grid;
}

.menu-button span,
.menu-button::before,
.menu-button::after {
  content: "";
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
  display: block;
}

.menu-button {
  gap: 3px;
}

.drawer-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  opacity: 0;
  pointer-events: none;
  transition: opacity 180ms ease;
}

.drawer {
  position: fixed;
  inset: 0 0 0 auto;
  width: min(88vw, 320px);
  background: var(--surface-1);
  border-left: var(--border);
  padding: var(--space-8) var(--space-4);
  transform: translateX(100%);
  transition: transform 180ms ease;
  display: grid;
  align-content: start;
  gap: var(--space-4);
}

body[data-drawer-open="true"] .drawer-backdrop {
  opacity: 1;
  pointer-events: auto;
}

body[data-drawer-open="true"] .drawer {
  transform: translateX(0);
}

.panel,
.card,
.ad-slot,
.tool-shell,
.info-block,
.faq-item,
.table-wrap {
  background: var(--surface-1);
  border: var(--border);
  border-radius: var(--radius-l);
  box-shadow: var(--shadow-soft);
}

.panel,
.card,
.tool-shell,
.info-block,
.faq-item,
.table-wrap {
  padding: var(--space-5);
}

.hero {
  display: grid;
  gap: var(--space-4);
}

.tool-card__meta,
.tool-shortcuts {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.tool-shortcuts {
  padding: var(--space-4);
  border: var(--border);
  border-radius: var(--radius-m);
  background: color-mix(in srgb, var(--surface-2) 92%, transparent);
}

.tool-shortcuts__label {
  width: 100%;
  color: var(--text-2);
  font-size: 0.875rem;
}

.eyebrow {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-strong);
}

.headline,
.section-title,
.display {
  font-family: var(--font-heading);
  line-height: 1.1;
}

.headline {
  font-size: clamp(2rem, 4vw, 3.5rem);
}

.section-title {
  font-size: 1.35rem;
}

.display {
  font-size: clamp(2.5rem, 8vw, 5rem);
}

.form-grid {
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.field {
  display: grid;
  gap: var(--space-2);
}

.field label,
.fieldset legend,
.metric__label {
  color: var(--text-1);
  font-size: 0.95rem;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 0 var(--space-3);
  min-height: 44px;
  border-radius: var(--radius-s);
  border: var(--border);
  background: var(--surface-2);
  color: var(--text-0);
}

.copy-stack {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.fieldset {
  border: 0;
  padding: 0;
  margin: 0;
  display: grid;
  gap: var(--space-2);
}

.segmented {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.segmented button[aria-pressed="true"],
.table-row.is-active,
.card.is-active {
  border-color: rgba(242, 165, 68, 0.4);
  background: color-mix(in srgb, var(--accent-soft) 60%, var(--surface-1));
}

.metrics-grid,
.output-grid,
.reference-grid,
.band-grid,
.faq-grid,
.card-grid {
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.metric,
.band,
.faq-item {
  display: grid;
  gap: var(--space-2);
}

.metric__value {
  font-size: 1.6rem;
  font-weight: 700;
  font-family: var(--font-heading);
}

.bar,
.meter,
.gauge-track {
  width: 100%;
  height: 12px;
  background: var(--surface-2);
  border-radius: 999px;
  overflow: hidden;
}

.bar > span,
.meter > span,
.gauge-track > span {
  display: block;
  height: 100%;
  background: var(--accent);
}

.ad-slot {
  padding: var(--space-4);
  border-style: dashed;
  box-shadow: none;
}

.ad-slot__label {
  color: var(--text-2);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.sidebar-ad {
  display: none;
}

.table {
  width: 100%;
  border-collapse: collapse;
}

.table th,
.table td {
  text-align: left;
  padding: var(--space-3);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.table button {
  min-height: 36px;
}

.table-row {
  cursor: pointer;
}

.tooltip {
  border-bottom: 1px dotted var(--text-2);
  cursor: help;
}

.footer {
  padding: var(--space-8) 0;
  border-top: var(--border);
}

.footer-grid {
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.sticky {
  position: sticky;
  top: 96px;
}

.visual-grid {
  display: grid;
  gap: var(--space-2);
}

.visual-grid__line {
  position: relative;
  height: 28px;
  border-radius: var(--radius-s);
  background: var(--surface-2);
}

.visual-grid__marker,
.visual-grid__swing {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--text-1);
}

.visual-grid__swing {
  background: var(--accent);
}

.gauge {
  position: relative;
  height: 20px;
}

.gauge-needle {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--accent);
  left: 50%;
}

.mono {
  font-variant-numeric: tabular-nums;
}

@media (min-width: 760px) {
  .site-nav {
    display: flex;
  }

  .menu-button {
    display: none;
  }
}

@media (min-width: 960px) {
  .sidebar-ad {
    display: block;
  }
}