/* === HEADER + TOP STRIP + MOBILE MENU === */
.top-strip { background: linear-gradient(90deg, var(--secondary), var(--primary)); color: white; padding: 8px 0; font-size: 0.75rem; text-align: center; }
.top-strip .container { display: flex; align-items: center; justify-content: center; gap: 8px; flex-wrap: wrap; }
.strip-text { font-weight: 500; }
.strip-link { color: #FDE68A; text-decoration: none; font-weight: 600; }

.header { position: relative; top: 0; z-index: 1000; background: #FFFFFF; border-bottom: none; padding: 10px 0; }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.logo img { height: 38px; }
.nav-desktop { display: none; }
.header-buttons { display: none; }

.hamburger { display: flex; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 8px; }

/* Language Toggle */
.lang-toggle, .lang-toggle-mobile {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 6px 10px;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    font-family: 'Inter', sans-serif;
}
.lang-toggle:hover, .lang-toggle-mobile:hover { border-color: var(--primary); }
.lang-active { color: var(--primary); font-weight: 700; }
.lang-inactive { color: var(--text-muted); }
.lang-divider { color: var(--border); margin: 0 2px; }
.lang-toggle { display: none; }
.lang-toggle-mobile { display: block; }

/* Mobile Home Button */
.mobile-home-btn { display: block; font-size: 1.2rem; text-decoration: none; padding: 4px; }

.hamburger span { width: 22px; height: 2.5px; background: var(--text); border-radius: 2px; transition: all 0.3s; }
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

.mobile-menu { position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: white; z-index: 999; overflow-y: auto; transform: translateX(100%); transition: transform 0.3s ease; padding-top: 90px; }
.mobile-menu.active { transform: translateX(0); }
.mobile-menu-inner { padding: 16px; }
.mobile-buttons { display: flex; gap: 8px; margin-bottom: 20px; }
.mobile-buttons .btn { flex: 1; text-align: center; padding: 12px; }
.mobile-nav-item { border-bottom: 1px solid var(--border); }
.mobile-nav-link { display: flex; justify-content: space-between; align-items: center; width: 100%; padding: 14px 0; background: none; border: none; font-size: 0.95rem; font-weight: 600; color: var(--text); cursor: pointer; }
.mobile-nav-link .arrow { transition: transform 0.2s; font-size: 0.8rem; color: var(--text-muted); }
.mobile-nav-link.active .arrow { transform: rotate(180deg); }
.mobile-sub { display: none; padding: 0 0 12px 12px; }
.mobile-sub.active { display: block; }
.mobile-sub a { display: block; padding: 8px 0; color: var(--text-muted); text-decoration: none; font-size: 0.85rem; font-weight: 500; }
.mobile-sub a:hover { color: var(--primary); }
.mobile-sub hr { border: none; border-top: 1px solid var(--border); margin: 8px 0; }

/* Mobile nested exam accordion */
.mob-exam-item { border-bottom: 1px solid var(--border); }
.mob-exam-toggle { display: flex; justify-content: space-between; align-items: center; width: 100%; padding: 10px 0; background: none; border: none; font-size: 0.85rem; font-weight: 600; color: var(--text); cursor: pointer; font-family: 'Inter', sans-serif; }
.mob-exam-toggle span { font-size: 0.8rem; color: var(--text-muted); transition: transform 0.2s; }
.mob-exam-item.open .mob-exam-toggle span { transform: rotate(90deg); }
.mob-exam-sub { display: none; padding: 0 0 10px 14px; }
.mob-exam-item.open .mob-exam-sub { display: block; }
.mob-exam-sub a { display: block; padding: 6px 0; color: var(--text-muted); text-decoration: none; font-size: 0.8rem; }
.mob-exam-sub a:hover { color: var(--primary); }

@media (min-width: 1024px) {
    .hamburger { display: none; }
    .nav-desktop { display: flex; align-items: center; gap: 4px; }
    .header-buttons { display: flex; align-items: center; gap: 8px; }
    .logo img { height: 44px; }
    .lang-toggle { display: block; }
    .lang-toggle-mobile { display: none; }
    .mobile-home-btn { display: none; }
    .nav-item { position: relative; }
    .nav-link { display: flex; align-items: center; gap: 4px; padding: 8px 12px; font-size: 0.82rem; font-weight: 600; color: var(--text); text-decoration: none; border-radius: 6px; transition: all 0.2s; }
    .nav-link:hover { background: #EFF6FF; color: var(--primary); }
    .nav-link .arrow { font-size: 0.7rem; color: var(--text-muted); }
    .dropdown-menu { display: none; position: absolute; top: 100%; left: 0; background: white; border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow-lg); padding: 8px; min-width: 200px; z-index: 1001; }
    .nav-item:hover .dropdown-menu { display: block; }
    .dropdown-menu a { display: block; padding: 8px 12px; color: var(--text); text-decoration: none; font-size: 0.82rem; font-weight: 500; border-radius: 6px; }
    .dropdown-menu a:hover { background: #EFF6FF; color: var(--primary); }
    
    /* Nested exam sub-menu */
    .exam-dropdown { min-width: 220px; padding: 0 !important; }
    .exam-menu-item { position: relative; }
    .exam-link { display: flex !important; justify-content: space-between; align-items: center; padding: 10px 14px !important; border-radius: 0 !important; border-bottom: 1px solid var(--border); }
    .exam-menu-item:last-child .exam-link { border-bottom: none; }
    .exam-link:hover { background: #EFF6FF; }
    .sub-arrow { font-size: 0.8rem; color: var(--text-muted); }
    .exam-sub-menu { display: none; position: absolute; left: 100%; top: 0; background: white; border: 1px solid var(--border); border-radius: 0 var(--radius) var(--radius) 0; box-shadow: var(--shadow-lg); padding: 8px; min-width: 180px; z-index: 1002; }
    .exam-menu-item:hover .exam-sub-menu { display: block; }
    .exam-sub-menu a { display: block; padding: 8px 12px; color: var(--text); text-decoration: none; font-size: 0.8rem; font-weight: 500; border-radius: 4px; }
    .exam-sub-menu a:hover { background: #EFF6FF; color: var(--primary); }

    .mega-dropdown { min-width: 420px; padding: 16px; }
    .dropdown-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
    .dropdown-col h4 { font-size: 0.75rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 8px; }
}