/* ==========================================================================
   Header: logo, navigation with mega menu, and the three account CTAs
   (Log in, Sign up, Get a demo). Mobile keeps "Get a demo" visible next to
   the menu button; Sign up and Log in move into the drawer.
   ========================================================================== */

.site-header {
  position: sticky; top: 0; z-index: 100;
  border-bottom: 1px solid transparent;
  transition: border-color .2s var(--ease);
}
/* Blur lives on a pseudo-element: backdrop-filter on the header itself would
   become the containing block for the fixed mobile drawer. */
.site-header::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: saturate(1.4) blur(12px);
  -webkit-backdrop-filter: saturate(1.4) blur(12px);
}
.site-header[data-scrolled="true"] { border-bottom-color: var(--c-line); }

.site-header__inner {
  display: flex; align-items: center; gap: 24px;
  height: var(--header-h);
  max-width: calc(var(--container-wide) + var(--gutter) * 2);
  margin-inline: auto; padding-inline: var(--gutter);
}
.site-header__logo { flex: none; }
.site-header__logo img { width: 142px; height: auto; }

.site-header__actions { display: flex; align-items: center; gap: 10px; margin-left: auto; }
.site-header__login {
  display: inline-flex; align-items: center; gap: 4px; margin-right: 8px;
  padding-bottom: 1px; border-bottom: 1px solid currentColor;
  font-size: 1rem; text-decoration: none; transition: opacity .15s;
}
.site-header__login svg { width: 12px; height: 12px; }
.site-header__login:hover { opacity: .7; }

/* Hamburger */
.nav-toggle {
  display: none; position: relative; width: 44px; height: 44px;
  border: 0; border-radius: 50%; background: transparent; cursor: pointer;
}
.nav-toggle span {
  position: absolute; left: 12px; right: 12px; height: 2px; border-radius: 2px;
  background: var(--c-ink); transition: transform .25s var(--ease), top .25s var(--ease);
}
.nav-toggle span:first-child { top: 17px; }
.nav-toggle span:last-child  { top: 25px; }
.nav-toggle[aria-expanded="true"] span:first-child { top: 21px; transform: rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:last-child  { top: 21px; transform: rotate(-45deg); }

/* Desktop navigation */
.nav { display: flex; align-items: center; }
.nav__list { display: flex; align-items: center; gap: 2px; }
.nav__item { position: static; }
.nav__link {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 10px 14px; border: 0; border-radius: var(--r-pill);
  background: transparent; cursor: pointer;
  font: 500 .9375rem/1 var(--f-sans); color: var(--c-ink); text-decoration: none;
  transition: background-color .15s var(--ease);
}
.nav__link:hover, .nav__item[data-open="true"] > .nav__link { background: var(--c-sand); }
.nav__link[aria-current="page"], .nav__link[data-active="true"] { color: var(--c-purple); }
.nav__caret { width: 12px; height: 12px; transition: transform .2s var(--ease); }
.nav__item[data-open="true"] .nav__caret { transform: rotate(180deg); }

.nav__mobile-actions { display: none; }

@media (min-width: 1101px) {
  .nav { margin-left: 18px; }
  .nav__item--has-sub { position: relative; }
  .nav__item--mega { position: static; }

  .nav__panel {
    position: absolute; top: calc(100% + 6px); left: 0; z-index: 10;
    min-width: 260px; padding: 10px;
    background: var(--c-white); border: 1px solid var(--c-line); border-radius: var(--r-lg);
    box-shadow: var(--shadow-lg);
    opacity: 0; visibility: hidden; transform: translateY(6px);
    transition: opacity .18s var(--ease), transform .18s var(--ease), visibility .18s;
  }
  .nav__item--mega .nav__panel {
    left: 50%; top: calc(var(--header-h) - 6px);
    width: min(1120px, calc(100vw - 48px)); padding: 0;
    transform: translate(-50%, 6px);
  }
  .nav__item[data-open="true"] .nav__panel,
  .nav__item--has-sub:focus-within .nav__panel { opacity: 1; visibility: visible; transform: translateY(0); }
  .nav__item--mega[data-open="true"] .nav__panel,
  .nav__item--mega:focus-within .nav__panel { transform: translate(-50%, 0); }

