/* =============================================================================
   LAYOUT — page shell, header, menu, footer, media wrappers, decor
   Mobile-first. Breakpoints: 40em / 48em / 62em / 80em.
   ========================================================================== */

/* ---- Container & section ------------------------------------------------- */

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.container--narrow { max-width: var(--container-narrow); }

.section {
  position: relative;
  z-index: var(--z-content);
  padding-block: var(--sp-xl);
  isolation: isolate;
}

.section--tall { padding-block: var(--sp-2xl); }
.section--flush { padding-block: 0; }

/* Full-bleed child inside a container */
.bleed {
  width: 100vw;
  margin-inline: calc(50% - 50vw);
}

/* Stack: the workhorse. Vertical rhythm without margin collisions. */
.stack > * + * { margin-top: var(--stack-gap, var(--sp-sm)); }
.stack--sm { --stack-gap: var(--sp-xs); }
.stack--lg { --stack-gap: var(--sp-md); }

/* Grid: 1 column on mobile, opt into columns per section */
.grid {
  display: grid;
  gap: var(--grid-gap, var(--sp-md));
  grid-template-columns: 1fr;
}

@media (min-width: 48em) {
  .grid--2 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 62em) {
  .grid--3 { grid-template-columns: repeat(3, 1fr); }
  .grid--split { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }
}

/* ---- Atmosphere (fixed background layer) --------------------------------- */

.atmosphere {
  position: fixed;
  inset: 0;
  z-index: var(--z-atmosphere);
  pointer-events: none;
  overflow: hidden;
}

.atmosphere__glow {
  position: absolute;
  display: block;
  border-radius: 50%;
  background: var(--grad-glow);
  opacity: 0.55;
  filter: blur(10px);
  will-change: transform;
}

.atmosphere__glow--a {
  width: 78vw; height: 78vw;
  top: -18vw; right: -26vw;
}

.atmosphere__glow--b {
  width: 92vw; height: 92vw;
  bottom: -34vw; left: -34vw;
  opacity: 0.38;
}

@media (min-width: 62em) {
  .atmosphere__glow--a { width: 42vw; height: 42vw; top: -10vw; right: -8vw; }
  .atmosphere__glow--b { width: 50vw; height: 50vw; bottom: -18vw; left: -12vw; }
}

/* Film grain. Inline SVG so there is no extra request and no asset to manage. */
.atmosphere__grain {
  position: absolute;
  inset: -50%;
  opacity: 0.30;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.42'/%3E%3C/svg%3E");
}

/* ---- Header -------------------------------------------------------------- */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  padding-top: env(safe-area-inset-top);
  transition: transform var(--dur-mid) var(--ease-out),
              background-color var(--dur-mid) var(--ease-out),
              border-color var(--dur-mid) var(--ease-out);
  /* border-bottom: 1px solid transparent; */
}

/* Solid-ish once the user has scrolled past the fold edge */
.site-header.is-scrolled {
  background: color-mix(in srgb, var(--white) 92%, transparent);
  backdrop-filter: blur(14px) saturate(1.4);
  -webkit-backdrop-filter: blur(14px) saturate(1.4);
  /* border-bottom-color: var(--line-soft); */
}

/* Slides away on scroll down, returns on scroll up */
.site-header.is-hidden { transform: translate3d(0, -100%, 0); }

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-sm);
  min-height: var(--header-h);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  color: var(--fg-strong);
  letter-spacing: -0.01em;
}

.brand__mark {
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  background: var(--grad-accent);
  flex: none;
}

.site-nav { display: none; }

.site-header__cta { display: none; }

.site-header__progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  height: 2px;
  width: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: var(--grad-accent);
  display: none;
}

@media (min-width: 62em) {
  .site-nav { display: block; }

  .site-nav__list {
    display: flex;
    align-items: center;
    gap: var(--sp-md);
    font-size: var(--fs-sm);
  }

  .site-nav__list a {
    position: relative;
    padding-block: 0.35rem;
    color: var(--fg);
    transition: color var(--dur-fast) var(--ease-out);
  }

  .site-nav__list a::after {
    content: '';
    position: absolute;
    left: 0; bottom: 0;
    width: 100%;
    height: 1px;
    background: currentColor;
    transform: scaleX(0);
    transform-origin: 100% 50%;
    transition: transform var(--dur-mid) var(--ease-out);
  }

  .site-nav__list a:hover { color: var(--fg-strong); }
  .site-nav__list a:hover::after { transform: scaleX(1); transform-origin: 0 50%; }

  .site-header__cta { display: inline-flex; }
  .menu-toggle { display: none; }
}

/* ---- Menu toggle (hamburger → close) ------------------------------------- */

.menu-toggle {
  display: grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  margin-right: -0.5rem;
  border-radius: 50%;
}

