/* ============================ */
/* ===== NAVIGATION START ===== */
/* ============================ */

.header{ position: relative; z-index: 1000; }

.nav{
  position: absolute; top: 0; width: 100%;
  background: var(--nav-bg);
  border-bottom: 1px solid var(--nav-border);
}

.nav-inner{
  margin: 0 auto; padding: var(--space-2) var(--space-3);
  max-width: var(--max-menu-w);
  display: flex; align-items: center; gap: var(--space-3);
  position: relative;
  overflow: visible; /* prevent dropdown clipping */
}

/* Toggle (mobile) */
.nav-toggle{
  display: none;
  border: 1px solid var(--nav-border);
  background: transparent; color: var(--text);
  font-size: 20px; line-height: 1;
  padding: 8px 10px; border-radius: var(--radius-m);
  cursor: pointer; transition: background var(--speed);
}
.nav-toggle:hover{ background: rgba(255,255,255,.08); }

/* Menus */
.menu{ list-style: none; display: flex; gap: 18px; align-items: center; }
.menu-left{ flex: 1 1 0; }
.menu-right{ flex: 1 1 0; justify-content: flex-end; margin-left: auto; }

.menu a{ color: var(--text); text-decoration: none; }
.menu a:hover{ color: #fff; text-decoration: underline; text-underline-offset: 3px; }

/* Brand logo */
.menu-left .brand{ display: inline-flex; align-items: center; justify-content: center; }
.menu-left .brand img{
  height: var(--logo-size); width: auto; display: block;
  filter: drop-shadow(0 2px 8px var(--shadow));
}

/* Items */
.menu-right > li{ position: relative; }
.menu-right > li > a,
.menu-right > li > .sub-toggle{
  display: inline-flex; align-items: center; gap: 6px;
  padding: 10px 8px; border-radius: var(--radius-m);
  color: var(--text); background: transparent; border: 0;
  cursor: pointer; font: inherit;
  transition: background var(--speed), color var(--speed), transform var(--speed);
  white-space: nowrap;
}
.menu-right > li > a:hover,
.menu-right > li > .sub-toggle:hover{ background: rgba(0,0,0,.8); }
.menu-right .caret{ font-size: .85em; transition: transform var(--speed); }

/* Submenus: hover panel (desktop) */
.submenu{
  position: absolute; top: calc(100% + 10px); left: 0;
  min-width: 220px; padding: var(--space-2);
  background: var(--dropdown-bg);
  border: 1px solid var(--dropdown-border);
  border-radius: var(--radius-l);
  box-shadow: 0 10px 30px rgba(0,0,0,.35);
  visibility: hidden; opacity: 0; transform: translateY(-6px);
  transition: opacity var(--speed), transform var(--speed), visibility var(--speed);
  z-index: 10;
  backdrop-filter: blur(6px);
}
.submenu li{ list-style: none; }
.submenu a{
  display: block; padding: 10px 12px; border-radius: var(--radius-s);
  color: var(--text-muted);
}
.submenu a:hover{ color: #fff; background: rgba(255,255,255,.06); }

/* Show on hover/focus (desktop) */
.has-sub:hover > .submenu,
.has-sub:focus-within > .submenu{ visibility: visible; opacity: 1; transform: translateY(0); }
.has-sub:hover > .sub-toggle .caret,
.has-sub:focus-within > .sub-toggle .caret{ transform: rotate(180deg); }

/* ====== MOBILE / TABLET ====== */
@media (max-width: 1200px){
  .nav-inner{ padding: var(--space-2) 14px; }

  /* show toggle */
  .nav-toggle{ display: inline-flex; align-items: center; justify-content: center; }

  /* grid layout: toggle | brand | gap  + panel row */
  .nav-inner{
    display: grid;
    grid-template-columns: auto 1fr auto;
    grid-template-areas:
      "toggle brand gap"
      "panel panel panel";
    row-gap: 10px;
  }
  #nav-toggle{ grid-area: toggle; }
  .menu-left{ grid-area: brand; justify-content: flex-start; }
  .menu-right{ grid-area: panel; width: 100%; }

  /* collapsed panel */
  .menu-right{
    flex-direction: column; align-items: stretch; gap: 6px;
    max-height: 0; overflow: hidden;
    border-top: 1px solid var(--nav-border);
    padding-top: 0; margin-top: 6px;
    transition: max-height var(--speed) ease, padding var(--speed) ease;
  }
  .nav.nav--open .menu-right{
    padding-top: 10px;
    max-height: 75vh;
    overflow: auto;
  }

  /* tiles */
  .menu-right > li > a,
  .menu-right > li > .sub-toggle{
    justify-content: space-between;
    padding: 12px 12px;
    border: 1px solid transparent;
    border-radius: 12px;
  }
  .menu-right > li > a:hover,
  .menu-right > li > .sub-toggle:hover{
    background: rgba(0,0,0,.8);
    border-color: var(--dropdown-border);
  }

  /* in-flow submenus on tap */
  .submenu{
    position: static;
    border-radius: 12px;
    border: 1px solid var(--dropdown-border);
    margin: 6px 0 4px;
    visibility: visible; opacity: 1; transform: none;
    padding: 6px;
    display: none;
  }
  .has-sub.open > .submenu{ display: block; }

  /* caret rotation when open */
  .has-sub.open > .sub-toggle .caret{ transform: rotate(180deg); }

  /* smaller logo */
  .menu-left .brand img{ height: calc(var(--logo-size) - 16px); }
}

/* A11y focus */
.menu a:focus-visible,
.sub-toggle:focus-visible,
.nav-toggle:focus-visible{
  outline: 2px solid #fff; outline-offset: 2px; border-radius: var(--radius-m);
}

/* ============================ */
/* ===== NAVIGATION END ======= */
/* ============================ */