/* ============================================================
  navbar.css — GPM Site Header & Navigation
   Link this in every page: <link rel="stylesheet" href="navbar.css"/>
   ============================================================ */

/* ── VARIABLES (shared with rest of site) ── */
:root {
  /* Match the site's original darker/blueish theme from style.css */
  --cream:    #2f3b46; /* header background (blueish) */
  --ink:      #ede8de; /* light text on dark background */
  --warm-mid: #8b7355;
  --gold:     #c9a84c;
  --rust:     #b5451b;
  --pale:     #ede8de;
  --shadow:   rgba(0, 0, 0, 0.25);
  --header-h: 120px; /* match `css/style.css` header height */
}

/* ── HEADER WRAPPER ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  background: var(--cream);
  border-bottom: 1px solid rgba(139, 115, 85, 0.25);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  animation: headerSlideDown 0.5s ease both;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  padding: 0 5vw;
  gap: 1.5rem;
}

/* ── LOGO ── */
.logo {
  display: flex;
  flex-direction: column;
  line-height: 1;
  text-decoration: none;
  flex-shrink: 0;
}

.logo-main {
  font-family: 'Playfair Display', serif;
  font-size: 1.5rem;
  font-weight: 900;
  letter-spacing: 0.04em;
  color: var(--ink);
  transition: color 0.2s;
}
.logo:hover .logo-main { color: var(--rust); }

.logo-sub {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--warm-mid);
  margin-top: 3px;
  white-space: nowrap;
}

/* ── NAV LINKS ── */
.site-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-link {
  text-decoration: none;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--warm-mid);
  padding: 0.4rem 0.75rem;
  border-radius: 4px;
  position: relative;
  transition: color 0.2s ease, background 0.2s ease;
}

/* Hover state */
.nav-link:hover {
  color: var(--ink);
  background: rgba(139, 115, 85, 0.08);
}

/* Active page indicator */
.nav-link.active {
  color: var(--ink);
  font-weight: 600;
}
.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0.75rem;
  right: 0.75rem;
  height: 2px;
  background: var(--gold);
  border-radius: 2px;
}

/* ── HAMBURGER (toggle) ── */
.nav-toggle {
  display: none; /* hidden by default, shown on small screens */
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 38px;
  height: 38px;
  padding: 6px;
  background: transparent;
  border-radius: 6px;
  cursor: pointer;
  flex-shrink: 0;
  transition: border-color 0.2s, background 0.15s;
}
.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--pale);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

/* Hamburger → X when open */
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── MOBILE RESPONSIVE ── */
@media (max-width: 768px) {

  .nav-toggle {
    display: flex;
    position: fixed;
    top: calc(var(--header-h) / 2 - 19px);
    right: 18px;
    z-index: 1200;
    border: 1px solid rgba(255,255,255,0.12);
    background: transparent;
  }

  .site-nav {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--cream);
    border-bottom: 1px solid rgba(139, 115, 85, 0.2);
    padding: 0.5rem 5vw 1rem;
    box-shadow: 0 8px 24px var(--shadow);

    /* Hidden by default */
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    pointer-events: none;
    transition: max-height 0.35s ease, opacity 0.3s ease;
  }

  .site-nav.open {
    max-height: 400px;
    opacity: 1;
    pointer-events: all;
  }

  .nav-link {
    padding: 0.75rem 0.5rem;
    border-bottom: 1px solid rgba(139, 115, 85, 0.1);
    border-radius: 0;
    font-size: 0.82rem;
  }
  .nav-link:last-child { border-bottom: none; }

  .nav-link.active::after {
    display: none;
  }
  .nav-link.active {
    color: var(--rust);
    border-left: 3px solid var(--gold);
    padding-left: calc(0.5rem + 3px);
  }

  .logo-sub {
    display: block;
    font-size: 0.85rem;
    color: var(--pale);
    white-space: normal;
    margin-top: 4px;
  }

  /* Mobile-specific logo adjustments to keep subtitle on one line */
  .logo-img {
    width: 48px;
    height: 48px;
    object-fit: contain;
    border-radius: 4px;
  }

  .logo-main {
    font-size: 1.25rem;
    color: var(--pale);
    line-height: 1;
  }

  .logo-sub {
    /* Force single-line subtitle that scales to fit the available width */
    font-size: clamp(0.4rem, 2.4vw, 0.8rem);
    white-space: nowrap;
    max-width: calc(100vw - 140px);
    margin-top: 3px;
    display: block;
    color: var(--warm-mid); /* match desktop color */
    overflow: visible;
    letter-spacing: 0.18em;
    text-transform: uppercase;
  }
}

/* ── ENTRY ANIMATION ── */
@keyframes headerSlideDown {
  from { opacity: 0; transform: translateY(-100%); }
  to   { opacity: 1; transform: translateY(0); }
}