/* ==========================================================================
   Layout
   Site frame: fixed header, primary navigation (desktop bar + mobile
   full-screen overlay) and the page footer.
   ========================================================================== */

/* Header ------------------------------------------------------------------ */
.page-header { position: fixed; inset: 0 0 auto; z-index: 30; height: 76px; transition: height .4s var(--ease-out), background .3s ease, box-shadow .3s ease, border-color .3s ease; border-bottom: 1px solid transparent; }
/* Condensed while the reader is moving down the page; restored on the way up. */
.page-header.is-compact { height: 58px; }
.page-header.fixed { border-color: var(--border); background: rgba(243, 247, 248, .88); box-shadow: 0 8px 30px rgba(34, 112, 147, .07); backdrop-filter: blur(18px) saturate(135%); }
.page-header > .wrapper { display: grid; grid-template-columns: 148px 1fr auto; align-items: center; gap: clamp(1rem, 3vw, 3rem); height: 100%; }
.logo { display: inline-grid; align-items: center; justify-self: start; }
.logo img { width: 142px; height: auto; grid-area: 1 / 1; transition: width .4s var(--ease-out), opacity .32s var(--ease-out), transform .32s var(--ease-out); }
.logo-default { opacity: 1; transform: translateY(0); }
.logo-menu { opacity: 0; pointer-events: none; transform: translateY(5px); }
.page-header .actions { display: flex; align-items: center; gap: 8px; }
.page-header .actions .btn { transition: min-height .4s var(--ease-out), padding .4s var(--ease-out), color .22s ease, background .22s ease, border-color .22s ease, transform .22s var(--ease-out), box-shadow .22s ease; }

/* Navigation — desktop bar ------------------------------------------------- */
.menu-shell { display: contents; }
.menu-kicker, .menu-footer, .menu-atmosphere, .menu-index, .menu-arrow { display: none; }
.menu ul { display: flex; align-items: center; justify-content: center; gap: clamp(1rem, 2.3vw, 2rem); white-space: nowrap; }
.menu a { position: relative; padding-block: 12px; color: var(--text-muted); font-size: .875rem; font-weight: 650; cursor: pointer; transition: color .2s ease, font-size .4s var(--ease-out); }
.menu a::after { position: absolute; right: 0; bottom: 5px; left: 0; height: 2px; content: ""; background: var(--accent); transform: scaleX(0); transform-origin: right; transition: transform .25s var(--ease-out); }
.menu a:hover { color: var(--text); }
.menu a:hover::after { transform: scaleX(1); transform-origin: left; }

/* Navigation — mobile trigger ---------------------------------------------- */
.menu-trigger { display: none; width: 44px; height: 44px; align-items: center; justify-content: center; flex-direction: column; gap: 6px; border: 1px solid var(--border); border-radius: var(--radius-control); background: var(--surface-raised); cursor: pointer; transition: color .3s ease, border-color .3s ease, background .3s ease, transform .3s var(--ease-out); }
.menu-trigger span { width: 18px; height: 2px; background: currentColor; transform-origin: center; transition: transform .5s var(--ease-out), width .35s ease; }
.menu-trigger.active span:first-child { transform: translateY(4px) rotate(45deg); }
.menu-trigger.active span:last-child { transform: translateY(-4px) rotate(-45deg); }

/* Footer ------------------------------------------------------------------- */
.page-footer { position: relative; overflow: hidden; padding: clamp(5rem, 9vw, 8rem) 0 3rem; background: var(--accent-soft); }
.page-footer::after { position: absolute; right: -15vw; bottom: -50vw; width: 70vw; height: 70vw; content: ""; border: 1px solid var(--accent-border); border-radius: 50%; box-shadow: inset 0 0 0 8vw rgba(0, 168, 132, .035), inset 0 0 0 17vw rgba(0, 168, 132, .025); }
.footer-content { position: relative; z-index: 1; max-width: 880px; }
.page-footer .section-title { font-family: inherit; font-size: clamp(3rem, 5vw, 4.5rem); font-weight: 750; letter-spacing: -.035em; line-height: 1; }
.footer-description { max-width: 58ch; margin-top: 30px; color: var(--text-muted); font-size: var(--type-body); line-height: 1.65; }
.footer-description a { display: inline-block; margin-top: 8px; color: var(--accent-hover); font-weight: 750; }
.page-footer .actions { display: flex; gap: 10px; margin-top: 32px; }

/* Condensed sizing for the inline desktop bar; the overlay menu keeps its own. */
@media (min-width: 981px) {
  .page-header.is-compact .logo img { width: 116px; }
  .page-header.is-compact .menu a { font-size: .8125rem; }
  .page-header.is-compact .actions .btn { min-height: 38px; padding-inline: 16px; }
}

@media (max-width: 1180px) {
  .page-header > .wrapper { grid-template-columns: 132px 1fr auto; gap: 1rem; }
  .logo img { width: 126px; }
  .menu ul { gap: 1rem; }
  .page-header .btn.secondary { display: none; }
}

