/* ==================== ROOT VARIABLES ==================== */
:root {
    --primary: #6c5ce7;
    --primary-dark: #5543d9;
    --secondary: #00cec9;
    --accent: #fd79a8;
    --gradient: linear-gradient(135deg, #6c5ce7 0%, #a855f7 50%, #fd79a8 100%);
    --gradient-2: linear-gradient(135deg, #00cec9 0%, #0984e3 100%);
    --gradient-facebook: linear-gradient(135deg, #1877f2 0%, #0d5bce 100%);
    --gradient-instagram: linear-gradient(135deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%);
    --gradient-youtube: linear-gradient(135deg, #ff0000 0%, #cc0000 100%);
    --gradient-tiktok: linear-gradient(135deg, #000000 0%, #25f4ee 50%, #fe2c55 100%);
    --gradient-twitter: linear-gradient(135deg, #1da1f2 0%, #0d8bd9 100%);
    --gradient-google: linear-gradient(135deg, #4285f4 0%, #34a853 25%, #fbbc05 50%, #ea4337 100%);
    --dark: #1a1a2e;
    --dark-light: #16213e;
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-600: #6c757d;
    --gray-800: #343a40;
    --white: #ffffff;
    --success: #00b894;
    --warning: #fdcb6e;
    --danger: #ff4757;
    --shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.2);
    --radius: 12px;
    --radius-lg: 20px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==================== RESET & BASE ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: 'Poppins', sans-serif;
    color: var(--gray-800);
    background: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

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

/* ==================== BUTTONS ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    font-size: 14px;
    font-weight: 600;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-lg {
    padding: 16px 36px;
    font-size: 16px;
}

.btn-block {
    width: 100%;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(108, 92, 231, 0.4);
}

.btn-gradient {
    background: var(--gradient);
    color: var(--white);
}

.btn-gradient:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(108, 92, 231, 0.5);
}

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

.btn-outline:hover {
    background: var(--primary);
    color: var(--white);
    transform: translateY(-2px);
}

/* ==================== NAVBAR ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.nav-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 28px;
    font-weight: 800;
    color: var(--dark);
}

.logo i {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo .highlight {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    gap: 30px;
}

.nav-link {
    font-size: 15px;
    font-weight: 500;
    color: var(--gray-600);
    position: relative;
    padding: 5px 0;
}

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

.nav-link:hover,
.nav-link.active {
    color: var(--primary);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

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

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

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

/* ==================== HERO SECTION ==================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient);
    opacity: 0.9;
}

.particles {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
}

.particles::before {
    content: '';
    position: absolute;
    width: 300px;
    height: 300px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    top: -150px;
    right: -100px;
    animation: float 8s infinite ease-in-out;
}

.particles::after {
    content: '';
    position: absolute;
    width: 200px;
    height: 200px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 50%;
    bottom: -100px;
    left: -50px;
    animation: float 10s infinite ease-in-out reverse;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-30px) rotate(180deg); }
}

.hero-content {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-text {
    color: var(--white);
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 20px;
    backdrop-filter: blur(10px);
}

.hero-text h1 {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
}

.gradient-text {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-text p {
    font-size: 18px;
    opacity: 0.9;
    margin-bottom: 30px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    margin-bottom: 50px;
}

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

.btn.btn-white:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

.hero-stats {
    display: flex;
    gap: 40px;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 36px;
    font-weight: 800;
}

.stat-label {
    display: block;
    font-size: 14px;
    opacity: 0.8;
    margin-top: 5px;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.social-icons-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.icon-card {
    width: 100px;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
    font-size: 40px;
    color: var(--white);
    transition: var(--transition);
    animation: float 6s infinite ease-in-out;
}

.icon-card:nth-child(2) { animation-delay: 0.5s; }
.icon-card:nth-child(3) { animation-delay: 1s; }
.icon-card:nth-child(4) { animation-delay: 1.5s; }
.icon-card:nth-child(5) { animation-delay: 2s; }
.icon-card:nth-child(6) { animation-delay: 2.5s; }
.icon-card:nth-child(7) { animation-delay: 3s; }
.icon-card:nth-child(8) { animation-delay: 3.5s; }

.icon-card:hover {
    transform: scale(1.1) rotate(5deg);
    background: rgba(255, 255, 255, 0.3);
}

