/**
 * Marketing site header + full-screen mobile / desktop sheet nav.
 * Load after base styles that define :root tokens (--maintext, --menudivider, --accent-secondary).
 * The interactive demo (/demo/) uses demo.css only — this file is not loaded there.
 */

body.nav-mobile-open {
  overflow: hidden;
}

/* Header — desktop: translucent dark bar + white logo/nav (original) */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 9990;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 60px;
  background: rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition:
    background var(--site-header-bg-duration, 0.25s) cubic-bezier(0.32, 1, 0.36, 1),
    backdrop-filter var(--site-header-bg-duration, 0.25s) cubic-bezier(0.32, 1, 0.36, 1),
    -webkit-backdrop-filter var(--site-header-bg-duration, 0.25s) cubic-bezier(0.32, 1, 0.36, 1);
}

/* Header bar colour: same duration as nav overlay open/close (see .nav-mobile-overlay) */
@media (max-width: 799px) {
  body:is(.page-home, .page-marketing) {
    --site-header-bg-duration: 0.28s;
  }

  body:not(:is(.page-home, .page-marketing)) {
    --site-header-bg-duration: 0.22s;
  }
}

@media (min-width: 800px) {
  body:is(.page-home, .page-marketing) {
    --site-header-bg-duration: 0.392s;
  }
}

.site-header--menu-open {
  background: rgba(30, 30, 30, 0.92);
}

/* Homepage + marketing preview pages: transparent at top; darker after scroll; menu-open solid bar */
.site-header--home,
.site-header--marketing {
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}

.site-header--home.site-header--scrolled,
.site-header--marketing.site-header--scrolled {
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.site-header--home.site-header--menu-open,
.site-header--marketing.site-header--menu-open {
  background: rgba(30, 30, 30, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

/* Header wordmark — homepage + marketing previews only (demo uses demo.css) */
.logo.logo--home > span,
.logo.logo--wordmark > span {
  font-size: 12px;
  font-weight: 600;
  line-height: 1.5;
  text-transform: uppercase;
  letter-spacing: 2.4px;
}

@media (min-width: 800px) {
  /* Logo scale (icon follows 2em) */
  .site-header--home .logo,
  .site-header--marketing .logo {
    font-size: clamp(13.5px, 1.95vw, 24px);
  }
}

.logo {
  font-size: clamp(18px, 2.6vw, 32px);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: white;
  text-decoration: none;
  line-height: 1.15;
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
}

.logo-mark {
  height: 2em;
  width: auto;
  flex-shrink: 0;
  object-fit: contain;
  display: block;
}

.nav-burger {
  display: none;
  align-items: center;
  gap: 12px;
  min-width: 44px;
  min-height: 44px;
  padding: 8px 4px 8px 8px;
  margin: 0;
  border: none;
  background: transparent;
  cursor: pointer;
  color: #fff;
  font: inherit;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.nav-burger-icon {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 28px;
  flex-shrink: 0;
}

.nav-burger-line {
  display: block;
  height: 1px;
  width: 100%;
  background-color: currentColor;
  transition: transform 0.2s ease-in-out;
  transform-origin: center;
}

.nav-burger[aria-expanded="true"] .nav-burger-line:first-child {
  transform: translateY(3.5px) rotate(45deg);
}

.nav-burger[aria-expanded="true"] .nav-burger-line:last-child {
  transform: translateY(-3.5px) rotate(-45deg);
}

.nav-burger-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 2.4px;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.95);
}

.nav-burger-label--close {
  display: none;
}

.nav-burger[aria-expanded="true"] .nav-burger-label--open {
  display: none;
}

.nav-burger[aria-expanded="true"] .nav-burger-label--close {
  display: inline;
}

.nav--desktop {
  display: flex;
  gap: 40px;
}

.nav--desktop a {
  font-size: clamp(14px, 2vw, 18px);
  font-weight: 400;
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
  transition: opacity 0.2s ease-in-out;
}

/* design.md Navigation: horizontal links — dim siblings, hovered at full opacity */
@media (hover: hover) and (min-width: 800px) {
  .nav--desktop:hover a {
    opacity: 0.5;
  }

