/**
 * VBM Header CSS
 *
 * Professional header styles for Vietnam Best Marathon
 *
 * Author: VBM Development Team
 * Version: 1.0.0
 *
 * Table of Contents:
 * 1. CSS Variables
 * 2. Reset & Container
 * 3. Top Announcement Bar
 * 4. Desktop Header
 * 5. Desktop Navigation
 * 6. Dropdown Menu
 * 7. Mega Menu
 * 8. Desktop Login/User
 * 9. Mobile Header
 * 10. Mobile Navigation Drawer
 * 11. Mobile Menu
 * 12. Responsive
 */

/* ===== 1. CSS Variables ===== */
:root {
    /* Colors */
    --vbm-header-primary: #FFD700;
    --vbm-header-primary-dark: #FFA500;
    --vbm-header-text-primary: #333333;
    --vbm-header-text-secondary: #666666;
    --vbm-header-white: #FFFFFF;
    --vbm-header-border: #E0E0E0;
    --vbm-header-bg-light: #F5F5F5;
    --vbm-header-gradient: linear-gradient(135deg, #FFD700, #FFA500);

    /* Typography */
    --vbm-header-font: 'Be Vietnam Pro', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Layout */
    --vbm-header-transition: 0.3s ease;
    --vbm-header-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    --vbm-header-height: 65px;
    --vbm-header-mobile-height: 60px;
    --vbm-header-z-index: 9999;
}

/* ===== 2. Reset & Container ===== */
.vbm-header-container * {
    box-sizing: border-box;
}

.vbm-header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== 3. Top Announcement Bar ===== */
.vbm-header-top-bar {
    background: var(--vbm-header-white);
    border-bottom: 1px solid var(--vbm-header-primary);
    padding: 8px 0;
}

.vbm-header-announcement {
    text-align: center;
    color: var(--vbm-header-text-primary);
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.3px;
    font-family: var(--vbm-header-font);
}

/* ===== 4. Desktop Header ===== */
.vbm-header-desktop {
    display: none;
}

@media (min-width: 1025px) {
    .vbm-header-desktop {
        display: block;
        background: var(--vbm-header-white);
        border-bottom: 1px solid var(--vbm-header-border);
        position: relative;
        z-index: var(--vbm-header-z-index);
        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    }

    .vbm-header-desktop-content {
        display: grid;
        grid-template-columns: 1fr auto 1fr;
        align-items: center;
        height: var(--vbm-header-height);
    }
}

/* ===== 5. Desktop Logo ===== */
.vbm-header-desktop-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    justify-self: start;
}

.vbm-header-logo-box {
    width: 180px;
    height: 55px;
    background: var(--vbm-header-gradient);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.vbm-header-logo-box::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255,255,255,0.1), transparent);
    animation: vbm-header-shine 3s infinite;
}

@keyframes vbm-header-shine {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.vbm-header-logo-box img {
    max-height: 45px;
    width: auto;
    position: relative;
    z-index: 1;
}

/* ===== 6. Desktop Navigation ===== */
.vbm-header-desktop-nav {
    display: flex;
    align-items: center;
    gap: 24px;
    justify-self: center;
}

.vbm-header-nav-list {
    display: flex;
    align-items: center;
    gap: 20px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.vbm-header-nav-item {
    position: relative;
}

.vbm-header-nav-link {
    color: var(--vbm-header-text-primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    padding: 8px 0;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: color var(--vbm-header-transition);
    cursor: pointer;
    background: none;
    border: none;
    font-family: var(--vbm-header-font);
}

.vbm-header-nav-link:hover,
.vbm-header-nav-link:focus {
    color: var(--vbm-header-primary);
    outline: none;
}

.vbm-header-nav-item.vbm-header-active > .vbm-header-nav-link {
    color: var(--vbm-header-primary);
}

.vbm-header-icon-arrow {
    transition: transform var(--vbm-header-transition);
}

