/* ── Floating capsule header: live sound-ring logo, centred links with a sliding indicator,
      scroll-spy, reading-progress line, and a tidy menu on phones ── */
:root { --header-h: 78px; }
.site-header { position: sticky; inset-block-start: 0; z-index: 60; padding-block-start: 12px; background: none; -webkit-backdrop-filter: none; backdrop-filter: none; border: 0; pointer-events: none; }
.site-header .nav {
  pointer-events: auto; position: relative; display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 10px;
  block-size: 62px; padding-inline: 10px 8px; border-radius: 22px;
  background: color-mix(in srgb, var(--bg) 64%, transparent);
  -webkit-backdrop-filter: saturate(1.6) blur(20px); backdrop-filter: saturate(1.6) blur(20px);
  border: 1px solid var(--line-2);
  box-shadow: 0 18px 50px -28px rgba(0, 0, 0, .95), inset 0 1px 0 rgba(255, 255, 255, .06);
  transition: inline-size .5s cubic-bezier(.2, .8, .2, 1), block-size .35s ease, background-color .35s ease, box-shadow .35s ease;
}
/* hairline that glows orange in the middle of the capsule's top edge */
.site-header .nav::before { content: ""; position: absolute; inset-block-start: -1px; inset-inline: 18%; block-size: 1px; border-radius: 1px; pointer-events: none;
  background: linear-gradient(90deg, transparent, rgba(255, 106, 0, .7), transparent); opacity: .55; }
/* reading progress along the bottom edge */
.site-header .nav::after { content: ""; position: absolute; inset-block-end: -1px; inset-inline: 22px; block-size: 2px; border-radius: 2px; pointer-events: none;
  background: linear-gradient(90deg, var(--orange-deep), var(--orange)); transform: scaleX(var(--read, 0)); transform-origin: left; opacity: .9; }
[dir="rtl"] .site-header .nav::after { transform-origin: right; }
.site-header.is-scrolled .nav { block-size: 56px; background: color-mix(in srgb, var(--bg) 82%, transparent); box-shadow: 0 22px 60px -26px rgba(0, 0, 0, 1), inset 0 1px 0 rgba(255, 255, 255, .06); }

/* brand */
.site-header .brand { margin: 0; gap: 10px; padding-inline: 4px 8px; border-radius: 16px; }
.site-header .brand-mark { inline-size: 40px; block-size: 40px; overflow: visible; transition: transform .5s cubic-bezier(.3, 1.4, .5, 1); }
.site-header .brand:hover .brand-mark { transform: rotate(-12deg) scale(1.06); }
.site-header .brand-name { font-size: 1.3rem; font-weight: 700; letter-spacing: 0; }
.site-header .brand-name small { font-size: .56rem; letter-spacing: .28em; margin-block-start: 6px; color: var(--faint); }
.brand-eq line { stroke-linecap: round; }
.brand-eq .o { stroke: var(--orange); }
.brand-eq .l { stroke: var(--ring-light); }
.brand-eq circle { fill: var(--orange); transform-origin: 256px 256px; }

/* links */
.site-header .nav-links { display: none; position: relative; align-items: center; gap: 0; padding: 4px; margin: 0; list-style: none; border-radius: 999px;
  background: color-mix(in srgb, var(--surface) 55%, transparent); border: 1px solid var(--line); }
.site-header .nav-links li { position: relative; z-index: 1; }
.site-header .nav-links a { min-block-size: 40px; padding-inline: 16px; font-size: .93rem; font-weight: 500; color: var(--muted); background: none; border-radius: 999px; transition: color .25s ease; }
.site-header .nav-links a:hover, .site-header .nav-links a.is-active { color: var(--text); background: none; }
.site-header .nav-links a.is-active { font-weight: 600; }
.nav-ind { position: absolute; inset-block: 4px; left: 0; inline-size: 0; border-radius: 999px; pointer-events: none; opacity: 0;
  background: linear-gradient(180deg, rgba(255, 106, 0, .2), rgba(255, 106, 0, .1)); box-shadow: inset 0 0 0 1px rgba(255, 106, 0, .5), 0 6px 20px -8px rgba(255, 106, 0, .6);
  transition: transform .5s cubic-bezier(.3, 1.25, .5, 1), inline-size .5s cubic-bezier(.3, 1.25, .5, 1), opacity .3s ease; }
.nav-ind.on { opacity: 1; }
.nav-ind::after { content: ""; position: absolute; inset-block-end: -5px; left: 50%; inline-size: 4px; block-size: 4px; margin-inline-start: -2px; border-radius: 50%; background: var(--orange); box-shadow: 0 0 8px var(--orange); }