  .nav--desktop a:hover {
    opacity: 1;
  }
}

/* Desktop only: “How it works” — matches .mainbutton typography + bordered pulse CTA */
@media (min-width: 800px) {
  @keyframes nav-how-pulse {
    0%,
    100% {
      border-color: rgba(255, 255, 255, 0.82);
      box-shadow: 0 0 0 0 rgba(233, 30, 206, 0.2);
    }
    50% {
      border-color: rgba(255, 255, 255, 1);
      box-shadow: 0 0 12.5px 1.8px rgba(233, 30, 206, 0.45);
    }
  }

  .nav-how-btn {
    display: inline-flex;
    align-items: center;
    font-size: 10.8px;
    font-weight: 600;
    letter-spacing: 2.16px;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.95);
    text-decoration: none;
    padding: 10px 18px;
    border: 1px solid rgba(255, 255, 255, 0.85);
    border-radius: 9px;
    background: rgba(255, 255, 255, 0.07);
    transition:
      color 0.25s ease,
      opacity 0.2s ease-in-out,
      border-color 0.25s ease,
      box-shadow 0.3s ease;
    animation: nav-how-pulse 2.5s ease-in-out infinite;
  }

  .nav-how-btn::after {
    content: '→';
    margin-left: 7.2px;
    font-weight: 600;
  }

  .nav-how-btn:hover {
    color: var(--accent-secondary);
    border-color: rgba(233, 30, 206, 0.85);
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-thickness: 1px;
    text-decoration-color: currentColor;
    animation: none;
    box-shadow: 0 0 16px rgba(233, 30, 206, 0.35);
  }

  .nav-how-btn:focus-visible {
    outline: 2px solid #5dd4c4;
    outline-offset: 3px;
  }

  @media (hover: hover) {
    .nav-how-btn:hover::after {
      margin-left: 12.5px;
      transition: margin-left 0.3s ease-in-out;
    }
  }
}

@media (min-width: 800px) and (prefers-reduced-motion: reduce) {
  .nav-how-btn {
    animation: none;
    box-shadow: 0 0 11px rgba(233, 30, 206, 0.25);
  }
}

/* Homepage + marketing: burger on desktop (horizontal nav removed on marketing pages) */
@media (min-width: 800px) {
  .site-header--home .nav-burger,
  .site-header--marketing .nav-burger {
    display: flex;
    flex: 0 0 auto;
    margin-left: auto;
    align-self: center;
  }

  .site-header--marketing .nav--desktop {
    display: none !important;
  }
}

.nav-mobile-overlay {
  position: fixed;
  inset: 0;
  z-index: 9986;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: flex-start;
  /* Insets: match .site-header horizontal padding (20px mobile, 60px desktop for home/marketing) */
  padding-top: max(20px, env(safe-area-inset-top, 0px));
  padding-bottom: max(32px, env(safe-area-inset-bottom, 0px));
  padding-left: max(20px, env(safe-area-inset-left, 0px));
  padding-right: max(20px, env(safe-area-inset-right, 0px));
  background-color: var(--maintext);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translate3d(0, 0, 0);
  transition:
    opacity 0.22s cubic-bezier(0.33, 1, 0.36, 1),
    visibility 0.22s,
    transform 0.28s cubic-bezier(0.32, 1, 0.36, 1);
}

.nav-mobile-overlay--open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

/* Homepage: full-screen sheet slides in from the right (fast, GPU-friendly) */
body:is(.page-home, .page-marketing) .nav-mobile-overlay:not(.nav-mobile-overlay--open) {
  transform: translate3d(100%, 0, 0);
}

body:is(.page-home, .page-marketing) .nav-mobile-overlay--open {
  transform: translate3d(0, 0, 0);
}

@media (min-width: 800px) {
  body:is(.page-home, .page-marketing) .nav-mobile-overlay {
    padding-left: max(60px, env(safe-area-inset-left, 0px));
    padding-right: max(60px, env(safe-area-inset-right, 0px));
  }
}