.hero-wave {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
}

.hero-wave svg {
    display: block;
    width: 100%;
    height: auto;
}

.animate-fade-in {
    animation: fadeIn 1s ease-out;
}

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

.animate-float {
    animation: floatAnimation 6s ease-in-out infinite;
}

@keyframes floatAnimation {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

/* ==================== SECTION STYLES ==================== */
section {
    padding: 100px 0;
}

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

.section-badge {
    display: inline-block;
    padding: 8px 20px;
    background: linear-gradient(135deg, rgba(108, 92, 231, 0.1) 0%, rgba(253, 121, 168, 0.1) 100%);
    border-radius: 50px;
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 15px;
}

.section-title {
    font-size: 42px;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 15px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--gray-600);
    max-width: 600px;
    margin: 0 auto;
}

/* ==================== SERVICES SECTION ==================== */
.services {
    background: var(--gray-100);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 30px;
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: var(--gradient);
    transform: scaleX(0);
    transition: var(--transition);
}

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

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card.featured {
    border: 2px solid var(--primary);
}

.service-badge-popular {
    position: absolute;
    top: 15px;
    right: -35px;
    background: var(--gradient);
    color: var(--white);
    padding: 5px 40px;
    font-size: 12px;
    font-weight: 600;
    transform: rotate(45deg);
    text-transform: uppercase;
}

.service-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 36px;
    color: var(--white);
}

.facebook-bg { background: var(--gradient-facebook); }
.instagram-bg { background: var(--gradient-instagram); }
.youtube-bg { background: var(--gradient-youtube); }
.tiktok-bg { background: var(--gradient-tiktok); }
.twitter-bg { background: var(--gradient-twitter); }
.google-bg { background: var(--gradient-google); }

.service-card h3 {
    font-size: 24px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 20px;
}

.service-list {
    text-align: left;
    margin-bottom: 25px;
}

.service-list li {
    padding: 10px 0;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 15px;
    color: var(--gray-600);
}

.service-list li:last-child {
    border-bottom: none;
}

.service-list li i {
    color: var(--success);
    font-size: 14px;
}

.service-price {
    margin-bottom: 20px;
}

.price-label {
    display: block;
    font-size: 14px;
    color: var(--gray-600);
}

.price-value {
    font-size: 28px;
    font-weight: 800;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.btn-service {
    background: var(--gradient);
    color: var(--white);
    padding: 12px 30px;
    border-radius: 50px;
    font-weight: 600;
    display: inline-block;
}

.btn-service:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(108, 92, 231, 0.4);
}

/* ==================== PRICING SECTION ==================== */
.pricing-tabs {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 12px 30px;
    border: 2px solid var(--gray-300);
    background: var(--white);
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}

.tab-btn i {
    font-size: 18px;
}

.tab-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.tab-btn.active {
    background: var(--gradient);
    border-color: transparent;
    color: var(--white);
}

.pricing-table {
    display: none;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 30px;
}

.pricing-table.active {
    display: grid;
}

.pricing-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    border: 2px solid transparent;
}

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

.pricing-card.popular {
    border-color: var(--primary);
    transform: scale(1.05);
}

.pricing-card.popular:hover {
    transform: scale(1.05) translateY(-10px);
}

.popular-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient);
    color: var(--white);
    padding: 5px 20px;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
}

.pricing-header {
    text-align: center;
    margin-bottom: 25px;
    padding-bottom: 25px;
    border-bottom: 2px dashed var(--gray-200);
}

.pricing-header h4 {
    font-size: 22px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 15px;
}

.price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 5px;
}

.currency {
    font-size: 20px;
    font-weight: 600;
    color: var(--gray-600);
}

.amount {
    font-size: 36px;
    font-weight: 800;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.period {
    font-size: 14px;
    color: var(--gray-600);
}

.pricing-features {
    margin-bottom: 25px;
}

.pricing-features li {
    padding: 10px 0;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--gray-600);
}

.pricing-features li i {
    color: var(--success);
    font-size: 16px;
}

/* ==================== ORDER SECTION ==================== */
.order-section {
    background: var(--gray-100);
}

.order-wrapper {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 40px;
}

.order-form-container {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 10px;
}

.form-group label i {
    color: var(--primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius);
    font-size: 15px;
    font-family: 'Poppins', sans-serif;
    transition: var(--transition);
    background: var(--gray-100);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    background: var(--white);
    box-shadow: 0 0 0 4px rgba(108, 92, 231, 0.1);
}

.form-group textarea {
    resize: vertical;
}

.order-summary {
    background: linear-gradient(135deg, rgba(108, 92, 231, 0.05) 0%, rgba(253, 121, 168, 0.05) 100%);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 25px;
    text-align: center;
}