.vbm-header-nav-item.vbm-header-active .vbm-header-icon-arrow {
    transform: rotate(180deg);
}

/* ===== 7. Dropdown Menu ===== */
.vbm-header-dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--vbm-header-white);
    border: 1px solid var(--vbm-header-border);
    border-radius: 8px;
    box-shadow: var(--vbm-header-shadow);
    padding: 12px 0;
    min-width: 220px;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: all var(--vbm-header-transition);
    z-index: 999;
    margin-top: -5px;
    list-style: none;
}

.vbm-header-nav-item.vbm-header-active .vbm-header-dropdown-menu {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    margin-top: 10px;
}

.vbm-header-dropdown-menu li {
    margin: 0;
}

.vbm-header-dropdown-menu a {
    display: block;
    padding: 10px 20px;
    color: var(--vbm-header-text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: all var(--vbm-header-transition);
    font-family: var(--vbm-header-font);
}

.vbm-header-dropdown-menu a:hover {
    background: var(--vbm-header-bg-light);
    color: var(--vbm-header-text-primary);
    padding-left: 24px;
}

/* ===== 8. Mega Menu ===== */
.vbm-header-mega-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--vbm-header-white);
    border: 1px solid var(--vbm-header-border);
    border-radius: 8px;
    box-shadow: var(--vbm-header-shadow);
    padding: 30px;
    width: 750px;
    max-width: 90vw;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: all var(--vbm-header-transition);
    z-index: 999;
    margin-top: -5px;
}

.vbm-header-nav-item.vbm-header-active .vbm-header-mega-menu {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    margin-top: 10px;
}

.vbm-header-mega-columns {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.vbm-header-mega-title {
    color: var(--vbm-header-text-primary);
    font-size: 13px;
    font-weight: 700;
    margin: 0 0 15px 0;
    padding: 0 0 8px 0;
    border-bottom: 2px solid var(--vbm-header-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-family: var(--vbm-header-font);
}

.vbm-header-mega-links {
    list-style: none;
    margin: 0;
    padding: 0;
}

.vbm-header-mega-links > li {
    margin-bottom: 8px;
}

.vbm-header-mega-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    color: var(--vbm-header-text-secondary);
    text-decoration: none;
    font-size: 13px;
    border-radius: 6px;
    transition: all var(--vbm-header-transition);
    background: none;
    border: none;
    width: 100%;
    text-align: left;
    cursor: pointer;
    font-family: var(--vbm-header-font);
}

.vbm-header-mega-link:hover {
    background: var(--vbm-header-bg-light);
    color: var(--vbm-header-text-primary);
    padding-left: 16px;
}

.vbm-header-mega-link-text {
    display: flex;
    align-items: center;
    gap: 6px;
}

.vbm-header-mega-link.vbm-header-submenu-toggle::after {
    content: '+';
    font-size: 12px;
    color: var(--vbm-header-text-secondary);
    margin-left: auto;
    transition: transform var(--vbm-header-transition);
    font-weight: 300;
}

.vbm-header-has-submenu.vbm-header-active .vbm-header-mega-link.vbm-header-submenu-toggle::after {
    transform: rotate(45deg);
}

/* Badges */
.vbm-header-badge {
    font-size: 9px;
    padding: 3px 6px;
    border-radius: 10px;
    font-weight: 700;
    text-transform: uppercase;
    margin-left: 6px;
    vertical-align: super;
    line-height: 1;
}

.vbm-header-badge-hot {
    background: linear-gradient(135deg, #FF4444, #FF6B6B);
    color: white;
    animation: vbm-header-pulse 2s infinite;
}

.vbm-header-badge-new {
    background: var(--vbm-header-gradient);
    color: white;
}

@keyframes vbm-header-pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

/* Mega Submenu (Level 3) */
.vbm-header-mega-submenu {
    list-style: none;
    margin: 8px 0 0 0;
    padding: 8px 0 0 16px;
    border-left: 2px solid var(--vbm-header-border);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--vbm-header-transition);
}