@keyframes navMobileItemIn {
  from {
    opacity: 0;
    transform: translateY(-0.42em);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes navMobileFadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* Homepage: stagger main + secondary links top → bottom */
body:is(.page-home, .page-marketing) .nav-mobile-overlay--open .nav-mobile-main li:nth-child(1) a {
  animation: navMobileItemIn 0.26s cubic-bezier(0.32, 1, 0.36, 1) both;
  animation-delay: 0.04s;
}

body:is(.page-home, .page-marketing) .nav-mobile-overlay--open .nav-mobile-main li:nth-child(2) a {
  animation: navMobileItemIn 0.26s cubic-bezier(0.32, 1, 0.36, 1) both;
  animation-delay: 0.08s;
}

body:is(.page-home, .page-marketing) .nav-mobile-overlay--open .nav-mobile-main li:nth-child(3) a {
  animation: navMobileItemIn 0.26s cubic-bezier(0.32, 1, 0.36, 1) both;
  animation-delay: 0.12s;
}

body:is(.page-home, .page-marketing) .nav-mobile-overlay--open .nav-mobile-main li:nth-child(4) a {
  animation: navMobileItemIn 0.26s cubic-bezier(0.32, 1, 0.36, 1) both;
  animation-delay: 0.16s;
}

body:is(.page-home, .page-marketing) .nav-mobile-overlay--open .nav-mobile-main li:nth-child(5) a {
  animation: navMobileItemIn 0.26s cubic-bezier(0.32, 1, 0.36, 1) both;
  animation-delay: 0.2s;
}

body:is(.page-home, .page-marketing) .nav-mobile-overlay--open .nav-mobile-secondary li:nth-child(1) a {
  animation: navMobileItemIn 0.26s cubic-bezier(0.32, 1, 0.36, 1) both;
  animation-delay: 0.17s;
}

body:is(.page-home, .page-marketing) .nav-mobile-overlay--open .nav-mobile-secondary li:nth-child(2) a {
  animation: navMobileItemIn 0.26s cubic-bezier(0.32, 1, 0.36, 1) both;
  animation-delay: 0.2s;
}

body:is(.page-home, .page-marketing) .nav-mobile-overlay--open .nav-mobile-secondary li:nth-child(3) a {
  animation: navMobileItemIn 0.26s cubic-bezier(0.32, 1, 0.36, 1) both;
  animation-delay: 0.23s;
}

body:is(.page-home, .page-marketing) .nav-mobile-overlay--open .nav-mobile-secondary li:nth-child(4) a {
  animation: navMobileItemIn 0.26s cubic-bezier(0.32, 1, 0.36, 1) both;
  animation-delay: 0.26s;
}

body:is(.page-home, .page-marketing) .nav-mobile-overlay--open .nav-mobile-secondary li:nth-child(5) a {
  animation: navMobileItemIn 0.26s cubic-bezier(0.32, 1, 0.36, 1) both;
  animation-delay: 0.29s;
}

body:is(.page-home, .page-marketing) .nav-mobile-overlay--open .nav-mobile-divider {
  animation: navMobileFadeIn 0.22s ease both;
  animation-delay: 0.14s;
}

body:is(.page-home, .page-marketing) .nav-mobile-overlay--open .nav-mobile-credits {
  animation: navMobileFadeIn 0.22s ease both;
  animation-delay: 0.18s;
}

/* Desktop homepage: +40% duration (1.4×) for sheet, links, and burger X */
@media (min-width: 800px) {
  body:is(.page-home, .page-marketing) .nav-mobile-overlay {
    transition:
      opacity 0.308s cubic-bezier(0.33, 1, 0.36, 1),
      visibility 0.308s,
      transform 0.392s cubic-bezier(0.32, 1, 0.36, 1);
  }

  body:is(.page-home, .page-marketing) .nav-burger-line {
    transition: transform 0.28s ease-in-out;
  }

  body:is(.page-home, .page-marketing) .nav-mobile-overlay--open .nav-mobile-main li:nth-child(1) a {
    animation-duration: 0.364s;
    animation-delay: 0.056s;
  }

  body:is(.page-home, .page-marketing) .nav-mobile-overlay--open .nav-mobile-main li:nth-child(2) a {
    animation-duration: 0.364s;
    animation-delay: 0.112s;
  }