.order-summary h4 {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 16px;
    color: var(--dark);
    margin-bottom: 10px;
}

.price-display {
    margin-bottom: 10px;
}

.total-price {
    font-size: 36px;
    font-weight: 800;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.price-note {
    font-size: 12px;
    color: var(--gray-600);
}

.order-info {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.info-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 25px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.info-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.info-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--white);
    margin-bottom: 15px;
}

.info-card h4 {
    font-size: 18px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 10px;
}

.info-card p {
    font-size: 14px;
    color: var(--gray-600);
    line-height: 1.6;
}

/* ==================== TESTIMONIALS SECTION ==================== */
.testimonials {
    background: var(--white);
}

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

.testimonial-card {
    background: var(--gray-100);
    border-radius: var(--radius-lg);
    padding: 30px;
    transition: var(--transition);
}

.testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.testimonial-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.testimonial-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--white);
}

.testimonial-info h4 {
    font-size: 18px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 5px;
}

.stars {
    display: flex;
    gap: 3px;
}

.stars i {
    color: var(--warning);
    font-size: 14px;
}

.testimonial-text {
    font-size: 15px;
    color: var(--gray-600);
    line-height: 1.8;
    margin-bottom: 15px;
    font-style: italic;
}

.testimonial-service {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--white);
    border-radius: 50px;
    font-size: 13px;
    font-weight: 600;
    color: var(--primary);
}

.testimonial-service i {
    font-size: 16px;
}

/* ==================== FAQ SECTION ==================== */
.faq {
    background: var(--gray-100);
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--white);
    border-radius: var(--radius);
    margin-bottom: 15px;
    box-shadow: var(--shadow);
    overflow: hidden;
}

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 25px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    color: var(--dark);
    transition: var(--transition);
}

.faq-question:hover {
    color: var(--primary);
}

.faq-question i {
    transition: var(--transition);
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-question span i {
    margin-right: 10px;
    color: var(--primary);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 200px;
}

.faq-answer p {
    padding: 0 25px 20px;
    font-size: 15px;
    color: var(--gray-600);
    line-height: 1.8;
}

/* ==================== CONTACT SECTION ==================== */
.contact {
    background: var(--white);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.contact-card {
    background: var(--gray-100);
    border-radius: var(--radius-lg);
    padding: 30px;
    text-align: center;
    transition: var(--transition);
}

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

.contact-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 32px;
    color: var(--white);
}

.contact-icon.zalo { background: linear-gradient(135deg, #0068ff 0%, #0041cc 100%); }
.contact-icon.telegram { background: linear-gradient(135deg, #0088cc 0%, #006699 100%); }
.contact-icon.messenger { background: linear-gradient(135deg, #00b2ff 0%, #0078d4 100%); }
.contact-icon.email { background: var(--gradient); }

.contact-card h4 {
    font-size: 20px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 10px;
}

.contact-card p {
    font-size: 14px;
    color: var(--gray-600);
    margin-bottom: 20px;
}

.btn-contact {
    background: var(--white);
    border: 2px solid var(--primary);
    color: var(--primary);
    padding: 10px 25px;
    border-radius: 50px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

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

/* ==================== FOOTER ==================== */
.footer {
    background: var(--dark);
    color: var(--white);
    padding: 60px 0 30px;
}

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

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 28px;
    font-weight: 800;
    margin-bottom: 15px;
}

.footer-logo i {
    color: var(--primary);
}

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

.footer-desc {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
    margin-bottom: 20px;
}

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

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

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

.footer-section h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-section h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background: var(--gradient);
    border-radius: 3px;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--white);
    padding-left: 5px;
}

.footer-stats li {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

.footer-stats li i {
    color: var(--primary);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
}

/* ==================== SCROLL TO TOP ==================== */
.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--gradient);
    color: var(--white);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

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

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

/* ==================== MODAL ==================== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 40px;
    max-width: 450px;
    width: 90%;
    position: relative;
    transform: scale(0.9);
    transition: var(--transition);
}

.modal.active .modal-content {
    transform: scale(1);
}

.modal-close {
    position: absolute;
    top: 15px;
    right: 20px;
    background: none;
    border: none;
    font-size: 32px;
    cursor: pointer;
    color: var(--gray-600);
    transition: var(--transition);
}

.modal-close:hover {
    color: var(--danger);
}

.modal-header {
    text-align: center;
    margin-bottom: 30px;
}

.modal-header i {
    font-size: 60px;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 15px;
}

