/* ============================================
   Global Styles & Reset
   ============================================ */
   
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --secondary-color: #7c3aed;
    --accent-color: #f59e0b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --dark-color: #1e293b;
    --light-color: #f8fafc;
    --gray-color: #64748b;
    --white: #ffffff;
    --gradient-primary: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
    --gradient-secondary: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.2);
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    background: var(--white);
    overflow-x: hidden;
}

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

/* ============================================
   Typography
   ============================================ */

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--dark-color);
}

h1 {
    font-size: 3rem;
}

h2 {
    font-size: 2.5rem;
}

h3 {
    font-size: 1.75rem;
}

h4 {
    font-size: 1.25rem;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

/* ============================================
   Buttons
   ============================================ */

.btn {
    display: inline-block;
    padding: 12px 30px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--white);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: var(--white);
}

.btn-lg {
    padding: 16px 40px;
    font-size: 1.1rem;
}

.btn-block {
    display: block;
    width: 100%;
}

/* ============================================
   Header & Navigation
   ============================================ */

.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: var(--white);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.navbar {
    padding: 20px 0;
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo a {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
}

.logo i {
    font-size: 2rem;
    margin-right: 10px;
}

.logo-vn {
    color: var(--accent-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
    align-items: center;
}

.nav-menu a {
    color: var(--dark-color);
    font-weight: 500;
    padding: 8px 0;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

.nav-menu a:hover::after {
    width: 100%;
}

.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--white);
    min-width: 220px;
    box-shadow: var(--shadow-lg);
    border-radius: 8px;
    padding: 10px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
    list-style: none;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li {
    padding: 0;
}

.dropdown-menu a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 18px;
    color: var(--dark-color);
    font-size: 0.9rem;
    transition: background 0.15s, color 0.15s, padding-left 0.15s;
}

.dropdown-menu a i {
    width: 28px;
    height: 28px;
    border-radius: 7px;
    background: var(--light-color, #f3f4f6);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.78rem;
    flex-shrink: 0;
    transition: background 0.15s, color 0.15s;
}

.dropdown-menu a:hover {
    background: var(--light-color);
    color: var(--primary-color);
    padding-left: 22px;
}

.dropdown-menu a:hover i {
    background: var(--primary-color, #2563eb);
    color: #fff;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--dark-color);
    border-radius: 3px;
    transition: var(--transition);
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 120px 0 60px;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('../images/hero-pattern.svg');
    opacity: 0.1;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.3);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: var(--white);
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 20px;
    animation: fadeInUp 1s ease;
}

.title-highlight {
    color: var(--accent-color);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 40px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    opacity: 0.95;
    animation: fadeInUp 1s ease 0.2s backwards;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 60px;
    animation: fadeInUp 1s ease 0.4s backwards;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    max-width: 800px;
    margin: 0 auto;
    animation: fadeInUp 1s ease 0.6s backwards;
}

.stat-item {
    text-align: center;
    padding: 20px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.stat-item h3 {
    font-size: 2.5rem;
    color: var(--white);
    margin-bottom: 5px;
}

.stat-item p {
    font-size: 0.9rem;
    opacity: 0.9;
}

/* ============================================
   Services Section
   ============================================ */

.services-overview {
    padding: 100px 0;
    background: var(--light-color);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 15px;
    color: var(--dark-color);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--gray-color);
    max-width: 600px;
    margin: 0 auto;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 16px;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 25px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--white);
}

.service-card h3 {
    font-size: 1.25rem;
    margin-bottom: 15px;
    color: var(--dark-color);
}

.service-card p {
    color: var(--gray-color);
    margin-bottom: 20px;
    line-height: 1.6;
}

.service-link {
    color: var(--primary-color);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.service-link:hover {
    color: var(--secondary-color);
}

/* ============================================
   Service Detail Sections
   ============================================ */

.service-detail {
    padding: 100px 0;
}

.service-detail.alt {
    background: var(--light-color);
}

.detail-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.detail-label {
    display: inline-block;
    background: var(--gradient-primary);
    color: var(--white);
    padding: 6px 20px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.detail-text h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.detail-text > p {
    font-size: 1.1rem;
    color: var(--gray-color);
    margin-bottom: 30px;
    line-height: 1.8;
}

.feature-list {
    margin-bottom: 30px;
}

.feature-list ul {
    list-style: none;
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 12px 0;
    font-size: 1.05rem;
}

.feature-list i {
    color: var(--success-color);
    font-size: 1.25rem;
}

.detail-image {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.detail-image img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

/* Training Tabs */
.training-tabs {
    display: grid;
    gap: 25px;
    margin-bottom: 30px;
}

.training-category {
    background: var(--white);
    padding: 25px;
    border-radius: 12px;
    border-left: 4px solid var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.training-category h4 {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.training-category ul {
    list-style: none;
    padding-left: 30px;
}