  body:is(.page-home, .page-marketing) .nav-mobile-overlay--open .nav-mobile-main li:nth-child(3) a {
    animation-duration: 0.364s;
    animation-delay: 0.168s;
  }

  body:is(.page-home, .page-marketing) .nav-mobile-overlay--open .nav-mobile-main li:nth-child(4) a {
    animation-duration: 0.364s;
    animation-delay: 0.224s;
  }

  body:is(.page-home, .page-marketing) .nav-mobile-overlay--open .nav-mobile-main li:nth-child(5) a {
    animation-duration: 0.364s;
    animation-delay: 0.28s;
  }

  body:is(.page-home, .page-marketing) .nav-mobile-overlay--open .nav-mobile-secondary li:nth-child(1) a {
    animation-duration: 0.364s;
    animation-delay: 0.238s;
  }

  body:is(.page-home, .page-marketing) .nav-mobile-overlay--open .nav-mobile-secondary li:nth-child(2) a {
    animation-duration: 0.364s;
    animation-delay: 0.28s;
  }

  body:is(.page-home, .page-marketing) .nav-mobile-overlay--open .nav-mobile-secondary li:nth-child(3) a {
    animation-duration: 0.364s;
    animation-delay: 0.322s;
  }

  body:is(.page-home, .page-marketing) .nav-mobile-overlay--open .nav-mobile-secondary li:nth-child(4) a {
    animation-duration: 0.364s;
    animation-delay: 0.364s;
  }

  body:is(.page-home, .page-marketing) .nav-mobile-overlay--open .nav-mobile-secondary li:nth-child(5) a {
    animation-duration: 0.364s;
    animation-delay: 0.406s;
  }

  body:is(.page-home, .page-marketing) .nav-mobile-overlay--open .nav-mobile-divider {
    animation-duration: 0.308s;
    animation-delay: 0.196s;
  }

  body:is(.page-home, .page-marketing) .nav-mobile-overlay--open .nav-mobile-credits {
    animation-duration: 0.308s;
    animation-delay: 0.252s;
  }
}

/* Initial open focus lands here — avoid browser / link focus chrome */
.nav-mobile-overlay:focus,
.nav-mobile-overlay:focus-visible {
  outline: none;
}

.nav-mobile {
  width: 100%;
  max-width: 100%;
}

.nav-mobile-main,
.nav-mobile-secondary {
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-mobile-main {
  margin-bottom: 28px;
}

.nav-mobile-main li + li {
  margin-top: 0.12em;
}

.nav-mobile-main a {
  display: inline-block;
  font-size: clamp(40px, 10vw, 88px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  color: #fff;
  text-decoration: none;
  padding-left: 0;
  transition: opacity 0.2s ease-in-out, padding-left 0.2s ease-in-out;
}

@media (max-width: 799px) {
  /* Pull-out sheet: slightly smaller type than desktop overlay so items fit narrow phones */
  .nav-mobile-main a {
    font-size: clamp(52px, 13vw, 112px);
  }

  .nav-mobile-secondary a {
    font-size: clamp(12px, 3vw, 17px);
  }
}

/* Homepage only: desktop pull-out main links (~100% over base, then −20% for legibility) */
@media (min-width: 800px) {
  :is(.page-home, .page-marketing) .nav-mobile-main a {
    font-size: clamp(64px, 16vw, 141px);
  }
}

.nav-mobile-secondary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 24px 40px;
  width: 100%;
  box-sizing: border-box;
}

/* Desktop pull-out: even rail between divider and credits border (was 28px / 40px). */
@media (min-width: 800px) {
  :is(.page-home, .page-marketing) .nav-mobile-divider {
    margin-bottom: 34px;
  }

  :is(.page-home, .page-marketing) .nav-mobile-credits {
    margin-top: 34px;
  }
}

.nav-mobile-secondary a {
  display: inline-block;
  font-size: clamp(14px, 3.5vw, 20px);
  font-weight: 400;
  line-height: 1.3;
  color: rgba(255, 255, 255, 0.88);
  text-decoration: none;
  padding-left: 0;
  padding-top: 0.12em;
  padding-bottom: 0.12em;
  transition: opacity 0.2s ease-in-out, padding-left 0.2s ease-in-out;
}