.modal-header.success i {
    color: var(--success);
    -webkit-text-fill-color: var(--success);
}

.modal-header h3 {
    font-size: 24px;
    font-weight: 700;
    color: var(--dark);
}

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

.modal-form label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 8px;
}

.modal-form input {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius);
    font-size: 15px;
    font-family: 'Poppins', sans-serif;
    transition: var(--transition);
}

.modal-form input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(108, 92, 231, 0.1);
}

.form-footer {
    text-align: center;
    margin-top: 20px;
    font-size: 14px;
    color: var(--gray-600);
}

.form-footer a {
    color: var(--primary);
    font-weight: 600;
}

.modal-body {
    text-align: center;
}

.modal-body p {
    font-size: 15px;
    color: var(--gray-600);
    line-height: 1.8;
    margin-bottom: 15px;
}

.order-id {
    font-size: 16px;
    padding: 15px;
    background: var(--gray-100);
    border-radius: var(--radius);
}

.modal-sm {
    max-width: 400px;
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 992px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-text h1 {
        font-size: 42px;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-stats {
        justify-content: center;
    }

    .hero-image {
        display: none;
    }

    .order-wrapper {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        background: var(--white);
        flex-direction: column;
        padding: 30px;
        gap: 20px;
        box-shadow: var(--shadow-lg);
        transition: var(--transition);
    }

    .nav-menu.active {
        left: 0;
    }

    .hamburger {
        display: flex;
    }

    .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);
    }

    .hero-text h1 {
        font-size: 32px;
    }

    .section-title {
        font-size: 32px;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }

    .pricing-tabs {
        flex-wrap: wrap;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 576px) {
    .hero-text h1 {
        font-size: 28px;
    }

    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }

    .stat-number {
        font-size: 28px;
    }

    section {
        padding: 60px 0;
    }

    .section-title {
        font-size: 28px;
    }

    .order-form-container {
        padding: 25px;
    }
}

/* ==================== ANIMATIONS ==================== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.slide-in-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.slide-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.slide-in-right {
    opacity: 0;
    transform: translateX(50px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.slide-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* Loading spinner for form submission */
.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: var(--white);
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ==================== HIGHLIGHT CLASSES ==================== */

/* 1. Neon Glow Effect */
.highlight-neon {
    color: #00f5ff;
    text-shadow: 0 0 10px #00f5ff, 0 0 20px #00f5ff, 0 0 40px #00f5ff;
    font-weight: 700;
}

/* 2. Fire Gradient */
.highlight-fire {
    background: linear-gradient(135deg, #f5af19, #f12711, #c471ed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
}

/* 3. Rainbow Animated */
.highlight-rainbow {
    background: linear-gradient(90deg, #ff0000, #ff7700, #ffff00, #00ff00, #0000ff, #8b00ff);
    background-size: 400% 400%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
    animation: rainbow 3s ease infinite;
}

@keyframes rainbow {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

/* 4. Gold Premium */
.highlight-gold {
    background: linear-gradient(135deg, #f7971e, #ffd200, #f7971e);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
    text-shadow: 0 2px 10px rgba(255, 210, 0, 0.3);
}

/* 5. Diamond Shine */
.highlight-diamond {
    background: linear-gradient(135deg, #667eea, #764ba2, #f093fb, #4facfe);
    background-size: 300% 300%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
    animation: shine 4s ease infinite;
}

@keyframes shine {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

/* 6. Pulse Red (Attention Grabber) */
.highlight-pulse {
    color: #ff4757;
    animation: pulseHighlight 2s ease-in-out infinite;
    font-weight: 700;
    display: inline-block;
}

@keyframes pulseHighlight {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

/* 7. Glowing Badge */
.highlight-glow {
    background: linear-gradient(135deg, #6c5ce7, #fd79a8);
    color: white;
    padding: 5px 15px;
    border-radius: 50px;
    font-weight: 600;
    box-shadow: 0 0 20px rgba(108, 92, 231, 0.5), 0 0 40px rgba(253, 121, 168, 0.3);
    display: inline-block;
}

/* 8. Electric Blue */
.highlight-electric {
    color: #0984e3;
    text-shadow: 0 0 10px rgba(9, 132, 227, 0.5);
    border-bottom: 3px solid #0984e3;
    padding-bottom: 2px;
    font-weight: 700;
    display: inline-block;
}

/* 9. Sunset Orange */
.highlight-sunset {
    background: linear-gradient(135deg, #ff6a00, #ee0979, #ff6a00);
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
    animation: sunsetShift 3s ease infinite;
}