.vbm-header-has-submenu.vbm-header-active .vbm-header-mega-submenu {
    max-height: 500px;
}

.vbm-header-mega-submenu li {
    margin-bottom: 6px;
}

.vbm-header-mega-submenu a {
    display: block;
    padding: 6px 12px;
    color: var(--vbm-header-text-secondary);
    text-decoration: none;
    font-size: 12px;
    border-radius: 4px;
    transition: all var(--vbm-header-transition);
    font-family: var(--vbm-header-font);
}

.vbm-header-mega-submenu a:hover {
    background: var(--vbm-header-bg-light);
    color: var(--vbm-header-text-primary);
    padding-left: 16px;
}

/* ===== 9. Desktop Login/User ===== */
.vbm-header-btn-login {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    padding: 0;
    background: var(--vbm-header-gradient);
    color: white;
    text-decoration: none;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    transition: all var(--vbm-header-transition);
    font-family: var(--vbm-header-font);
    justify-self: end;
}

.vbm-header-btn-login:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(255, 165, 0, 0.4);
}

.vbm-header-btn-login-icon {
    display: flex;
    opacity: 0.9;
    transition: opacity var(--vbm-header-transition);
}

.vbm-header-btn-login:hover .vbm-header-btn-login-icon {
    opacity: 1;
}

/* User Profile */
.vbm-header-user-profile {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 4px 4px 4px 12px;
    background: white;
    border: 1.5px solid var(--vbm-header-border);
    border-radius: 50px;
    cursor: pointer;
    transition: all var(--vbm-header-transition);
    position: relative;
    justify-self: end;
}

.vbm-header-user-profile:hover {
    border-color: var(--vbm-header-primary);
    background: var(--vbm-header-bg-light);
}

.vbm-header-user-name {
    font-size: 13px;
    font-weight: 500;
    color: var(--vbm-header-text-primary);
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-family: var(--vbm-header-font);
}

.vbm-header-user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--vbm-header-bg-light);
    background: var(--vbm-header-bg-light);
}

/* User Dropdown */
.vbm-header-user-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: white;
    border: 1px solid var(--vbm-header-border);
    border-radius: 8px;
    box-shadow: var(--vbm-header-shadow);
    padding: 8px 0;
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: all var(--vbm-header-transition);
    z-index: 999;
}

.vbm-header-user-profile.vbm-header-active .vbm-header-user-dropdown {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.vbm-header-user-dropdown-header {
    padding: 12px 16px;
    border-bottom: 1px solid var(--vbm-header-border);
}

.vbm-header-user-dropdown-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--vbm-header-text-primary);
    margin-bottom: 4px;
    font-family: var(--vbm-header-font);
}

.vbm-header-user-dropdown-email {
    font-size: 12px;
    color: var(--vbm-header-text-secondary);
    font-family: var(--vbm-header-font);
}

.vbm-header-user-dropdown-menu {
    list-style: none;
    padding: 8px 0;
    margin: 0;
}

.vbm-header-user-dropdown-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    color: var(--vbm-header-text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: all var(--vbm-header-transition);
    font-family: var(--vbm-header-font);
    background: none;
    border: none;
    width: 100%;
    text-align: left;
    cursor: pointer;
}

.vbm-header-user-dropdown-link:hover {
    background: var(--vbm-header-bg-light);
    color: var(--vbm-header-text-primary);
}

.vbm-header-user-dropdown-link.vbm-header-logout {
    color: #e74c3c;
    border-top: 1px solid var(--vbm-header-border);
    margin-top: 4px;
}

.vbm-header-user-dropdown-link.vbm-header-logout:hover {
    background: #fef5f5;
}

.vbm-header-user-dropdown-icon {
    width: 18px;
    height: 18px;
    opacity: 0.6;
}

