/* =============================================================================
   Smooth Mega Menu — Premium Light
   -----------------------------------------------------------------------------
   Header-only mega menu. Soft light palette, sharp CTAs (no pill rounding).
   ============================================================================= */

/* ---------- Tokens ---------- */

:root {
  --mega-nav-height: 68px;
  --mega-nav-height-mobile: 56px;
  --mega-nav-max-width: 1120px;
  --mega-nav-pad-x: 2rem;
  --mega-nav-pad-x-mobile: 1.25rem;

  /* Premium light palette */
  --color-bg: #faf9f7;
  --color-surface: #ffffff;
  --color-stage: #f3f1ed;
  --color-border: #e8e4de;
  --color-border-soft: #efece7;
  --color-ink: #1a1917;
  --color-ink-muted: #5c5954;
  --color-ink-soft: #8a8680;
  --color-ink-faint: #a8a49c;
  --color-surface-media: #ebe7e1;
  --color-cta: #1a1917;
  --color-cta-hover: #2e2c29;
  --color-scrim: rgba(26, 25, 23, 0.18);

  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica,
    Arial, sans-serif;
  --ease-color: 0.2s ease;
  --radius-media: 2px;
  --radius-btn: 2px;
}

/* ---------- Reset ---------- */

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
  font-family: var(--font-sans);
  color: var(--color-ink);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--color-stage);
  overflow: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  color: inherit;
  border: 0;
  background: none;
  cursor: pointer;
}

ul {
  list-style: none;
}

img {
  display: block;
  max-width: 100%;
}

/* ---------- Empty stage (menu focus only) ---------- */

.stage {
  width: 100%;
  height: 100%;
  min-height: 100dvh;
  background:
    radial-gradient(
      ellipse 80% 50% at 50% 0%,
      rgba(255, 255, 255, 0.7) 0%,
      transparent 55%
    ),
    var(--color-stage);
}

/* ---------- Mega nav shell ---------- */

.mega-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--mega-nav-height);
  padding-left: max(
    var(--mega-nav-pad-x),
    calc((100% - var(--mega-nav-max-width)) / 2 + var(--mega-nav-pad-x))
  );
  padding-right: max(
    var(--mega-nav-pad-x),
    calc((100% - var(--mega-nav-max-width)) / 2 + var(--mega-nav-pad-x))
  );
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  font-family: var(--font-sans);
  color: var(--color-ink);
}

.mega-nav__logo {
  flex-shrink: 0;
  z-index: 10;
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--color-ink);
  white-space: nowrap;
}

/* ---------- Primary list ---------- */

.mega-nav__list-wrap {
  position: relative;
  display: flex;
  align-items: center;
  height: 100%;
}

.mega-nav__list {
  display: flex;
  align-items: center;
  height: 100%;
  gap: 0;
}

.mega-nav__item {
  position: static;
  display: flex;
  align-items: center;
  height: 100%;
}

.mega-nav__trigger {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  height: 100%;
  padding: 0 1.25rem;
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--color-ink-muted);
  white-space: nowrap;
  transition: color var(--ease-color);
}

.mega-nav__trigger:hover,
.mega-nav__trigger[aria-expanded="true"] {
  color: var(--color-ink);
}

.mega-nav__trigger-arrow {
  display: inline-block;
  width: 0.4rem;
  height: 0.4rem;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translateY(-1px);
  transform-origin: center;
  transition: transform 0.25s ease;
  will-change: transform;
  opacity: 0.7;
}

.mega-nav__trigger[aria-expanded="true"] .mega-nav__trigger-arrow {
  transform: rotate(-135deg) translateY(-1px);
  opacity: 1;
}

.mega-nav__indicator {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 1px;
  height: 1.5px;
  background-color: var(--color-ink);
  transform-origin: left center;
  opacity: 0;
  pointer-events: none;
  will-change: transform, opacity;
}

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

.mega-nav__actions {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-shrink: 0;
  z-index: 10;
}