  .dropdown a {
    display: block; padding: 10px 14px; border-radius: var(--r-sm);
    font-weight: 500; text-decoration: none;
  }
  .dropdown a:hover, .dropdown a[aria-current="page"] { background: var(--c-sand); color: var(--c-purple); }

  .mega { display: grid; grid-template-columns: repeat(3, 1fr) 1.05fr; }
  .mega__group { padding: 28px 22px; }
  .mega__title {
    margin: 0 10px 12px; font-size: var(--t-label); font-weight: 600;
    letter-spacing: .08em; text-transform: uppercase; color: var(--c-muted);
  }
  .mega__link { display: block; padding: 10px; border-radius: var(--r-sm); text-decoration: none; }
  .mega__link:hover, .mega__link[aria-current="page"] { background: var(--c-sand); }
  .mega__label { display: block; font-weight: 600; }
  .mega__link:hover .mega__label { color: var(--c-purple); }
  .mega__text { display: block; margin-top: 2px; font-size: var(--t-small); line-height: 1.4; color: var(--c-muted); }
  .mega__promo {
    display: flex; flex-direction: column; gap: 14px; justify-content: flex-end;
    margin: 10px; padding: 28px; border-radius: var(--r-md);
    background: var(--c-night) radial-gradient(120% 80% at 100% 0%, rgba(114,49,190,.6), transparent 60%);
    color: var(--c-white); text-decoration: none;
  }
  .mega__promo-kicker { font-size: var(--t-label); letter-spacing: .08em; text-transform: uppercase; color: #D9D2E6; font-weight: 600; }
  .mega__promo-title { font-size: 1.16rem; font-weight: 600; line-height: 1.2; letter-spacing: -.02em; }
  .mega__promo .text-link { color: var(--c-white); }
}

/* Tablet + mobile: full-height drawer */
@media (max-width: 1100px) {
  .nav-toggle { display: inline-block; }
  .site-header__login { display: none; }

  .nav {
    position: fixed; inset: var(--header-h) 0 0 0; z-index: 99;
    flex-direction: column; align-items: stretch;
    padding: 8px var(--gutter) 28px; overflow-y: auto;
    background: var(--c-white);
    opacity: 0; visibility: hidden; transform: translateY(-8px);
    transition: opacity .2s var(--ease), transform .2s var(--ease), visibility .2s;
  }
  .nav[data-open="true"] { opacity: 1; visibility: visible; transform: none; }

  .nav__list { flex-direction: column; align-items: stretch; gap: 0; }
  .nav__item { border-bottom: 1px solid var(--c-line); }
  .nav__link {
    width: 100%; justify-content: space-between;
    padding: 20px 2px; border-radius: 0; font-size: 1rem; font-weight: 600;
  }
  .nav__link:hover, .nav__item[data-open="true"] > .nav__link { background: transparent; }

  .nav__panel { display: none; padding-bottom: 14px; }
  .nav__item[data-open="true"] .nav__panel { display: block; }
  .mega__group + .mega__group { margin-top: 14px; }
  .mega__title { margin-bottom: 6px; font-size: var(--t-label); font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--c-muted); }
  .mega__link, .dropdown a { display: block; padding: 9px 0; text-decoration: none; font-weight: 500; }
  .mega__text, .mega__promo { display: none; }

  .nav__mobile-actions { display: grid; gap: 10px; margin-top: 28px; }
  .nav__mobile-login { padding: 12px; text-align: center; font-weight: 600; text-decoration: none; }
}

@media (max-width: 575px) {
  .site-header__signup { display: none; }
}
@media (max-width: 420px) {
  .site-header__logo img { width: 132px; }
  .site-header__actions .btn--dark { padding-inline: 14px; }
}