.training-category li {
    padding: 8px 0;
    color: var(--gray-color);
    position: relative;
}

.training-category li::before {
    content: '•';
    position: absolute;
    left: -20px;
    color: var(--primary-color);
    font-weight: bold;
}

/* Tech Projects Grid */
.tech-projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
    margin-bottom: 30px;
}

.tech-project {
    background: var(--light-color);
    padding: 25px;
    border-radius: 12px;
    transition: var(--transition);
}

.tech-project:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-md);
}

.tech-project i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 15px;
    display: block;
}

.tech-project h4 {
    margin-bottom: 10px;
}

.tech-project p {
    color: var(--gray-color);
    font-size: 0.95rem;
}

/* Process Steps */
.process-steps {
    display: grid;
    gap: 20px;
    margin-bottom: 30px;
}

.step {
    display: flex;
    gap: 20px;
    align-items: start;
}

.step-number {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    flex-shrink: 0;
}

.step-content h4 {
    margin-bottom: 8px;
}

.step-content p {
    color: var(--gray-color);
    font-size: 0.95rem;
}

/* E-commerce Services */
.ecommerce-services {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
    margin-bottom: 30px;
}

.ecommerce-item {
    display: flex;
    gap: 20px;
    align-items: start;
    padding: 20px;
    background: var(--light-color);
    border-radius: 12px;
    transition: var(--transition);
}

.ecommerce-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.ecommerce-item i {
    font-size: 2rem;
    color: var(--primary-color);
    flex-shrink: 0;
}

.ecommerce-item h4 {
    margin-bottom: 8px;
    font-size: 1.1rem;
}

.ecommerce-item p {
    color: var(--gray-color);
    font-size: 0.9rem;
}

/* ============================================
   Ecosystem Section
   ============================================ */

.ecosystem {
    padding: 100px 0;
    background: var(--white);
}

.ecosystem-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.ecosystem-item {
    background: var(--light-color);
    padding: 40px 30px;
    border-radius: 16px;
    text-align: center;
    transition: var(--transition);
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.ecosystem-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0;
    transition: var(--transition);
    z-index: 0;
}

.ecosystem-item:hover::before {
    opacity: 0.05;
}

.ecosystem-item:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-xl);
}

.ecosystem-item > * {
    position: relative;
    z-index: 1;
}

.ecosystem-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--white);
}

.ecosystem-item h3 {
    font-size: 1.35rem;
    margin-bottom: 15px;
}

.ecosystem-item p {
    color: var(--gray-color);
    margin-bottom: 20px;
    line-height: 1.6;
}

.ecosystem-link {
    color: var(--primary-color);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.coming-soon {
    opacity: 0.7;
}

.coming-soon-badge {
    display: inline-block;
    background: var(--accent-color);
    color: var(--white);
    padding: 6px 15px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

/* ============================================
   About Section
   ============================================ */

.about {
    padding: 100px 0;
    background: var(--light-color);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-features {
    display: grid;
    gap: 20px;
    margin-bottom: 30px;
}

.about-feature {
    display: flex;
    gap: 20px;
    align-items: start;
}

.about-feature i {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.about-feature h4 {
    margin-bottom: 5px;
}

.about-feature p {
    color: var(--gray-color);
    font-size: 0.95rem;
}

.about-image {
    position: relative;
}

.about-image img {
    width: 100%;
    border-radius: 16px;
    box-shadow: var(--shadow-xl);
}

.about-stats {
    position: absolute;
    bottom: 30px;
    right: 30px;
    display: flex;
    gap: 20px;
}

.about-stats .stat {
    background: var(--white);
    padding: 20px 30px;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    text-align: center;
}

.about-stats .stat h3 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.about-stats .stat p {
    font-size: 0.9rem;
    color: var(--gray-color);
}

/* ============================================
   Contact Section
   ============================================ */

.contact {
    padding: 100px 0;
    background: var(--white);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
    margin-top: 60px;
}

.contact-info {
    background: var(--gradient-primary);
    padding: 50px 40px;
    border-radius: 16px;
    color: var(--white);
}

.contact-info h3 {
    color: var(--white);
    font-size: 1.75rem;
    margin-bottom: 40px;
}

.contact-item {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
}

.contact-item i {
    font-size: 1.5rem;
    flex-shrink: 0;
    margin-top: 5px;
}

.contact-item h4 {
    color: var(--white);
    margin-bottom: 8px;
    font-size: 1.1rem;
}

.contact-item p {
    opacity: 0.9;
    line-height: 1.6;
}

.social-links {
    margin-top: 40px;
}

.social-links h4 {
    color: var(--white);
    margin-bottom: 20px;
}

.social-icons {
    display: flex;
    gap: 15px;
}

.social-icons a {
    width: 45px;
    height: 45px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: var(--transition);
}

.social-icons a:hover {
    background: var(--white);
    color: var(--primary-color);
    transform: translateY(-3px);
}