.mega-nav__text-link {
  position: relative;
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--color-ink-muted);
  white-space: nowrap;
  padding-bottom: 2px;
}

.mega-nav__text-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background-color: var(--color-ink);
  transform: scaleX(0);
  transform-origin: right center;
  transition: transform 0.45s cubic-bezier(0.22, 1, 0.36, 1);
}

.mega-nav__text-link:hover {
  color: var(--color-ink);
}

.mega-nav__text-link:hover::after {
  transform: scaleX(1);
  transform-origin: left center;
}

/* Sharp CTA — smooth background only (no scale / lift) */
.mega-nav__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 38px;
  padding: 0 1.35rem;
  background-color: var(--color-cta);
  border-radius: var(--radius-btn);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #faf9f7;
  white-space: nowrap;
  transition: background-color 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

.mega-nav__cta:hover {
  background-color: var(--color-cta-hover);
}

.mega-nav__cta:focus-visible {
  outline: 2px solid var(--color-ink);
  outline-offset: 3px;
}

/* ---------- Burger (mobile) ---------- */

.mega-nav__burger {
  display: none;
  position: relative;
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  padding: 0;
}

.mega-nav__burger-line {
  position: absolute;
  left: 50%;
  width: 18px;
  height: 1.5px;
  background-color: var(--color-ink);
  transform: translateX(-50%);
  transform-origin: center;
  transition: transform 0.3s ease;
  will-change: transform;
}

.mega-nav__burger-line--top {
  top: calc(50% - 4px);
}

.mega-nav__burger-line--bottom {
  top: calc(50% + 4px);
}

.mega-nav__burger[aria-expanded="true"] .mega-nav__burger-line--top {
  transform: translate(-50%, 4px) rotate(45deg);
}

.mega-nav__burger[aria-expanded="true"] .mega-nav__burger-line--bottom {
  transform: translate(-50%, -4px) rotate(-45deg);
}

/* ---------- Dropdown shell ---------- */

.mega-nav__dropdown {
  position: fixed;
  top: var(--mega-nav-height);
  left: 0;
  right: 0;
  z-index: 190;
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  overflow: hidden;
  transform-origin: top center;
  visibility: hidden;
  pointer-events: none;
  will-change: transform, height;
  box-shadow: 0 24px 48px rgba(26, 25, 23, 0.06);
}

.mega-nav__dropdown-inner {
  position: relative;
  width: 100%;
  height: 0;
}

.mega-nav__panel {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  opacity: 0;
  pointer-events: none;
  visibility: hidden;
  will-change: opacity;
}

.mega-nav__panel-body {
  display: flex;
  gap: 3.5rem;
  max-width: var(--mega-nav-max-width);
  margin: 0 auto;
  padding: 2.5rem 2rem 2.75rem;
}

.mega-nav__columns {
  display: flex;
  flex: 1;
  gap: 3rem;
}

.mega-nav__column {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  min-width: 150px;
  will-change: transform, opacity;
}

.mega-nav__column-label {
  display: block;
  margin-bottom: 0.65rem;
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-ink-faint);
}

/* ---------- Links ---------- */

.mega-nav__link {
  position: relative;
  display: block;
  padding: 0.3rem 0;
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: -0.015em;
  color: var(--color-ink-muted);
  transition: color var(--ease-color);
  will-change: transform, opacity;
}

.mega-nav__link:hover {
  color: var(--color-ink);
}

.mega-nav__link-dot {
  position: absolute;
  left: 0;
  top: 50%;
  display: inline-block;
  width: 0.3rem;
  height: 0.3rem;
  border-radius: 50%;
  background-color: var(--color-ink);
  transform: translateY(-50%) scale(0);
  transform-origin: center;
  pointer-events: none;
  will-change: transform;
}

.mega-nav__link-label {
  display: inline-block;
  will-change: transform;
}

/* ---------- Preview card ---------- */

.mega-nav__preview {
  flex-shrink: 0;
  width: 280px;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  will-change: opacity, transform;
}