/* ===== 10. Mobile Header ===== */
.vbm-header-mobile {
    display: block;
    background: var(--vbm-header-white);
    position: relative;
    z-index: var(--vbm-header-z-index);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

@media (min-width: 1025px) {
    .vbm-header-mobile {
        display: none;
    }
}

.vbm-header-mobile-content {
    display: grid;
    grid-template-columns: 50px 1fr 50px;
    align-items: center;
    height: var(--vbm-header-mobile-height);
    padding: 0 16px;
    gap: 12px;
}

/* Mobile Menu Toggle */
.vbm-header-mobile-toggle {
    background: none;
    border: none;
    padding: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.vbm-header-hamburger {
    width: 24px;
    height: 18px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.vbm-header-hamburger-line {
    width: 100%;
    height: 2.5px;
    background: var(--vbm-header-text-primary);
    border-radius: 2px;
    transition: all var(--vbm-header-transition);
}

.vbm-header-mobile-toggle.vbm-header-active .vbm-header-hamburger-line:nth-child(1) {
    transform: translateY(7.75px) rotate(45deg);
}

.vbm-header-mobile-toggle.vbm-header-active .vbm-header-hamburger-line:nth-child(2) {
    opacity: 0;
}

.vbm-header-mobile-toggle.vbm-header-active .vbm-header-hamburger-line:nth-child(3) {
    transform: translateY(-7.75px) rotate(-45deg);
}

/* Mobile Logo */
.vbm-header-mobile-logo {
    display: flex;
    justify-content: center;
    align-items: center;
}

.vbm-header-mobile-logo-box {
    height: 50px;
    padding: 0 20px;
    background: var(--vbm-header-gradient);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.vbm-header-mobile-logo-box::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255,255,255,0.15), transparent);
    animation: vbm-header-shine 3s infinite;
}

.vbm-header-mobile-logo-box img {
    max-height: 45px;
    width: auto;
    position: relative;
    z-index: 1;
}

/* Mobile User Action */
.vbm-header-mobile-user-action {
    display: flex;
    justify-content: flex-end;
    align-items: center;
}

.vbm-header-mobile-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--vbm-header-border);
    background: var(--vbm-header-bg-light);
    cursor: pointer;
    transition: all var(--vbm-header-transition);
}

.vbm-header-mobile-avatar:hover {
    border-color: var(--vbm-header-primary);
    transform: scale(1.05);
}

.vbm-header-mobile-login-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--vbm-header-gradient);
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--vbm-header-transition);
    box-shadow: 0 2px 8px rgba(255, 165, 0, 0.3);
    text-decoration: none;
}

.vbm-header-mobile-login-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(255, 165, 0, 0.4);
}

.vbm-header-mobile-login-icon {
    width: 18px;
    height: 18px;
    opacity: 0.9;
}

/* ===== 11. Mobile Navigation Drawer ===== */
.vbm-header-mobile-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    max-width: 1200px;
    height: 100vh;
    background: white;
    transform: translateX(-100%);
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 99999;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.vbm-header-mobile-nav.vbm-header-active {
    transform: translateX(0);
}

/* Mobile Nav Header */
.vbm-header-mobile-nav-header {
    padding: 18px 20px;
    background: white;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-shrink: 0;
    border-bottom: 1px solid #f0f0f0;
    position: relative;
}

.vbm-header-mobile-nav-brand {
    display: flex;
    align-items: center;
    justify-content: center;
}

.vbm-header-mobile-nav-logo-wrapper {
    height: 50px;
    padding: 0 20px;
    background: var(--vbm-header-gradient);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.vbm-header-mobile-nav-logo-wrapper::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255,255,255,0.15), transparent);
    animation: vbm-header-shine 3s infinite;
}

.vbm-header-mobile-nav-logo {
    max-height: 45px;
    width: auto;
    position: relative;
    z-index: 1;
}