/* Contact Form */
.contact-form {
    background: var(--light-color);
    padding: 50px 40px;
    border-radius: 16px;
}

.form-group {
    margin-bottom: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 15px 20px;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
    background: var(--white);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* ============================================
   Footer
   ============================================ */

.footer {
    background: var(--dark-color);
    color: var(--white);
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 20px;
}

.footer-logo i {
    font-size: 2rem;
    margin-right: 10px;
}

.footer-col p {
    opacity: 0.8;
    margin-bottom: 20px;
    line-height: 1.8;
}

.footer-col h4 {
    color: var(--white);
    margin-bottom: 20px;
    font-size: 1.15rem;
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 12px;
}

.footer-col ul li a {
    color: var(--white);
    opacity: 0.8;
    transition: var(--transition);
}

.footer-col ul li a:hover {
    opacity: 1;
    padding-left: 5px;
}

.footer-contact li {
    display: flex;
    align-items: start;
    gap: 10px;
    margin-bottom: 15px;
    opacity: 0.8;
}

.footer-contact i {
    margin-top: 3px;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    transition: var(--transition);
}

.footer-social a:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-bottom p {
    opacity: 0.8;
}

.footer-links {
    display: flex;
    gap: 30px;
}

.footer-links a {
    color: var(--white);
    opacity: 0.8;
    transition: var(--transition);
}

.footer-links a:hover {
    opacity: 1;
}

/* ============================================
   Scroll to Top Button
   ============================================ */

.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: var(--white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

.scroll-top.show {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    transform: translateY(-5px);
}

/* ============================================
   Animations
   ============================================ */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 1024px) {
    .container {
        padding: 0 30px;
    }
    
    .detail-content,
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
    
    .contact-wrapper {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    html {
        font-size: 14px;
    }
    
    h1 {
        font-size: 2.5rem;
    }
    
    h2 {
        font-size: 2rem;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: var(--white);
        flex-direction: column;
        align-items: flex-start;
        padding: 30px;
        box-shadow: var(--shadow-lg);
        transition: var(--transition);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background: var(--light-color);
        margin-top: 10px;
        border-radius: 8px;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .tech-projects-grid,
    .ecommerce-services {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .about-stats {
        position: static;
        margin-top: 20px;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-buttons {
        flex-direction: column;
        align-items: stretch;
    }
    
    .btn-lg {
        padding: 14px 30px;
    }
    
    .stat-item h3 {
        font-size: 2rem;
    }
    
    .hero-stats {
        gap: 15px;
    }
    
    .scroll-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
    }
}

/* ============================================
   Print Styles
   ============================================ */

@media print {
    .header,
    .hero,
    .scroll-top,
    .contact-form {
        display: none;
    }
}

/* ============================================
   Bottom Navigation (Mobile App Style)
   ============================================ */

.bottom-nav {
    display: none;
}

@media (max-width: 768px) {
    .bottom-nav {
        display: flex;
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        z-index: 9999;
        background: #ffffff;
        border-top: 1px solid #e2e8f0;
        box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.12);
        padding: 6px 0 max(6px, env(safe-area-inset-bottom));
        justify-content: space-around;
        align-items: flex-end;
    }

    .bottom-nav-item {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 3px;
        flex: 1;
        padding: 4px 0;
        color: #94a3b8;
        font-size: 0.65rem;
        font-weight: 500;
        text-decoration: none;
        transition: color 0.2s ease;
        position: relative;
    }

    .bottom-nav-item i {
        font-size: 1.35rem;
        transition: transform 0.2s ease, color 0.2s ease;
    }

    .bottom-nav-item.active {
        color: var(--primary-color);
    }

    .bottom-nav-item.active i {
        transform: translateY(-2px);
    }

    /* Active indicator dot */
    .bottom-nav-item.active::after {
        content: '';
        position: absolute;
        bottom: -4px;
        left: 50%;
        transform: translateX(-50%);
        width: 4px;
        height: 4px;
        background: var(--primary-color);
        border-radius: 50%;
    }

    /* Center CTA button */
    .bottom-nav-center {
        position: relative;
        top: -10px;
        color: var(--primary-color);
    }

    .bottom-nav-center-btn {
        width: 52px;
        height: 52px;
        background: var(--gradient-primary);
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        box-shadow: 0 4px 15px rgba(37, 99, 235, 0.4);
        margin-bottom: 2px;
    }

    .bottom-nav-center-btn i {
        font-size: 1.3rem;
        color: white;
        transform: none !important;
    }

    .bottom-nav-center span {
        color: var(--primary-color);
        font-weight: 600;
    }

    /* Thêm padding bottom để content không bị che */
    body {
        padding-bottom: 70px;
    }

    /* Ẩn scroll-top button trên mobile khi có bottom nav */
    .scroll-top {
        bottom: 80px !important;
        right: 15px !important;
    }
}