@import url('https://fonts.googleapis.com/css2?family=Kaisei+Decol&family=Roboto:wght@300;400;500;700&display=swap');

/* ----------------------------- */
/* Global reset & root variables */
/* ----------------------------- */

html, body { margin: 0; padding: 0; }

:root{
  --nav-h: 60px;
  --topbar-h: 34px;
  --brand-dark: #133951;
  --brand-gold: #cbb77d;
}

/* ------------------------ */
/* TOPBAR (primary ribbon) */
/* ------------------------ */

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--topbar-h);
  padding: 0 22px;
  font-size: 13px;
  color: #fff;
  border-bottom: 0.5px solid rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(12px) saturate(180%);
  -webkit-backdrop-filter: blur(12px) saturate(180%);
  background: linear-gradient(
    to right,
    rgba(19, 57, 81, 0.78) 0%,
    rgba(19, 57, 81, 0.82) 40%,
    rgba(19, 57, 81, 0.86) 70%,
    rgba(19, 57, 81, 0.92) 100%
  );
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 10px;
}
.topbar-left a {
  color: var(--brand-gold);
  text-decoration: none;
  transition: color .2s;
}
.topbar-left a:hover { color: #f0dfaa; }
.topbar-left span { color: rgba(255,255,255,.45); }

/* Right-side shortcuts */
.topbar-right {
  display: flex;
  align-items: center;
  gap: 18px;
  text-transform: uppercase;
  letter-spacing: .6px;
}
.topbar-right a {
  color: var(--brand-gold);
  text-decoration: none;
  font-size: 12.8px;
  padding: 3px 6px;
  border-radius: 4px;
  transition: color .2s, opacity .2s;
}
.topbar-right a:hover {
  color: #f6e8b8;
  opacity: .9;
}

/* ------------------------------- */
/* NAVBAR (primary navigation bar) */
/* ------------------------------- */

.navbar {
  position: sticky;
  top: var(--topbar-h);
  z-index: 25;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 20px;
  min-height: var(--nav-h);
  border-bottom: .2px solid rgba(0,0,0,.08);
  backdrop-filter: blur(14px) saturate(180%);
  -webkit-backdrop-filter: blur(14px) saturate(180%);
  background-color: rgba(255,255,255,.82);
  box-shadow: 0 1px 20px rgba(19,57,81,.05);
}

/* Branding (logo + label) */
.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: #000;
  font-size: 18px;
  font-weight: 500;
}
.nav-brand img {
  width: 50px;
  height: 50px;
  border-radius: 10px;
  display: block;
}

/* Nav links row */
.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  text-transform: uppercase;
  letter-spacing: .6px;
}
.nav-links a {
  color: #000;
  text-decoration: none;
  font-size: 14px;
  padding: 8px 10px;
  border-radius: 6px;
  position: relative;
  transition: color .2s, opacity .2s;
}
.nav-links a:hover {
  color: var(--brand-dark);
  opacity: .85;
}

/* Active link underline */
.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 20%;
  right: 20%;
  bottom: 4px;
  height: 2px;
  background-color: var(--brand-gold);
  border-radius: 2px;
}

/* ------------------------------ */
/* Hamburger trigger (base state) */
/* ------------------------------ */

.nav-toggle { display: none; }

.nav-burger {
  display: none;
  cursor: pointer;
  padding: 8px;
}

.nav-burger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--brand-dark);
  margin: 5px 0;
  transition: transform .25s, opacity .25s;
}

/* ------------------ */
/* MOBILE BEHAVIOURS  */
/* ------------------ */

@media (max-width: 900px) {
  /* Topbar compresses + hides right side */
  .topbar {
    position: static;
    height: auto;
    padding: 6px 12px;
    gap: 4px;
    background: linear-gradient(
      to right,
      rgba(19, 57, 81, 0.76) 0%,
      rgba(19, 57, 81, 0.80) 50%,
      rgba(19, 57, 81, 0.88) 100%
    );
  }
  .topbar-right { display: none; }
  .topbar-left {
    justify-content: center;
    flex-wrap: wrap;
    font-size: 12px;
    margin: 0 auto;
    text-align: center;
  }
  .topbar-left span { display: inline-block; }

  /* Navbar pinned to top */
  .navbar {
    position: sticky;
    top: 0;
    z-index: 50;
    box-shadow: none;
    overflow: visible;
  }

  /* Burger icon visible */
  .nav-burger {
    display: block;
    position: relative;
    z-index: 51;
  }

  /* Dropdown nav menu */
  .nav-links {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    padding: 10px 14px;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    backdrop-filter: blur(14px) saturate(180%);
    -webkit-backdrop-filter: blur(14px) saturate(180%);
    background-color: rgba(255, 255, 255, 0.96);
    border-top: 1px solid rgba(0, 0, 0, .06);
    box-shadow: 0 10px 18px rgba(0, 0, 0, .06);
    transition: max-height .30s ease, opacity .22s ease;
    z-index: 49;
  }

  .nav-toggle:checked ~ .nav-links {
    max-height: 60vh;
    opacity: 1;
  }

  /* Mobile link spacing */
  .nav-links a {
    padding: 12px 10px;
    border-radius: 8px;
  }

  /* Active link mobile dot indicator */
  .nav-links a.active::after {
    position: static;
    display: inline-block;
    width: 8px;
    height: 8px;
    margin-left: 6px;
    content: "";
    border-radius: 50%;
    background-color: var(--brand-gold);
  }

  /* Burger → X animation */
  .nav-toggle:checked + .nav-burger span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .nav-toggle:checked + .nav-burger span:nth-child(2) {
    opacity: 0;
  }
  .nav-toggle:checked + .nav-burger span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }
}