.menu-toggle__box {
  position: relative;
  display: block;
  width: 1.375rem;
  height: 0.75rem;
}

.menu-toggle__bar,
.menu-toggle__bar::before,
.menu-toggle__bar::after {
  position: absolute;
  left: 0;
  width: 100%;
  height: 1.5px;
  background: var(--fg-strong);
  border-radius: 2px;
  transition: transform var(--dur-mid) var(--ease-out),
              opacity var(--dur-fast) linear;
}

.menu-toggle__bar { top: 50%; transform: translateY(-50%); }
.menu-toggle__bar::before { content: ''; top: -6px; }
.menu-toggle__bar::after { content: ''; top: 6px; }

.menu-toggle[aria-expanded='true'] .menu-toggle__bar { transform: rotate(45deg); }
.menu-toggle[aria-expanded='true'] .menu-toggle__bar::before { transform: translateY(6px) rotate(-90deg); }
.menu-toggle[aria-expanded='true'] .menu-toggle__bar::after { opacity: 0; }

/* ---- Mobile menu --------------------------------------------------------- */

.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: var(--z-menu);
  display: grid;
  align-items: center;
  padding: calc(var(--header-h) + var(--sp-lg)) var(--gutter) var(--sp-xl);
  background: var(--grad-dark);
  color: var(--cream);
  opacity: 0;
  visibility: hidden;
  clip-path: inset(0 0 100% 0);
  transition: clip-path var(--dur-slow) var(--ease-out),
              opacity var(--dur-mid) var(--ease-out),
              visibility 0s linear var(--dur-slow);
}

/* visibility:hidden keeps the panel out of the a11y tree and out of the tab
   order while still allowing the clip-path transition to run. */

.mobile-menu.is-open {
  opacity: 1;
  visibility: visible;
  clip-path: inset(0 0 0 0);
  transition-delay: 0s;
}

.mobile-menu__list {
  display: grid;
  gap: var(--sp-sm);
  font-family: var(--font-display);
  font-size: var(--fs-2xl);
  line-height: 1.1;
}

.mobile-menu__list a {
  display: inline-block;
  transform: translateY(1.2em);
  opacity: 0;
  transition: transform var(--dur-slow) var(--ease-out),
              opacity var(--dur-slow) var(--ease-out);
}

.mobile-menu.is-open .mobile-menu__list a { transform: translateY(0); opacity: 1; }
.mobile-menu.is-open li:nth-child(1) a { transition-delay: 0.10s; }
.mobile-menu.is-open li:nth-child(2) a { transition-delay: 0.17s; }
.mobile-menu.is-open li:nth-child(3) a { transition-delay: 0.24s; }
.mobile-menu.is-open li:nth-child(4) a { transition-delay: 0.31s; }

@media (min-width: 62em) {
  .mobile-menu { display: none; }
}

/* ---- Media wrappers ------------------------------------------------------ */

.media {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  background: var(--sand-2);
}

.media img,
.media video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Parallax needs headroom, or the image edge shows during the shift */
.media img[data-parallax] { height: 118%; margin-top: -9%; }

.media--1x1 { aspect-ratio: 1 / 1; }
.media--4x3 { aspect-ratio: 4 / 3; }
.media--3x4 { aspect-ratio: 3 / 4; }
.media--16x9 { aspect-ratio: 16 / 9; }

/* Dark wash over an image so text stays readable on any photo */
.media--scrim::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--grad-scrim);
}

/* ---- Decorative elements ------------------------------------------------- */

.decor {
  position: absolute;
  display: block;
  pointer-events: none;
  z-index: -1;
  will-change: transform;
}

.decor--ring {
  width: clamp(6rem, 30vw, 13rem);
  aspect-ratio: 1;
  border: 1px solid var(--line);
  border-radius: 50%;
  top: 12%;
  right: -12%;
}

.decor--dot {
  width: 0.5rem;
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--red-600);
  bottom: 18%;
  left: 8%;
}

.decor--line {
  width: 1px;
  height: clamp(4rem, 18vw, 9rem);
  background: var(--grad-hairline);
}

.decor--blob {
  width: clamp(10rem, 45vw, 22rem);
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--grad-glow);
  filter: blur(20px);
}

/* ---- Footer -------------------------------------------------------------- */

.site-footer {
  position: relative;
  z-index: var(--z-content);
  padding-block: var(--sp-lg);
  padding-bottom: calc(var(--sp-lg) + env(safe-area-inset-bottom));
  border-top: 1px solid var(--line-soft);
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-xs);
  font-size: var(--fs-sm);
  color: var(--ink-400);
}

.site-footer__top {
  transition: color var(--dur-fast) var(--ease-out);
}

.site-footer__top:hover { color: var(--fg-strong); }