/* ===================================================================
   Navigation — sticky glass bar with gradient underline + mobile drawer
   =================================================================== */

.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 1000;
  display: flex; align-items: center;
  transition: background var(--t), border-color var(--t), box-shadow var(--t);
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(5,5,7,.78);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  border-bottom-color: var(--border);
  box-shadow: 0 8px 30px rgba(0,0,0,.4);
}

.nav-inner {
  width: 100%; max-width: var(--maxw); margin-inline: auto;
  padding-inline: var(--gutter);
  display: flex; align-items: center; justify-content: space-between; gap: 1.5rem;
}

.nav-logo { display: flex; align-items: center; gap: .7rem; flex-shrink: 0; }
.nav-logo img { height: 46px; width: auto; }
.nav-logo .wordmark {
  font-family: var(--font-display);
  font-size: 1.35rem; line-height: 1; letter-spacing: .02em;
}
.nav-logo .wordmark small { display: block; font-family: var(--font-sport); font-size: .58rem; letter-spacing: .3em; color: var(--text-muted); font-weight: 600; }

/* Desktop menu */
.nav-menu { display: flex; align-items: center; gap: .35rem; }
.nav-link {
  font-family: var(--font-sport);
  font-weight: 600;
  font-size: .95rem;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: .55rem .9rem;
  border-radius: 8px;
  position: relative;
  transition: color var(--t-fast);
}
.nav-link::after {
  content: ""; position: absolute; left: .9rem; right: .9rem; bottom: .35rem; height: 2px;
  background: var(--grad); border-radius: 2px;
  transform: scaleX(0); transform-origin: left; transition: transform var(--t);
}
.nav-link:hover, .nav-link.active { color: var(--text); }
.nav-link:hover::after, .nav-link.active::after { transform: scaleX(1); }

/* Dropdown */
.nav-item { position: relative; }
.has-drop > .nav-link::before { content: ""; }
.nav-drop {
  position: absolute; top: calc(100% + .4rem); left: 0;
  min-width: 220px;
  background: rgba(13,13,15,.96);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: .5rem;
  box-shadow: 0 20px 50px rgba(0,0,0,.6);
  opacity: 0; visibility: hidden; transform: translateY(8px);
  transition: opacity var(--t), transform var(--t), visibility var(--t);
}
.nav-item:hover .nav-drop, .nav-item:focus-within .nav-drop { opacity: 1; visibility: visible; transform: translateY(0); }
.nav-drop a {
  display: block; padding: .6rem .8rem; border-radius: 8px;
  font-family: var(--font-sport); font-weight: 500; font-size: .92rem;
  color: var(--text-muted); transition: var(--t-fast);
}
.nav-drop a:hover { background: var(--grad-soft); color: var(--text); }

.nav-actions { display: flex; align-items: center; gap: .8rem; flex-shrink: 0; }

/* Hamburger */
.nav-toggle { display: none; width: 44px; height: 44px; border-radius: 10px; position: relative; }
.nav-toggle span {
  position: absolute; left: 11px; right: 11px; height: 2px; background: var(--text); border-radius: 2px;
  transition: transform var(--t), opacity var(--t-fast), top var(--t);
}
.nav-toggle span:nth-child(1) { top: 15px; }
.nav-toggle span:nth-child(2) { top: 21px; }
.nav-toggle span:nth-child(3) { top: 27px; }
body.menu-open .nav-toggle span:nth-child(1) { top: 21px; transform: rotate(45deg); }
body.menu-open .nav-toggle span:nth-child(2) { opacity: 0; }
body.menu-open .nav-toggle span:nth-child(3) { top: 21px; transform: rotate(-45deg); }

/* Mobile drawer */
@media (max-width: 920px) {
  .nav-toggle { display: block; }
  .nav-menu {
    position: fixed; inset: var(--nav-h) 0 0 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: rgba(5,5,7,.98);
    backdrop-filter: blur(20px);
    padding: 1.2rem var(--gutter) 2rem;
    overflow-y: auto;
    transform: translateX(100%);
    transition: transform var(--t);
    border-left: 1px solid var(--border);
  }
  body.menu-open .nav-menu { transform: translateX(0); }
  .nav-item { width: 100%; }
  .nav-link { display: block; padding: 1rem .2rem; font-size: 1.4rem; border-bottom: 1px solid var(--border); }
  .nav-link::after { display: none; }
  .nav-drop {
    position: static; opacity: 1; visibility: visible; transform: none;
    background: transparent; border: none; box-shadow: none; padding: .2rem 0 .6rem 1rem; min-width: 0;
    max-height: 0; overflow: hidden; transition: max-height var(--t);
  }
  .nav-item.open .nav-drop { max-height: 600px; }
  .nav-drop a { font-size: 1.05rem; padding: .5rem; }
  .nav-actions .btn { display: none; }
}