/* design.md Navigation: overlay — dim peer links in same group; hovered at 1 + pad */
@media (hover: hover) {
  .nav-mobile-main:hover a {
    opacity: 0.5;
  }

  .nav-mobile-main a:hover {
    opacity: 1;
    padding-left: 10px;
  }

  .nav-mobile-secondary:hover a {
    opacity: 0.5;
  }

  .nav-mobile-secondary a:hover {
    opacity: 1;
    padding-left: 10px;
  }
}

.nav-mobile-divider {
  height: 1px;
  width: 100%;
  max-width: 100%;
  align-self: stretch;
  margin-bottom: 28px;
  background-color: var(--menudivider);
}

/* Mobile menu footer — matches site credits-bar (design tokens) */
.nav-mobile-credits {
  width: 100%;
  max-width: 100%;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--menudivider);
  font-size: 11px;
  font-weight: 500;
  line-height: 1.5;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.45);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.nav-mobile-credits__by {
  display: block;
}

.nav-mobile-credits a {
  color: rgba(255, 255, 255, 0.72);
  text-decoration: none;
  transition: color 0.2s ease-in-out;
}

@media (hover: hover) {
  .nav-mobile-credits a:hover {
    color: rgba(255, 255, 255, 0.95);
  }
}

.nav-mobile-main a:focus-visible,
.nav-mobile-secondary a:focus-visible,
.nav-mobile-credits a:focus-visible {
  outline: none;
  text-decoration: underline;
  text-decoration-thickness: 0.07em;
  text-underline-offset: 0.2em;
  text-decoration-color: rgba(255, 255, 255, 0.82);
}

/* Mobile + OS dark mode: keep full-screen nav dark (some UAs auto-invert or light-theme the overlay). */
@media (max-width: 799px) and (prefers-color-scheme: dark) {
  .nav-mobile-overlay {
    background-color: #1a1a1e;
    color-scheme: dark;
    color: #fff;
  }

  .nav-mobile-main a {
    color: #fff;
  }

  .nav-mobile-secondary a {
    color: rgba(255, 255, 255, 0.88);
  }

  .nav-mobile-divider {
    background-color: #3e3e3e;
  }

  .nav-mobile-credits {
    color: rgba(255, 255, 255, 0.45);
  }

  .nav-mobile-credits a {
    color: rgba(255, 255, 255, 0.72);
  }
}

@media (hover: none) and (max-width: 799px) {
  .nav-mobile-main a:active,
  .nav-mobile-secondary a:active {
    opacity: 0.75;
  }
}

@media (prefers-reduced-motion: reduce) {
  .nav-burger-line,
  .site-header,
  .nav-mobile-overlay,
  .nav-mobile-main a,
  .nav-mobile-secondary a {
    transition: none;
  }

  body:is(.page-home, .page-marketing) .nav-mobile-overlay {
    transform: none !important;
  }

  body:is(.page-home, .page-marketing) .nav-mobile-overlay--open .nav-mobile-main a,
  body:is(.page-home, .page-marketing) .nav-mobile-overlay--open .nav-mobile-secondary a,
  body:is(.page-home, .page-marketing) .nav-mobile-overlay--open .nav-mobile-divider,
  body:is(.page-home, .page-marketing) .nav-mobile-overlay--open .nav-mobile-credits {
    animation: none !important;
  }
}

@media (max-width: 799px) {
  .site-header {
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    padding-top: max(16px, env(safe-area-inset-top, 0px));
    column-gap: 12px;
  }

  /* Let the logo stay left; title ellipsizes so the menu stays right */
  .site-header .logo {
    flex: 1 1 auto;
    min-width: 0;
    justify-content: flex-start;
    align-self: center;
  }

  .site-header .logo > span {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .nav-burger {
    display: flex;
    flex: 0 0 auto;
    margin-left: auto;
    align-self: center;
  }

  .nav--desktop {
    display: none;
  }
}