:root {
    --brand-color: #eb1838;
    --brand-hover: #c80d2a;
}

/* Topbar Phía Trên Cùng */
.top-bar {
    background-color: #f8f9fa;
    border-bottom: 1px solid #e2e8f0;
    font-size: 0.8rem;
    color: #475569;
    padding: 4px 0;
}

.main-header {
    background-color: #ffffff;
    padding: 12px 0;
    border-bottom: 1px solid #f1f1f1;
}

/* Form Tìm kiếm PC */
.search-box .form-control {
    border: 2px solid var(--brand-color);
    border-right: none;
    border-radius: 6px 0 0 6px;
    padding: 8px 12px;
    font-size: 0.9rem;
}
.search-box .btn-search {
    background-color: var(--brand-color);
    color: #fff;
    border: 2px solid var(--brand-color);
    border-radius: 0 6px 6px 0;
    padding: 0 16px;
    font-weight: 600;
}

/* Nút Khối Hotline / Cứu hộ */
.header-hotline {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: #1e293b;
    padding: 4px 8px;
    border-radius: 6px;
    transition: all 0.2s;
}
.header-hotline:hover {
    background-color: #fff5f6;
    color: var(--brand-color);
}

/* Nút Action Header */
.header-btn {
    border: 1px solid #e2e8f0;
    color: #333;
    padding: 6px 10px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 5px;
    background: #fff;
    white-space: nowrap;
}
.header-btn:hover {
    border-color: var(--brand-color);
    color: var(--brand-color);
    background-color: #fff5f6;
}

/* Nút Đặt Lịch Hẹn nổi bật */
.btn-booking {
    border-color: #ffc107 !important;
    background-color: #fffdf5 !important;
    color: #b02a37 !important;
}
.btn-booking:hover {
    background-color: var(--brand-color) !important;
    color: #ffffff !important;
    border-color: var(--brand-color) !important;
}
.btn-booking:hover i {
    color: #ffffff !important;
}

/* Navigation Bar Desktop */
.nav-navbar {
    background-color: var(--brand-color);
    box-shadow: 0 4px 10px rgba(235, 24, 56, 0.15);
}
.nav-navbar .nav-link {
    color: #ffffff !important;
    font-weight: 600;
    font-size: 0.92rem;
    padding: 10px 16px !important;
    text-transform: uppercase;
}
.nav-navbar .nav-link:hover {
    background-color: rgba(0, 0, 0, 0.12);
}

/* RESPONSIVE MOBILE & IPAD (< 992px) */
@media (max-width: 991px) {
    .main-header {
        padding: 8px 0;
    }
    .mobile-header-row {
        display: flex;
        align-items: center;
        justify-content: space-between;
    }
    .mobile-logo img {
        max-height: 38px !important;
    }
    .mobile-action-icon {
        font-size: 1.4rem;
        color: #333;
        padding: 4px 8px;
        position: relative;
        text-decoration: none;
    }
    .mobile-search-wrapper {
        margin-top: 8px;
    }
    .mobile-search-wrapper .form-control {
        font-size: 0.85rem;
        padding: 6px 12px;
    }
    .mobile-search-wrapper .btn-search {
        padding: 0 12px;
    }
    .mobile-nav-drawer {
        width: 280px;
    }
}

.dropdown-menu {
    border: none;
    box-shadow: 0 8px 20px rgba(0,0,0,0.12);
    border-radius: 8px;
}

@media (min-width: 992px) {
    .custom-nav-dropdown:hover .dropdown-menu {
        display: block;
        margin-top: 0;
        animation: fadeIn 0.2s ease-in-out;
    }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}

.dropdown-menu .dropdown-item:hover {
    background-color: #fff5f6;
    color: var(--brand-color);
}