.vbm-header-mobile-nav-brand-text {
    font-size: 16px;
    font-weight: 700;
    color: var(--vbm-header-text-primary);
    font-family: var(--vbm-header-font);
}

.vbm-header-mobile-nav-close {
    width: 36px;
    height: 36px;
    border: none;
    background: transparent;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s ease;
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
}

.vbm-header-mobile-nav-close:active {
    background: var(--vbm-header-bg-light);
}

.vbm-header-mobile-nav-close svg {
    stroke: var(--vbm-header-text-primary);
}

/* Mobile User Section */
.vbm-header-mobile-user-section {
    margin: 20px;
    margin-bottom: 16px;
    padding: 18px;
    background: var(--vbm-header-bg-light);
    border-radius: 12px;
    border: 1px solid #e8e8e8;
    display: none;
}

.vbm-header-mobile-user-section.vbm-header-show {
    display: block;
}

.vbm-header-mobile-user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 14px;
}

.vbm-header-mobile-user-avatar-large {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    object-fit: cover;
    border: 1.5px solid #e0e0e0;
}

.vbm-header-mobile-user-details {
    flex: 1;
    min-width: 0;
}

.vbm-header-mobile-user-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--vbm-header-text-primary);
    margin-bottom: 3px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-family: var(--vbm-header-font);
}

.vbm-header-mobile-user-email {
    font-size: 12px;
    color: var(--vbm-header-text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-family: var(--vbm-header-font);
}

.vbm-header-mobile-user-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.vbm-header-mobile-user-btn {
    padding: 10px 14px;
    border: 1px solid #e0e0e0;
    background: white;
    border-radius: 8px;
    font-size: 12px;
    font-weight: 600;
    color: var(--vbm-header-text-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    transition: all 0.2s ease;
    font-family: var(--vbm-header-font);
    cursor: pointer;
}

.vbm-header-mobile-user-btn:active {
    transform: scale(0.98);
    background: var(--vbm-header-bg-light);
}

.vbm-header-mobile-user-btn.vbm-header-dashboard {
    background: var(--vbm-header-text-primary);
    color: white;
    border-color: var(--vbm-header-text-primary);
}

.vbm-header-mobile-user-btn.vbm-header-dashboard svg {
    stroke: white;
}

.vbm-header-mobile-user-btn.vbm-header-logout {
    color: #dc2626;
    border-color: #fecaca;
    background: #fef2f2;
}

/* ===== 12. Mobile Menu ===== */
.vbm-header-mobile-menu {
    flex: 1;
    overflow-y: auto;
    padding: 0 20px 20px;
}

.vbm-header-mobile-nav-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.vbm-header-mobile-nav-item {
    margin-bottom: 2px;
}

.vbm-header-mobile-nav-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 0;
    color: var(--vbm-header-text-primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 15px;
    transition: all 0.2s ease;
    background: none;
    border: none;
    width: 100%;
    text-align: left;
    cursor: pointer;
    font-family: var(--vbm-header-font);
    border-bottom: 1px solid #f5f5f5;
}

.vbm-header-mobile-nav-link:active {
    color: var(--vbm-header-primary);
}

.vbm-header-mobile-icon {
    font-size: 20px;
    color: #999;
    transition: transform 0.2s ease;
    font-weight: 300;
    line-height: 1;
}

.vbm-header-mobile-nav-item.vbm-header-has-submenu.vbm-header-active .vbm-header-mobile-icon {
    transform: rotate(45deg);
}

/* Mobile Submenu Level 2 */
.vbm-header-mobile-submenu {
    list-style: none;
    background: #f9f9f9;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    margin: 0;
    padding: 0;
}

.vbm-header-mobile-submenu.vbm-header-active {
    max-height: 2000px;
    padding: 12px 0 16px;
}

