/* ============================================
   LAYOUT — Nav, Footer, Grid, Containers
   ============================================ */

/* --- Grain Overlay --- */
.grain-overlay {
  position: fixed;
  inset: 0;
  z-index: var(--z-grain);
  pointer-events: none;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  mix-blend-mode: overlay;
}

/* --- Mesh Gradient Background --- */
.mesh-gradient {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
}

.mesh-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.15;
  will-change: transform;
  animation: meshFloat 20s var(--ease-in-out-quint) infinite alternate;
}

[data-theme="light"] .mesh-blob {
  opacity: 0.08;
}

.mesh-blob--1 {
  width: 40vw;
  height: 40vw;
  background: var(--mesh-1);
  top: -10%;
  right: -10%;
  animation-delay: 0s;
}

.mesh-blob--2 {
  width: 35vw;
  height: 35vw;
  background: var(--mesh-2);
  bottom: -10%;
  left: -5%;
  animation-delay: -7s;
}

.mesh-blob--3 {
  width: 30vw;
  height: 30vw;
  background: var(--mesh-3);
  top: 40%;
  left: 30%;
  animation-delay: -14s;
}

@keyframes meshFloat {
  0% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -50px) scale(1.1); }
  66% { transform: translate(-20px, 30px) scale(0.95); }
  100% { transform: translate(10px, -20px) scale(1.05); }
}

/* (Nav removed — navigation is inline in pages) */

/* --- Main Content --- */
.main {
  min-height: 100vh;
}

/* Homepage: single viewport, no scroll */
.main--home {
  height: 100dvh;
  height: 100vh; /* fallback */
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* --- Section Container --- */
.section {
  padding: var(--space-3xl) var(--space-lg);
}

.section--hero {
  flex: 1;
  display: flex;
  align-items: center;
  padding: var(--space-lg);
}

.container {
  max-width: var(--content-width);
  margin: 0 auto;
  width: 100%;
}

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

/* --- Hero Bento Grid --- */
.grid-hero {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: var(--space-xl);
  align-items: center;
  width: 100%;
}

.grid-hero__left {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.grid-hero__right {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: auto auto auto;
  gap: var(--space-sm);
}

/* Grid item span modifiers */
.grid-hero__item--span2 { grid-column: span 2; }
.grid-hero__item--span3 { grid-column: span 3; }
.grid-hero__item--tall  { grid-row: span 2; }

/* --- Footer --- */
.footer {
  border-top: 1px solid var(--border);
  background: var(--bg-secondary);
  padding: var(--space-2xl) var(--space-lg) var(--space-lg);
}

.footer__inner {
  max-width: var(--content-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-xl);
}

.footer__brand {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  font-weight: 800;
}

.footer__accent {
  color: var(--accent);
}

.footer__tagline {
  color: var(--text-tertiary);
  margin-top: var(--space-2xs);
  font-size: var(--text-sm);
}

.footer__socials {
  display: flex;
  gap: var(--space-xs);
}

.footer__social {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-full);
  color: var(--text-tertiary);
  transition: color var(--transition-fast),
              background var(--transition-fast),
              transform var(--transition-fast);
}

.footer__social svg {
  width: 18px;
  height: 18px;
}

.footer__social:hover {
  color: var(--accent);
  background: var(--accent-subtle);
  transform: translateY(-2px);
}

.footer__bottom {
  max-width: var(--content-width);
  margin: var(--space-xl) auto 0;
  padding-top: var(--space-md);
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-sm);
  color: var(--text-tertiary);
  font-size: var(--text-xs);
}

.footer__bottom p {
  margin: 0;
}

/* --- Custom language picker --- */
.lang-picker {
  position: relative;
  font-family: var(--font-mono);
}

.lang-picker__trigger {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px 6px 9px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  transition:
    border-color 180ms ease,
    color 180ms ease,
    background 180ms ease,
    transform 180ms ease;
}

.lang-picker__trigger:hover {
  border-color: var(--accent);
  color: var(--text-primary);
  background: var(--accent-subtle);
  transform: translateY(-1px);
}

.lang-picker__trigger:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.lang-picker__globe {
  width: 13px;
  height: 13px;
  flex-shrink: 0;
  color: var(--accent);
  opacity: 0.85;
}

.lang-picker__code {
  letter-spacing: 0.1em;
}

.lang-picker__chevron {
  width: 10px;
  height: 10px;
  flex-shrink: 0;
  opacity: 0.6;
  transition: transform 220ms cubic-bezier(0.22, 1, 0.36, 1);
}

.lang-picker__trigger[aria-expanded="true"] .lang-picker__chevron {
  transform: rotate(180deg);
}

.lang-picker__trigger[aria-expanded="true"] {
  border-color: var(--accent);
  background: var(--accent-subtle);
  color: var(--text-primary);
}

/* Popover menu */
.lang-picker__menu {
  position: absolute;
  bottom: calc(100% + 8px);
  right: 0;
  min-width: 180px;
  padding: 6px;
  margin: 0;
  list-style: none;
  list-style-type: none;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow:
    0 10px 30px rgba(0, 0, 0, 0.25),
    0 2px 8px rgba(0, 0, 0, 0.12);
  opacity: 0;
  transform: translateY(8px) scale(0.98);
  transform-origin: bottom right;
  pointer-events: none;
  visibility: hidden;
  transition:
    opacity 220ms cubic-bezier(0.22, 1, 0.36, 1),
    transform 220ms cubic-bezier(0.22, 1, 0.36, 1),
    visibility 0s linear 220ms;
  z-index: 60;
}

.lang-picker.is-open .lang-picker__menu {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
  visibility: visible;
  transition:
    opacity 220ms cubic-bezier(0.22, 1, 0.36, 1),
    transform 220ms cubic-bezier(0.22, 1, 0.36, 1),
    visibility 0s linear;
}

.lang-picker__option {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 9px 12px 9px 10px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 12px;
  cursor: pointer;
  transition: background 160ms ease, color 160ms ease;
  user-select: none;
}

.lang-picker__option:hover,
.lang-picker__option:focus-visible,
.lang-picker__option.is-focused {
  background: var(--accent-subtle);
  color: var(--text-primary);
  outline: none;
}

.lang-picker__option[aria-selected="true"] {
  color: var(--accent);
}

.lang-picker__option[aria-selected="true"]::after {
  content: '';
  width: 6px;
  height: 6px;
  margin-left: auto;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-subtle);
}

.lang-picker__option-code {
  display: inline-block;
  min-width: 22px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-tertiary);
}

.lang-picker__option[aria-selected="true"] .lang-picker__option-code,
.lang-picker__option:hover .lang-picker__option-code {
  color: currentColor;
  opacity: 0.75;
}

.lang-picker__option-label {
  font-family: var(--font-sans, 'Inter', sans-serif);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: normal;
  text-transform: none;
}