.icon-button,
.text-button {
  border: 1px solid var(--line);
  background: var(--paper-1);
  min-height: 2.75rem;
  cursor: pointer;
  transition:
    transform var(--motion-fast) var(--ease-out),
    background var(--motion-fast) var(--ease-out),
    border-color var(--motion-fast) var(--ease-out);
}

.icon-button {
  inline-size: 2.75rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
}

.icon-button:hover,
.text-button:hover {
  border-color: var(--ink-0);
  transform: translateY(-2px);
}

.icon {
  inline-size: 1.25rem;
  block-size: 1.25rem;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.7;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 1.9rem;
  padding-inline: .65rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink-1);
  font-size: var(--text-xs);
  font-weight: 700;
}

.tag--signal {
  border-color: transparent;
  background: var(--brand-signal);
  color: #17191d;
}

.section-heading {
  display: grid;
  grid-template-columns: auto auto 1fr;
  gap: var(--space-4);
  align-items: center;
  margin-block-end: var(--space-5);
}

.section-heading h2 {
  margin: 0;
  font-size: var(--text-xl);
  letter-spacing: -.02em;
}

.section-heading__line {
  height: 1px;
  background: var(--line);
}

.section-index {
  color: var(--brand-oxide);
  font-size: var(--text-xs);
  font-weight: 900;
  letter-spacing: .08em;
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  font-weight: 800;
}

.link-arrow .icon {
  transition: transform var(--motion-fast) var(--ease-out);
}

.link-arrow:hover .icon {
  transform: translateX(-4px);
}

.theme-switch {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  min-height: 2.25rem;
  padding: .38rem .62rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper-1);
  color: var(--ink-1);
  font: inherit;
  font-size: var(--text-xs);
  font-weight: 850;
  cursor: pointer;
}
.theme-switch::before {
  content: "◐";
  color: var(--brand-oxide);
  font-size: 1rem;
}
.theme-switch:hover,
.theme-switch:focus-visible {
  border-color: var(--brand-oxide);
  color: var(--brand-oxide);
}
.theme-switch[data-theme-mode="dark"]::before { content: "●"; }
.theme-switch[data-theme-mode="auto"]::before { content: "◒"; }

/* Global interaction layer */
.reading-progress {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: 1000;
  block-size: 4px;
  pointer-events: none;
}
.reading-progress > span {
  display: block;
  inline-size: 100%;
  block-size: 100%;
  background: var(--brand-oxide);
  transform: scaleX(0);
  transform-origin: left center;
  will-change: transform;
}
[dir="rtl"] .reading-progress > span { transform-origin: right center; }

.back-to-top {
  position: fixed;
  inset-inline-end: 1rem;
  inset-block-end: 1rem;
  z-index: 90;
  inline-size: 3rem;
  block-size: 3rem;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper-1);
  color: var(--brand-deep);
  box-shadow: var(--shadow-2);
  font-size: 1.35rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(.75rem);
  transition: opacity var(--motion-normal) var(--ease-out), transform var(--motion-normal) var(--ease-out), box-shadow var(--motion-fast) var(--ease-out);
}
.back-to-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { box-shadow: 0 18px 42px rgba(23,35,45,.18); transform: translateY(-2px); }
.back-to-top:active { transform: translateY(1px) scale(.96); }

a, button {
  transition: color var(--motion-fast) var(--ease-out), background-color var(--motion-fast) var(--ease-out), border-color var(--motion-fast) var(--ease-out), transform var(--motion-fast) var(--ease-out), box-shadow var(--motion-fast) var(--ease-out);
}
button:active, .primary-action:active, .lead__cta:active { transform: scale(.97); }

@media (prefers-reduced-motion: reduce) {
  .back-to-top, a, button { transition: none !important; }
  html:focus-within { scroll-behavior: auto; }
}

/* EGYTAG responsive brand artwork */
.brand-logo,
.masthead__brand-logo,
.footer__brand-logo,
.public-brand__logo,
.public-footer__logo {
  display: inline-grid;
  align-items: center;
}
.brand-logo img,
.masthead__brand-logo img,
.footer__brand-logo img,
.public-brand__logo img,
.public-footer__logo img {
  display: block;
  inline-size: auto;
  max-inline-size: 100%;
  block-size: auto;
}
.brand-logo__dark { display: none !important; }
html[data-theme="dark"] .brand-logo__light { display: none !important; }
html[data-theme="dark"] .brand-logo__dark { display: block !important; }