.vbm-header-mobile-submenu-title {
    padding: 14px 20px 8px;
    font-size: 11px;
    font-weight: 700;
    color: #666;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    display: inline-block;
    border-bottom: 1px solid rgba(255, 215, 0, 0.5);
    padding-bottom: 6px;
    margin-bottom: 8px;
    font-family: var(--vbm-header-font);
}

.vbm-header-mobile-submenu > li {
    position: relative;
}

.vbm-header-mobile-submenu > li > a,
.vbm-header-mobile-submenu > li > button {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 20px;
    color: var(--vbm-header-text-primary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s ease;
    background: transparent;
    border: none;
    width: 100%;
    text-align: left;
    cursor: pointer;
    font-family: var(--vbm-header-font);
    position: relative;
}

.vbm-header-mobile-submenu > li > a::before,
.vbm-header-mobile-submenu > li > button::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 4px;
    background: #ccc;
    border-radius: 50%;
    transition: all 0.2s ease;
}

.vbm-header-mobile-submenu > li > a:active::before,
.vbm-header-mobile-submenu > li > button:active::before {
    width: 8px;
    height: 8px;
    background: #333;
}

.vbm-header-mobile-submenu > li > a:active,
.vbm-header-mobile-submenu > li > button:active {
    background: rgba(0, 0, 0, 0.03);
    padding-left: 24px;
}

.vbm-header-mobile-submenu > li > button {
    font-weight: 600;
}

.vbm-header-mobile-submenu > li > button::after {
    content: '+';
    font-size: 16px;
    color: #999;
    transition: transform 0.2s ease;
    font-weight: 300;
    line-height: 1;
}

.vbm-header-mobile-submenu > li.vbm-header-has-sub3.vbm-header-active > button::after {
    transform: rotate(45deg);
}

.vbm-header-mobile-submenu > li.vbm-header-has-sub3.vbm-header-active > button::before {
    width: 8px;
    height: 8px;
    background: #333;
}

/* Mobile Level 3 */
.vbm-header-mobile-sub3 {
    list-style: none;
    background: #f0f0f0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    padding: 0;
    margin: 0 12px 8px 28px;
    border-radius: 6px;
}

.vbm-header-mobile-sub3.vbm-header-active {
    max-height: 1000px;
    padding: 8px 0;
}

.vbm-header-mobile-sub3 > li > a {
    display: block;
    padding: 11px 16px;
    color: #666;
    text-decoration: none;
    font-size: 13px;
    font-weight: 400;
    transition: all 0.2s ease;
    position: relative;
    padding-left: 28px;
    font-family: var(--vbm-header-font);
}

.vbm-header-mobile-sub3 > li > a::before {
    content: '−';
    position: absolute;
    left: 12px;
    color: #999;
    font-size: 12px;
}

.vbm-header-mobile-sub3 > li > a:active {
    color: var(--vbm-header-text-primary);
    background: rgba(255, 255, 255, 0.5);
}

.vbm-header-mobile-sub3 > li > a:active::before {
    color: #333;
}

/* Mobile Overlay */
.vbm-header-mobile-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(0, 0, 0, 0.4);
    opacity: 0;
    visibility: hidden;
    transition: all var(--vbm-header-transition);
    z-index: 9998;
}

.vbm-header-mobile-overlay.vbm-header-active {
    opacity: 1;
    visibility: visible;
}

/* ===== 13. Responsive ===== */
@media (min-width: 1151px) {
    .vbm-header-nav-list {
        gap: 22px;
    }

    .vbm-header-desktop-nav {
        gap: 24px;
    }
}

@media (min-width: 1250px) {
    .vbm-header-nav-list {
        gap: 24px;
    }

    .vbm-header-desktop-nav {
        gap: 28px;
    }
}

@media (max-width: 640px) {
    .vbm-header-container {
        padding: 0 15px;
    }

    .vbm-header-mobile-content {
        padding: 0 12px;
    }

    .vbm-header-mega-columns {
        grid-template-columns: 1fr;
    }
}