@keyframes sunsetShift {
    0%, 100% { background-position: 0% center; }
    50% { background-position: 100% center; }
}

/* 10. Emerald Green */
.highlight-emerald {
    background: linear-gradient(135deg, #11998e, #38ef7d);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
    text-shadow: 0 2px 10px rgba(56, 239, 125, 0.3);
}

/* 11. Crystal Clear (Ice Blue) */
.highlight-crystal {
    background: linear-gradient(135deg, #e0eafc, #cfdef3, #a8edea);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
    text-shadow: 0 0 15px rgba(224, 254, 252, 0.5);
}

/* 12. Sparkle Effect */
.highlight-sparkle {
    position: relative;
    color: #ffd700;
    font-weight: 800;
    text-shadow: 0 0 10px rgba(255, 215, 0, 0.5);
}

.highlight-sparkle::before,
.highlight-sparkle::after {
    content: '✨';
    position: absolute;
    animation: sparkleFloat 2s ease-in-out infinite;
}

.highlight-sparkle::before {
    left: -25px;
    top: -5px;
}

.highlight-sparkle::after {
    right: -25px;
    top: -5px;
    animation-delay: 0.5s;
}

@keyframes sparkleFloat {
    0%, 100% { transform: translateY(0); opacity: 1; }
    50% { transform: translateY(-10px); opacity: 0.5; }
}

/* 13. Underline Wave Animation */
.highlight-wave {
    position: relative;
    color: #6c5ce7;
    font-weight: 700;
}

.highlight-wave::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, #6c5ce7, #fd79a8, #6c5ce7);
    background-size: 200% auto;
    animation: waveMove 2s linear infinite;
    border-radius: 3px;
}

@keyframes waveMove {
    0% { background-position: 0% center; }
    100% { background-position: 200% center; }
}

/* 14. Gradient Border */
.highlight-border {
    position: relative;
    padding: 5px 15px;
    border-radius: 8px;
    font-weight: 700;
    background: white;
    z-index: 1;
}

.highlight-border::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(135deg, #6c5ce7, #fd79a8, #00cec9, #6c5ce7);
    background-size: 400% 400%;
    border-radius: 10px;
    z-index: -1;
    animation: borderGlow 3s ease infinite;
}

@keyframes borderGlow {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

/* 15. Shimmer Effect */
.highlight-shimmer {
    background: linear-gradient(90deg, #6c5ce7 0%, #fd79a8 25%, #fff 50%, #fd79a8 75%, #6c5ce7 100%);
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
    animation: shimmer 3s linear infinite;
}

@keyframes shimmer {
    0% { background-position: 0% center; }
    100% { background-position: 200% center; }
}

/* 16. Floating Badge */
.highlight-float {
    display: inline-block;
    padding: 8px 20px;
    background: linear-gradient(135deg, #ff6b6b, #ee5a24);
    color: white;
    border-radius: 50px;
    font-weight: 700;
    box-shadow: 0 5px 20px rgba(255, 107, 107, 0.4);
    animation: floatBadge 3s ease-in-out infinite;
}

@keyframes floatBadge {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

/* 17. Typewriter Effect */
.highlight-typewriter {
    border-right: 3px solid #6c5ce7;
    animation: blink 0.75s step-end infinite;
    font-weight: 700;
    color: #6c5ce7;
}

@keyframes blink {
    from, to { border-color: transparent; }
    50% { border-color: #6c5ce7; }
}

/* 18. Gradient Shadow */
.highlight-shadow {
    position: relative;
    display: inline-block;
    font-weight: 800;
    color: white;
    padding: 10px 20px;
    border-radius: 10px;
    background: linear-gradient(135deg, #6c5ce7, #fd79a8);
    box-shadow: 
        0 5px 15px rgba(108, 92, 231, 0.4),
        0 10px 30px rgba(253, 121, 168, 0.3);
}

/* 19. Rainbow Border Animation */
.highlight-rainbow-border {
    position: relative;
    padding: 10px 25px;
    border-radius: 10px;
    font-weight: 700;
    background: white;
    z-index: 1;
}

.highlight-rainbow-border::before {
    content: '';
    position: absolute;
    top: -3px;
    left: -3px;
    right: -3px;
    bottom: -3px;
    background: linear-gradient(90deg, #ff0000, #ff7700, #ffff00, #00ff00, #0000ff, #8b00ff, #ff0000);
    background-size: 400% 400%;
    border-radius: 13px;
    z-index: -1;
    animation: rainbowBorder 4s ease infinite;
}