.mega-nav__preview-media {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-media);
  overflow: hidden;
  background-color: var(--color-surface-media);
  /* GPU layer for buttery opacity blends */
  transform: translateZ(0);
}

/* Dual absolute layers — opacity crossfade only (no layout shift) */
.mega-nav__preview-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  pointer-events: none;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  will-change: opacity;
  /* Prevent image drag flash */
  user-select: none;
  -webkit-user-drag: none;
}

.mega-nav__preview-image--a {
  z-index: 2;
}

.mega-nav__preview-image--b {
  z-index: 1;
  opacity: 0;
}

.mega-nav__preview-body {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  overflow: hidden;
}

.mega-nav__preview-eyebrow {
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-ink-faint);
  will-change: transform, opacity;
}

.mega-nav__preview-heading {
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.4;
  color: var(--color-ink);
  will-change: transform, opacity;
}

/* Outline CTA — smooth fill + text color only (no scale / wipe) */
.mega-nav__preview-cta {
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
  margin-top: 0.5rem;
  height: 34px;
  padding: 0 1rem;
  background-color: transparent;
  border: 1px solid var(--color-ink);
  border-radius: var(--radius-btn);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-ink);
  transition:
    background-color 0.4s cubic-bezier(0.22, 1, 0.36, 1),
    color 0.4s cubic-bezier(0.22, 1, 0.36, 1),
    border-color 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

.mega-nav__preview-cta:hover {
  background-color: var(--color-ink);
  color: var(--color-bg);
  border-color: var(--color-ink);
}

.mega-nav__preview-cta:focus-visible {
  outline: 2px solid var(--color-ink);
  outline-offset: 3px;
}

/* ---------- Scrim ---------- */

.mega-nav__scrim {
  position: fixed;
  top: var(--mega-nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 180;
  background-color: var(--color-scrim);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  opacity: 0;
  pointer-events: none;
  will-change: opacity;
}

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

@media (max-width: 768px) {
  .mega-nav {
    flex-wrap: wrap;
    height: auto;
    padding-left: var(--mega-nav-pad-x-mobile);
    padding-right: var(--mega-nav-pad-x-mobile);
  }

  .mega-nav__logo {
    order: 1;
    display: flex;
    align-items: center;
    height: var(--mega-nav-height-mobile);
  }

  .mega-nav__burger {
    display: inline-flex;
    order: 2;
    margin-left: auto;
  }

  .mega-nav__actions {
    display: none;
  }

  .mega-nav__list-wrap {
    order: 3;
    display: block;
    width: 100%;
    height: auto;
  }

  .mega-nav__list {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    height: 0;
    border-top: 1px solid var(--color-border);
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
  }

  .mega-nav__dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    width: auto;
    border-top: 1px solid var(--color-border);
    border-bottom: none;
    overflow: hidden;
    transform-origin: top center;
    display: none;
    box-shadow: none;
  }

  .mega-nav[data-mobile-open="true"] .mega-nav__dropdown {
    display: block;
  }

  .mega-nav__indicator {
    display: none;
  }

  .mega-nav__item {
    flex-direction: column;
    align-items: stretch;
    height: auto;
  }

  .mega-nav__trigger {
    justify-content: space-between;
    height: 48px;
    padding: 0 1.25rem 0 0;
    border-bottom: 1px solid var(--color-border-soft);
  }

  .mega-nav__panel-body {
    flex-direction: column;
    gap: 1.5rem;
    padding: 1.25rem 1.25rem 1.5rem;
  }

  .mega-nav__columns {
    flex-direction: column;
    gap: 1.5rem;
  }

  .mega-nav__preview {
    display: none;
  }

  .mega-nav__scrim {
    display: none;
  }
}

/* ---------- Reduced motion ---------- */

@media (prefers-reduced-motion: reduce) {
  .mega-nav__trigger-arrow,
  .mega-nav__trigger,
  .mega-nav__link,
  .mega-nav__burger-line,
  .mega-nav__cta,
  .mega-nav__preview-cta,
  .mega-nav__text-link::after {
    transition: none;
  }
}