/* ==========================================================================
   Layout — site header / primary navigation / footer
   ========================================================================== */

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background:
    linear-gradient(rgba(248, 244, 236, 0.86), rgba(248, 244, 236, 0.86)),
    url("../images/guilloche.svg");
  background-size: auto, 480px 240px;
  -webkit-backdrop-filter: saturate(1.2) blur(10px);
  backdrop-filter: saturate(1.2) blur(10px);
  transition: box-shadow 0.3s var(--ease);
}

/* Pastel security-strip + gold hairline under the header */
.site-header::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background:
    linear-gradient(90deg, var(--gold-500), var(--gold-300) 50%, var(--gold-500)) bottom / 100% 1px no-repeat,
    linear-gradient(90deg, var(--guilloche-pink), var(--guilloche-sky), var(--guilloche-mint), var(--guilloche-lilac), var(--guilloche-pink));
}

.site-header.is-scrolled {
  box-shadow: 0 10px 30px -18px rgba(15, 26, 58, 0.45);
}

.site-header__inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
}

.brand img {
  height: 56px;
  width: auto;
  transition: transform 0.4s var(--ease);
}

.brand:hover img {
  transform: translateY(-1px) scale(1.015);
}

/* ---------- Primary nav (desktop) ---------- */

.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.site-nav__cover {
  display: none;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-nav__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 10px 12px;
  font-family: var(--font-display);
  font-size: 0.86rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
  transition: color 0.25s var(--ease);
}

.site-nav__num {
  display: none;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  color: var(--gold-600);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 4px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--teal-600), var(--violet-500));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s var(--ease);
}

.site-nav__link:hover {
  color: var(--navy-800);
}

.site-nav__link:hover::after {
  transform: scaleX(1);
}

.site-nav__link[aria-current="page"] {
  color: var(--navy-800);
}

.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--gold-500);
}

.nav-toggle,
.nav-backdrop {
  display: none;
}

/* ---------- Mobile / tablet nav: drawer styled as a passport cover ---------- */

@media (max-width: 1024px) {
  /* backdrop-filter would make the header the containing block for the
     fixed-position drawer below, trapping it inside the header's height. */
  .site-header {
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
    background:
      linear-gradient(rgba(248, 244, 236, 0.95), rgba(248, 244, 236, 0.95)),
      url("../images/guilloche.svg");
    background-size: auto, 480px 240px;
  }

  .brand img {
    height: 44px;
  }

  .nav-backdrop {
    display: block;
  }

  .nav-toggle {
    position: relative;
    z-index: 2;
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 46px;
    height: 46px;
    border-radius: 12px;
    background: var(--navy-800);
    box-shadow: inset 0 0 0 1px rgba(201, 163, 82, 0.55), var(--shadow-sm);
  }

  .nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    border-radius: 2px;
    background: var(--gold-300);
    transition: transform 0.35s var(--ease), opacity 0.2s;
  }

  .nav-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .nav-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  /* Sidebar drawer sliding in from the right. It sits under the header's
     toggle button (z-index 1 vs 2) so the same button becomes the close X. */
  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
    width: min(86vw, 360px);
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
    padding: calc(var(--header-h) + 4px) 24px calc(28px + env(safe-area-inset-bottom));
    overflow-y: auto;
    overscroll-behavior: contain;
    background:
      radial-gradient(400px 300px at 100% 0%, rgba(79, 176, 182, 0.18), transparent 60%),
      radial-gradient(400px 400px at 0% 100%, rgba(106, 90, 168, 0.25), transparent 60%),
      var(--navy-900);
    color: var(--gold-300);
    box-shadow: -24px 0 60px -20px rgba(11, 20, 48, 0.6);
    visibility: hidden;
    transform: translateX(100%);
    transition: transform 0.45s var(--ease), visibility 0s linear 0.45s;
  }

  .site-nav.is-open {
    visibility: visible;
    transform: none;
    transition: transform 0.45s var(--ease), visibility 0s;
  }

  .nav-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(11, 20, 48, 0.55);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.35s var(--ease), visibility 0s linear 0.35s;
  }

  .nav-backdrop.is-open {
    opacity: 1;
    visibility: visible;
    transition: opacity 0.35s var(--ease), visibility 0s;
  }

  /* Gold-foil inset frame + rosette, like a passport cover */
  .site-nav::before {
    content: "";
    position: absolute;
    inset: 12px;
    border: 1px solid rgba(201, 163, 82, 0.45);
    border-radius: 18px;
    pointer-events: none;
  }