@media (max-width: 980px) {
  body.menu-open { overflow: hidden; }
  .page-header.is-compact .logo img { width: 108px; }
  .page-header > .wrapper { position: relative; z-index: 2; grid-template-columns: 1fr auto auto; }
  .page-header .logo, .page-header .actions { position: relative; z-index: 3; }
  .menu-trigger { position: relative; z-index: 4; display: flex; }
  .page-header.menu-open, .page-header.menu-closing { border-color: transparent; background: transparent; box-shadow: none; backdrop-filter: none; }
  .page-header.menu-open .logo-default { opacity: 0; transform: translateY(-5px); }
  .page-header.menu-open .logo-menu { opacity: 1; transform: translateY(0); }
  .page-header.menu-closing .logo img { transition-duration: .16s; transition-delay: .5s; }
  .page-header.menu-open .actions > .btn, .page-header.menu-closing .actions > .btn { visibility: hidden; opacity: 0; transform: translateY(-8px); }
  .page-header.menu-open .menu-trigger, .page-header.menu-closing .menu-trigger { color: #fff; border-color: rgba(255, 255, 255, .2); background: rgba(255, 255, 255, .07); box-shadow: inset 0 1px rgba(255, 255, 255, .06), 0 12px 32px rgba(0, 0, 0, .16); }
  .page-header.menu-open .menu-trigger:hover { border-color: rgba(119, 215, 194, .5); background: rgba(0, 168, 132, .16); }