@keyframes rainbowBorder {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

/* 20. Magnetic Glow */
.highlight-magnetic {
    position: relative;
    display: inline-block;
    padding: 10px 25px;
    background: linear-gradient(135deg, #00cec9, #0984e3);
    color: white;
    font-weight: 700;
    border-radius: 50px;
    box-shadow: 
        0 0 20px rgba(0, 206, 201, 0.5),
        0 0 40px rgba(0, 206, 201, 0.3),
        0 0 60px rgba(0, 206, 201, 0.2);
    transition: all 0.3s ease;
}

.highlight-magnetic:hover {
    transform: scale(1.05);
    box-shadow: 
        0 0 30px rgba(0, 206, 201, 0.7),
        0 0 60px rgba(0, 206, 201, 0.5),
        0 0 90px rgba(0, 206, 201, 0.3);
}

/* ==================== SCROLL PROGRESS BAR ==================== */
.scroll-progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    z-index: 10000;
    backdrop-filter: blur(5px);
}

.scroll-progress {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, #6c5ce7, #a855f7, #fd79a8, #f5af19, #00cec9);
    background-size: 200% auto;
    animation: progressGradient 3s ease infinite;
    border-radius: 0 3px 3px 0;
    box-shadow: 0 0 10px rgba(108, 92, 231, 0.7), 0 0 20px rgba(253, 121, 168, 0.5);
    transition: width 0.1s ease-out;
    position: relative;
    overflow: hidden;
}

.scroll-progress::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.6), transparent);
    animation: progressShine 2s ease-in-out infinite;
}

@keyframes progressGradient {
    0%, 100% { background-position: 0% center; }
    50% { background-position: 100% center; }
}

@keyframes progressShine {
    0% { left: -100%; }
    100% { left: 100%; }
}

/* ==================== ZALO CHAT BUTTON (LEFT SIDE) ==================== */
.zalo-chat {
    position: fixed;
    left: 20px;
    bottom: 30px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.zalo-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    box-shadow: 0 5px 25px rgba(0, 104, 255, 0.4);
    animation: zaloFloat 3s ease-in-out infinite;
    transition: all 0.3s ease;
    border: 3px solid white;
}

.zalo-chat:hover .zalo-icon {
    transform: scale(1.15) rotate(10deg);
    box-shadow: 0 8px 35px rgba(0, 104, 255, 0.6);
}

.zalo-tooltip {
    background: white;
    color: #333;
    padding: 8px 15px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    white-space: nowrap;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.3s ease;
    pointer-events: none;
    margin-bottom: 5px;
}

.zalo-tooltip::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-top: 8px solid white;
}

.zalo-chat:hover .zalo-tooltip {
    opacity: 1;
    transform: translateY(0);
}

.zalo-badge {
    background: linear-gradient(135deg, #0068ff, #0041cc);
    color: white;
    padding: 4px 12px;
    border-radius: 50px;
    font-size: 11px;
    font-weight: 700;
    box-shadow: 0 3px 15px rgba(0, 104, 255, 0.4);
    letter-spacing: 0.5px;
}

@keyframes zaloFloat {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

/* Zalo pulse ring effect */
.zalo-chat::before {
    content: '';
    position: absolute;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: rgba(0, 104, 255, 0.3);
    animation: zaloPulse 2s ease-out infinite;
    z-index: -1;
}

.zalo-chat::after {
    content: '';
    position: absolute;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: rgba(0, 104, 255, 0.2);
    animation: zaloPulse 2s ease-out infinite;
    animation-delay: 0.5s;
    z-index: -1;
}

@keyframes zaloPulse {
    0% {
        transform: scale(1);
        opacity: 0.7;
    }
    100% {
        transform: scale(1.8);
        opacity: 0;
    }
}

/* ==================== RESPONSIVE FOR NEW ELEMENTS ==================== */
@media (max-width: 768px) {
    .zalo-icon {
        width: 50px;
        height: 50px;
    }

    .zalo-chat::before,
    .zalo-chat::after {
        width: 50px;
        height: 50px;
    }

    .zalo-tooltip {
        font-size: 12px;
        padding: 6px 12px;
    }

    .zalo-badge {
        font-size: 10px;
    }

    .scroll-progress-bar {
        height: 3px;
    }
}

@media (max-width: 576px) {
    .zalo-chat {
        left: 15px;
        bottom: 25px;
    }

    .zalo-tooltip {
        display: none;
    }
}