/* ============================================================
   Aurinto — header / navigation
   ============================================================ */

#header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, .82);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent;
    transition: border-color .2s ease, box-shadow .2s ease;
}

#header.scrolled {
    border-bottom-color: var(--line);
    box-shadow: 0 4px 20px -12px rgba(10, 37, 64, .18);
}

.header-inner {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
    height: 72px;
    display: flex;
    align-items: center;
    gap: 28px;
}

/* Logo */
.logo a {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--ink);
}

.logo-mark { flex: none; border-radius: 8px; }

.logo-txt {
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: -.03em;
    color: var(--ink);
}

/* Desktop nav */
.desktop-nav { margin-left: 8px; }

.desktop-nav ul {
    display: flex;
    align-items: center;
    gap: 4px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-link,
.dropdown-toggle {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 9px 14px;
    border-radius: 8px;
    color: var(--text);
    font-weight: 500;
    font-size: .95rem;
    transition: color .15s ease, background .15s ease;
}

.nav-link:hover,
.dropdown-toggle:hover { color: var(--ink); background: var(--bg-soft); }

.arrow-down {
    width: 8px;
    height: 8px;
    border-right: 1.6px solid currentColor;
    border-bottom: 1.6px solid currentColor;
    transform: rotate(45deg) translateY(-2px);
    transition: transform .18s ease;
}

.dropdown { position: relative; }

.dropdown-menu {
    position: absolute;
    top: calc(100% + 10px);
    left: -12px;
    min-width: 340px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius-l);
    box-shadow: var(--shadow-l);
    padding: 10px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(6px);
    transition: opacity .18s ease, transform .18s ease, visibility .18s;
}

.dropdown.open .dropdown-menu,
.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: none;
}

.dropdown.open .arrow-down,
.dropdown:hover .arrow-down { transform: rotate(225deg) translateY(-2px); }

.mega-list { display: flex; flex-direction: column; }

.mega-list a {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 12px 14px;
    border-radius: 12px;
    transition: background .15s ease;
}

.mega-list a:hover { background: var(--bg-soft); }

.mega-ico {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: var(--primary-soft);
    color: var(--primary);
    flex: none;
    margin-top: 2px;
}

.mega-ico svg { width: 19px; height: 19px; }

.mega-txt { display: flex; flex-direction: column; gap: 1px; }

.mega-txt strong { color: var(--ink); font-weight: 600; font-size: .93rem; }

.mega-txt small { color: var(--muted); font-size: .8rem; line-height: 1.4; }

/* Right cluster */
.header-actions {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 10px;
}

.header-signin { color: var(--text); }

.btn-nav { padding: 10px 18px; font-size: .9rem; }

/* Burger */
.burger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 42px;
    height: 42px;
    border-radius: 10px;
    border: 1px solid var(--line);
    background: #fff;
    padding: 0 10px;
}

.burger span {
    display: block;
    height: 2px;
    border-radius: 2px;
    background: var(--ink);
    transition: transform .2s ease, opacity .2s ease;
}

.burger[aria-expanded="true"] span:first-child { transform: translateY(3.5px) rotate(45deg); }
.burger[aria-expanded="true"] span:last-child { transform: translateY(-3.5px) rotate(-45deg); }

/* Mobile nav */
.mobile-nav {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    bottom: 0;
    background: #fff;
    border-top: 1px solid var(--line);
    padding: 24px;
    overflow-y: auto;
    z-index: 99;
}

.mobile-nav:not([hidden]) { display: block; }

.mnav-group { margin-bottom: 22px; }

.mnav-title {
    font-size: .75rem;
    font-weight: 700;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 6px;
}

.mnav-group a {
    display: block;
    padding: 10px 0;
    color: var(--ink);
    font-weight: 500;
    font-size: 1.05rem;
    border-bottom: 1px solid var(--bg-soft);
}

.mobile-nav > .btn { width: 100%; margin-top: 6px; }

/* Breakpoints */
@media (max-width: 1024px) {
    .desktop-nav, .header-signin { display: none; }
    .burger { display: flex; }
    .header-inner { height: 64px; gap: 16px; }
    .mobile-nav { top: 64px; }
}

@media (max-width: 480px) {
    .btn-nav { padding: 9px 14px; font-size: .85rem; }
    .ask-ai-btn span { display: none; }
}

body.nav-open { overflow: hidden; }