  /* Full-screen overlay navigation */
  .menu { position: fixed; inset: 0; z-index: 1; visibility: hidden; height: 100dvh; overflow: hidden; color: #fff; background: #14212c; clip-path: circle(0 at calc(100% - 38px) 34px); pointer-events: none; transition: clip-path .82s cubic-bezier(.72, 0, .18, 1), visibility 0s linear .82s; }
  .menu::before { position: absolute; inset: 0; content: ""; background: radial-gradient(circle at 82% 13%, rgba(0, 168, 132, .24), transparent 28%), radial-gradient(circle at 12% 88%, rgba(34, 112, 147, .18), transparent 30%), repeating-linear-gradient(90deg, transparent 0, transparent calc(20vw - 1px), rgba(255, 255, 255, .026) calc(20vw - 1px), rgba(255, 255, 255, .026) 20vw); opacity: .8; transform: scale(1.12); transition: transform 1s var(--ease-out), opacity .55s ease; }
  .menu::after { position: absolute; right: -2vw; bottom: -4vw; content: "IONDS"; color: rgba(255, 255, 255, .025); font-size: clamp(9rem, 28vw, 18rem); font-weight: 750; letter-spacing: -.08em; line-height: .75; pointer-events: none; transform: translateY(28%) scale(.92); transition: transform 1s var(--ease-out); }
  .menu.active { visibility: visible; clip-path: circle(150vmax at calc(100% - 38px) 34px); pointer-events: auto; transition: clip-path .9s cubic-bezier(.16, 1, .3, 1), visibility 0s; }
  .menu.is-closing { pointer-events: auto; }
  .menu.active::before { opacity: 1; transform: scale(1); }
  .menu.active::after { transform: translateY(0) scale(1); }
  .menu-shell { position: relative; z-index: 2; display: grid; width: min(100%, 900px); height: 100%; grid-template-rows: auto minmax(0, 1fr) auto; gap: clamp(1rem, 3vh, 2rem); margin-inline: auto; overflow-y: auto; padding: max(6.5rem, calc(env(safe-area-inset-top) + 5.2rem)) clamp(1.25rem, 6vw, 4rem) max(1.4rem, env(safe-area-inset-bottom)); scrollbar-width: none; }
  .menu-shell::-webkit-scrollbar { display: none; }
  .menu-kicker { display: block; color: #77d7c2; font: 700 .75rem/1.3 ui-monospace, monospace; letter-spacing: .09em; text-transform: uppercase; opacity: 0; transform: translateY(16px); transition: opacity .28s ease, transform .45s var(--ease-out); }
  .menu ul { display: grid; align-content: center; gap: 0; white-space: normal; perspective: 800px; }
  .menu li { border-bottom: 1px solid rgba(255, 255, 255, .1); opacity: 0; transform: translateY(34px) rotateX(-8deg); transform-origin: left center; transition: opacity .28s ease, transform .48s var(--ease-out); }
  .menu li:first-child { border-top: 1px solid rgba(255, 255, 255, .1); }
  .menu li:nth-child(1) { transition-delay: .26s; }
  .menu li:nth-child(2) { transition-delay: .21s; }
  .menu li:nth-child(3) { transition-delay: .16s; }
  .menu li:nth-child(4) { transition-delay: .11s; }
  .menu li:nth-child(5) { transition-delay: .06s; }
  .menu.active .menu-kicker { opacity: 1; transform: translateY(0); transition-delay: .2s; }
  .menu.active li { opacity: 1; transform: translateY(0) rotateX(0); }
  .menu.active li:nth-child(1) { transition-delay: .2s; }
  .menu.active li:nth-child(2) { transition-delay: .27s; }
  .menu.active li:nth-child(3) { transition-delay: .34s; }
  .menu.active li:nth-child(4) { transition-delay: .41s; }
  .menu.active li:nth-child(5) { transition-delay: .48s; }
  .menu a { display: grid; min-height: clamp(3.8rem, 9.5vh, 5.6rem); grid-template-columns: 36px minmax(0, 1fr) auto; align-items: center; gap: clamp(10px, 2vw, 20px); padding: 0; color: #f5f8fa; font-size: clamp(2rem, 6vw, 3.5rem); font-weight: 700; letter-spacing: -.045em; line-height: .95; transition: color .25s ease; }
  .menu a::after { display: none; }
  .menu-index { display: block; align-self: start; padding-top: clamp(1rem, 2.2vh, 1.45rem); color: #77d7c2; font: 650 .6875rem/1 ui-monospace, monospace; letter-spacing: .04em; }
  .menu-label { transition: transform .35s var(--ease-out); }
  .menu-arrow { display: grid; width: 34px; height: 34px; place-items: center; color: #77d7c2; border: 1px solid rgba(119, 215, 194, .22); border-radius: 50%; font-size: .875rem; letter-spacing: 0; opacity: .72; transform: rotate(45deg) scale(.85); transition: opacity .3s ease, transform .42s var(--ease-out), background .3s ease; }
  .menu a:hover { color: #9de3d3; }
  .menu a:hover .menu-label { transform: translateX(8px); }
  .menu a:hover .menu-arrow { background: rgba(0, 168, 132, .14); opacity: 1; transform: rotate(0) scale(1); }
  .menu-footer { display: flex; align-items: flex-end; justify-content: space-between; gap: 1rem; color: #8fa2af; opacity: 0; transform: translateY(18px); transition: opacity .32s ease, transform .5s var(--ease-out); }
  .menu.active .menu-footer { opacity: 1; transform: translateY(0); transition-delay: .55s; }
  .menu-footer p { display: flex; align-items: center; gap: 9px; font-size: .75rem; line-height: 1.4; }
  .menu-footer p > span { width: 7px; height: 7px; border-radius: 50%; background: #77d7c2; box-shadow: 0 0 0 5px rgba(119, 215, 194, .09); }
  .menu-footer > a { display: inline-flex; min-height: 42px; grid-template-columns: none; align-items: center; gap: 12px; padding: 0 14px; color: #fff; border: 1px solid rgba(255, 255, 255, .16); border-radius: 10px; background: rgba(255, 255, 255, .05); font-size: .8125rem; font-weight: 700; letter-spacing: 0; line-height: 1; }
  .menu-footer > a:hover { color: #fff; border-color: rgba(119, 215, 194, .42); background: rgba(0, 168, 132, .13); }
  .menu-atmosphere { position: absolute; inset: 0; display: block; overflow: hidden; pointer-events: none; }
  .menu-atmosphere span { position: absolute; border: 1px solid rgba(119, 215, 194, .12); border-radius: 50%; opacity: 0; transform: scale(.58); transition: opacity .55s ease, transform 1.15s var(--ease-out); }
  .menu-atmosphere span:nth-child(1) { top: -16vw; right: -16vw; width: 52vw; height: 52vw; }
  .menu-atmosphere span:nth-child(2) { top: -7vw; right: -7vw; width: 32vw; height: 32vw; }
  .menu-atmosphere span:nth-child(3) { bottom: -24vw; left: -20vw; width: 58vw; height: 58vw; }
  .menu.active .menu-atmosphere span { opacity: 1; transform: scale(1); }
  .menu.active .menu-atmosphere span:nth-child(1) { transition-delay: .12s; }
  .menu.active .menu-atmosphere span:nth-child(2) { transition-delay: .2s; }
  .menu.active .menu-atmosphere span:nth-child(3) { transition-delay: .3s; }
}

@media (max-width: 720px) {
  .page-header { height: 68px; }
  .page-header.is-compact { height: 54px; }
  .page-header .btn.primary { min-height: 42px; padding-inline: 14px; }
  .page-footer .actions { flex-direction: column; }
  .page-footer .btn { width: 100%; }
}

@media (max-width: 420px) {
  .logo img { width: 112px; }
  .page-header.is-compact .logo img { width: 98px; }
  .page-header > .wrapper { grid-template-columns: 1fr auto; }
  .page-header .actions { display: flex; }
  .page-header .actions .btn { display: none; }
  .menu-shell { gap: .85rem; padding-right: 1rem; padding-left: 1rem; }
  .menu a { min-height: clamp(3.65rem, 9vh, 4.6rem); grid-template-columns: 30px minmax(0, 1fr) auto; font-size: clamp(1.85rem, 8.2vw, 2.35rem); }
  .menu-index { padding-top: 1rem; }
  .menu-arrow { width: 31px; height: 31px; }
  .menu-footer { align-items: stretch; flex-direction: column; gap: 10px; }
  .menu .menu-footer > a { display: inline-flex; width: 100%; min-height: 48px; grid-template-columns: none; justify-content: space-between; align-self: stretch; padding: 0 14px; font-size: .8125rem; letter-spacing: 0; line-height: 1; }
}