/* end group */
.nav-end { display: flex; align-items: center; justify-content: flex-end; gap: 8px; }
.site-header .lang-switch { min-block-size: 42px; padding-inline: 14px; font-size: .88rem; font-weight: 600; border-color: var(--line-2); background: color-mix(in srgb, var(--surface) 40%, transparent); }
.site-header .lang-switch:hover { border-color: rgba(255, 106, 0, .5); background: color-mix(in srgb, var(--surface) 70%, transparent); }
.site-header .nav-end .btn-primary { position: relative; overflow: hidden; min-block-size: 42px; padding-inline: 18px; border-radius: 14px; font-weight: 700; }

/* phone menu */
.nav-menu { display: inline-grid; place-content: center; gap: 5px; inline-size: 44px; block-size: 44px; border-radius: 14px; border: 1px solid var(--line-2); background: color-mix(in srgb, var(--surface) 40%, transparent); cursor: pointer; padding: 0; }
.nav-menu span { display: block; inline-size: 18px; block-size: 2px; border-radius: 2px; background: var(--text); transition: transform .35s ease, opacity .25s ease; }
.menu-open .nav-menu span:first-child { transform: translateY(3.5px) rotate(45deg); }
.menu-open .nav-menu span:last-child { transform: translateY(-3.5px) rotate(-45deg); }
@media (max-width: 1039px) {
  .site-header .nav-links { position: absolute; inset-block-start: calc(100% + 10px); inset-inline: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 6px; padding: 10px;
    border-radius: 22px; border: 1px solid var(--line-2); background: var(--bg-2);
    -webkit-backdrop-filter: blur(20px); backdrop-filter: blur(20px); box-shadow: 0 30px 60px -30px rgba(0, 0, 0, .95);
    opacity: 0; visibility: hidden; transform: translateY(-8px) scale(.98); transform-origin: top; transition: opacity .25s ease, transform .35s cubic-bezier(.2, .9, .3, 1), visibility 0s .35s; }
  .menu-open .nav-links { opacity: 1; visibility: visible; transform: none; transition: opacity .25s ease, transform .35s cubic-bezier(.2, .9, .3, 1); }
  .site-header .nav-links a { display: flex; min-block-size: 52px; padding-inline: 16px; font-size: 1rem; border-radius: 14px; background: color-mix(in srgb, var(--surface) 70%, transparent); }
  .site-header .nav-links a.is-active { color: var(--accent-ink); box-shadow: inset 0 0 0 1px rgba(255, 106, 0, .45); }
  .nav-ind { display: none; }
}
@media (min-width: 1040px) {
  .site-header .nav { grid-template-columns: 1fr auto 1fr; padding-inline: 12px 10px; }
  .site-header .nav-links { display: flex; }
  .site-header.is-scrolled .nav { inline-size: min(100% - 2 * var(--gutter), 1120px); }
  .nav-menu { display: none; }
}
@media (max-width: 559px) { .site-header .nav-end .btn-primary { display: none; } .site-header .brand-name { font-size: 1.15rem; } }
@media (prefers-color-scheme: light) {
  .site-header .nav { box-shadow: 0 18px 50px -30px rgba(60, 30, 0, .45), inset 0 1px 0 rgba(255, 255, 255, .7); }
  .site-header.is-scrolled .nav { box-shadow: 0 22px 60px -30px rgba(60, 30, 0, .5), inset 0 1px 0 rgba(255, 255, 255, .7); }
  .nav-ind { background: linear-gradient(180deg, rgba(255, 106, 0, .16), rgba(255, 106, 0, .07)); }
}
@media (prefers-reduced-motion: reduce) { .site-header .nav, .nav-ind, .nav-links, .site-header .brand-mark { transition: none !important; } }
.site-header .brand-name small:lang(ar) { letter-spacing: 0; font-family: var(--font); font-size: .7rem; text-transform: none; }