  .site-nav::after {
    content: "";
    position: absolute;
    right: -140px;
    bottom: -140px;
    width: 360px;
    height: 360px;
    background: var(--gold-500);
    opacity: 0.12;
    -webkit-mask: url("../images/rosette.svg") center / contain no-repeat;
    mask: url("../images/rosette.svg") center / contain no-repeat;
    pointer-events: none;
  }

  .site-nav__cover {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 8px 0 24px;
    text-align: center;
  }

  .site-nav__cover-hindi {
    font-family: var(--font-hindi);
    font-size: 1rem;
    letter-spacing: 0.06em;
    color: var(--gold-300);
  }

  .site-nav__cover-title {
    font-family: var(--font-display);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.4em;
    color: var(--gold-500);
  }

  .site-nav__list {
    position: relative;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .site-nav__list li + li {
    border-top: 1px dashed rgba(201, 163, 82, 0.28);
  }

  .site-nav__link {
    display: flex;
    gap: 16px;
    padding: 16px 8px;
    font-size: 1.05rem;
    letter-spacing: 0.1em;
    color: var(--gold-300);
  }

  .site-nav__num {
    display: inline;
    color: var(--teal-400);
  }

  .site-nav__link::after {
    display: none;
  }

  .site-nav__link:hover,
  .site-nav__link[aria-current="page"] {
    color: #fff;
  }

  .site-nav__link[aria-current="page"]::before {
    content: "";
    position: absolute;
    right: 8px;
    top: 50%;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--gold-500);
    transform: translateY(-50%);
    box-shadow: 0 0 0 4px rgba(201, 163, 82, 0.2);
  }

  .site-nav .btn {
    position: relative;
    margin-top: 24px;
    width: 100%;
  }
}

@media (max-width: 380px) {
  .brand img {
    height: 38px;
  }
}

/* ---------- Footer: passport-cover navy ---------- */

.site-footer {
  position: relative;
  overflow: hidden;
  margin-top: clamp(56px, 8vw, 96px);
  background:
    radial-gradient(700px 400px at 0% 0%, rgba(79, 176, 182, 0.14), transparent 60%),
    radial-gradient(700px 400px at 100% 100%, rgba(106, 90, 168, 0.22), transparent 60%),
    var(--navy-900);
  color: rgba(230, 207, 143, 0.82);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--gold-600), var(--gold-300), var(--gold-600));
}

.site-footer__rosette {
  position: absolute;
  right: -140px;
  top: -140px;
  width: 460px;
  height: 460px;
  background: var(--gold-500);
  opacity: 0.08;
  -webkit-mask: url("../images/rosette.svg") center / contain no-repeat;
  mask: url("../images/rosette.svg") center / contain no-repeat;
  pointer-events: none;
}

.site-footer__grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  padding-block: clamp(48px, 7vw, 80px) 40px;
}

.site-footer__title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold-300);
}

.site-footer__hindi {
  margin-top: 4px;
  font-family: var(--font-hindi);
  font-size: 0.95rem;
  color: var(--gold-500);
}

.site-footer__tag {
  margin-top: 18px;
  max-width: 34ch;
  color: rgba(255, 255, 255, 0.68);
}

.site-footer__heading {
  margin-bottom: 16px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--teal-400);
}

.site-footer__links {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 20px;
}

.site-footer__links a {
  font-family: var(--font-display);
  font-size: 0.92rem;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.82);
  transition: color 0.2s;
}

.site-footer__links a:hover {
  color: var(--gold-300);
}

.site-footer__status {
  color: rgba(255, 255, 255, 0.68);
}

.site-footer__status .badge {
  margin-bottom: 12px;
}

.site-footer__mrz {
  position: relative;
  padding: 18px var(--gutter);
  border-top: 1px solid rgba(201, 163, 82, 0.22);
  border-bottom: 1px solid rgba(201, 163, 82, 0.22);
  font-family: var(--font-mono);
  font-size: clamp(0.62rem, 1.6vw, 0.95rem);
  letter-spacing: 0.18em;
  line-height: 1.7;
  white-space: nowrap;
  overflow: hidden;
  text-align: center;
  color: rgba(230, 207, 143, 0.38);
}

.site-footer__bottom {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 24px;
  padding-block: 20px 28px;
  padding-bottom: calc(28px + env(safe-area-inset-bottom));
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.5);
}

@media (max-width: 860px) {
  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
  }

  .site-footer__brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 520px) {
  .site-footer__grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
}