/* ── Header: fixed bar ── */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background-color: var(--secondary-color);
  box-sizing: border-box;
}

header,
header * {
  font-family: "Poppins", sans-serif;
}

header a {
  margin: 0;
  font-weight: 400;
}

.nav__bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 0;
}

.nav__logo {
  flex-shrink: 0;
  display: flex;
  z-index: 2;
}

.logo {
  height: 64px;
  transition: opacity 0.2s ease;
}

/* ── Hamburger ── */
.hamburger {
  padding: 10px;
  min-width: 44px;
  min-height: 44px;
  display: none;
  cursor: pointer;
  font: inherit;
  color: inherit;
  text-transform: none;
  background-color: transparent;
  border: 0;
  margin: auto 0 auto 24px;
  overflow: visible;
  z-index: 2;
}

.hamburger-outer {
  width: 30px;
  height: 24px;
  margin-top: 10px;
  display: inline-block;
  position: relative;
}

.hamburger-inner {
  display: block;
  top: 50%;
  margin-top: -2px;
}

.hamburger-inner,
.hamburger-inner::before,
.hamburger-inner::after {
  width: 30px;
  height: 3px;
  background-color: #fefefe;
  border-radius: 2px;
  position: absolute;
  transition-property: transform, opacity;
  transition-duration: 0.3s;
  transition-timing-function: cubic-bezier(0.55, 0.055, 0.675, 0.19);
}

.hamburger-inner::before,
.hamburger-inner::after {
  content: "";
  display: block;
}

.hamburger-inner::before {
  top: -10px;
}

.hamburger-inner::after {
  bottom: -10px;
}

/* Stick animation */
.hamburger--stick .hamburger-inner {
  top: 2px;
}

.hamburger--stick .hamburger-inner::before {
  top: 10px;
}

.hamburger--stick .hamburger-inner::after {
  top: 20px;
}

.hamburger--stick.is-active .hamburger-inner {
  transform: translate3d(0, 10px, 0) rotate(45deg);
}

.hamburger--stick.is-active .hamburger-inner::before {
  opacity: 0;
  transform: translate3d(0, 0, 0);
}

.hamburger--stick.is-active .hamburger-inner::after {
  transform: translate3d(0, -20px, 0) rotate(-90deg);
}

/* ── Desktop nav ── */
.nav__menu {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  width: 100%;
  justify-content: flex-end;
}

span {
  font-family: inherit;
  display: inline-block;
}

ul.topnav {
  list-style-type: none;
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  gap: 0.25rem;
  align-items: center;
}

ul.topnav li {
  list-style: none;
}

ul.topnav li a {
  display: block;
  color: white;
  text-align: center;
  padding: 10px 14px;
  text-decoration: none;
  border-radius: 8px;
  transition: color 0.25s ease, background-color 0.25s ease;
  white-space: nowrap;
}

ul.topnav li a:hover:not(.active) {
  color: var(--primary-color);
}

ul.topnav li a.active {
  color: var(--primary-color);
}

/* ── Contact CTA button ── */
.nav__cta {
  flex-shrink: 0;
  margin-left: 1rem;
}


/* ── Backdrop ── */
.nav__backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.4);
  z-index: -1;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  pointer-events: none;
}

.nav__backdrop.is-visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

/* ── Mobile styles ── */
@media screen and (max-width: 991px) {
  .nav__bar {
    flex-wrap: wrap;
  }

  .hamburger {
    display: flex;
  }

  .nav__menu {
    position: fixed;
    top: var(--nav-height, 0);
    left: 0;
    right: 0;
    bottom: 0;
    flex-direction: column;
    justify-content: flex-start;
    align-items: stretch;
    background-color: var(--secondary-color);
    padding: 1rem 2rem 2rem;
    overflow-y: auto;

    /* Hidden by default */
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.35s ease, visibility 0.35s ease, transform 0.35s ease;
    z-index: 1;
  }

  .nav__menu.is-open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  ul.nav-links {
    flex-direction: column;
    width: 100%;
    text-align: center;
    padding: 0;
    margin: 0;
    gap: 0;
  }

  ul.nav-links li {
    width: 100%;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.3s ease, transform 0.3s ease;
  }

  /* Staggered entry for each nav item */
  .nav__menu.is-open li {
    opacity: 1;
    transform: translateY(0);
  }
  .nav__menu.is-open li:nth-child(1) { transition-delay: 0.05s; }
  .nav__menu.is-open li:nth-child(2) { transition-delay: 0.1s; }
  .nav__menu.is-open li:nth-child(3) { transition-delay: 0.15s; }
  .nav__menu.is-open li:nth-child(4) { transition-delay: 0.2s; }
  .nav__menu.is-open li:nth-child(5) { transition-delay: 0.25s; }
  .nav__menu.is-open li:nth-child(6) { transition-delay: 0.3s; }
  .nav__menu.is-open li:nth-child(7) { transition-delay: 0.35s; }

  /* Reset delays on close for snappy exit */
  .nav__menu:not(.is-open) li {
    transition-delay: 0s;
  }

  ul.nav-links li a {
    display: block;
    padding: 18px 16px;
    text-align: left;
    color: white;
    text-decoration: none;
    font-size: 1.1rem;
    border-radius: 0;
  }

  ul.nav-links li a:hover {
    background-color: rgba(255, 255, 255, 0.08);
    color: var(--primary-color);
  }

  ul.topnav li a:hover:not(.active) {
    color: var(--primary-color);
  }

  .nav__cta {
    display: none !important;
  }
}