:root {
    /* Color Palette - Deep Red / Maroon with Golden Flame Accent */
    --primary: #3B1218; /* Very Deep Red / Dark Maroon */
    --primary-light: #5A1B24;
    --primary-lighter: #7B2430;
    --accent: #F39C12; /* Golden Flame Accent */
    --accent-hover: #F1C40F;
    
    --bg-light: #F8FAFC;
    --text-main: #1E293B;
    --text-muted: #64748B;
    --white: #FFFFFF;
    
    /* Typography */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    /* Variables */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    color: var(--text-main);
    line-height: 1.6;
    background-color: var(--white);
    overflow-x: hidden;
}

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

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

ul {
    list-style: none;
}

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

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section-padding {
    padding: 100px 0;
}

.bg-light {
    background-color: var(--bg-light);
}

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

/* Utility Classes */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.btn-primary {
    background-color: var(--accent);
    color: #fff;
    text-shadow: 0 1px 2px rgba(0,0,0,0.2);
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(243, 156, 18, 0.3);
}

.btn-secondary {
    background-color: rgba(255, 255, 255, 0.15);
    color: var(--white);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
}

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

.btn-outline:hover {
    background: var(--accent);
    color: #fff;
}

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

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

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

.btn-link:hover {
    color: var(--accent);
    gap: 12px;
}

.full-width {
    width: 100%;
}
.block { display: block; text-align: center; }
.mt-5 { margin-top: 40px; }
.mb-3 { margin-bottom: 24px; }

/* Section Headers */
.section-badge {
    color: var(--primary-lighter);
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 0.875rem;
    margin-bottom: 12px;
    font-weight: 700;
}

.section-title {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 20px;
}

.section-subtitle {
    color: var(--text-muted);
    font-size: 1.125rem;
    max-width: 700px;
    margin: 0 auto;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 15px 0;
    transition: var(--transition);
}

.header.scrolled {
    background: rgba(59, 18, 24, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--white);
    font-family: var(--font-heading);
}

.logo-img {
    height: 40px;
    width: auto;
    object-fit: contain;
}

.header:not(.scrolled) .nav-links a {
    color: var(--white);
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    color: var(--white);
    font-weight: 500;
    font-size: 1rem;
    position: relative;
    padding: 5px 0;
}

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

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

.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--white);
    font-size: 1.8rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.parallax-img {
    width: 100%;
    height: 120%;
    object-fit: cover;
    transform: translateY(0);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(59, 18, 24, 0.92) 0%, rgba(30, 9, 12, 0.85) 50%, rgba(90, 27, 36, 0.75) 100%);
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

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

.hero-title {
    font-size: 3.8rem;
    margin-bottom: 24px;
    line-height: 1.1;
}

.text-gradient {
    background: linear-gradient(to right, #F39C12, #F8C471);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.2rem;
    margin-bottom: 40px;
    color: #e2e8f0;
    max-width: 90%;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 16px;
}

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

.hero-stats .stat-item:last-child {
    grid-column: 1 / -1;
}

.glass-panel {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-md);
    padding: 30px;
    text-align: center;
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.stat-number {
    font-size: 3rem;
    color: var(--accent);
    margin-bottom: 5px;
}

.stat-label {
    font-weight: 500;
    letter-spacing: 1px;
}

/* About Section */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-image {
    position: relative;
    border-radius: var(--radius-lg);
}

.about-image img {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.experience-badge {
    position: absolute;
    bottom: -20px;
    right: -20px;
    background: var(--primary);
    color: var(--white);
    padding: 20px 30px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: 15px;
    box-shadow: 0 10px 25px rgba(59, 18, 24, 0.4);
}

.experience-badge i {
    font-size: 2rem;
    color: var(--accent);
}

.experience-badge span {
    font-weight: 700;
    font-family: var(--font-heading);
    font-size: 1.1rem;
    line-height: 1.2;
}

.bounce {
    animation: bounce 3s infinite;
}

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

.about-desc {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 24px;
}

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

.about-list li {
    margin-bottom: 15px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.about-list i {
    color: var(--accent);
    font-size: 1.3rem;
    margin-top: 2px;
}

/* Services */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 50px;
}

.service-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid #f1f5f9;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-lighter);
}

.card-icon {
    width: 70px;
    height: 70px;
    background: #fff5f5;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 24px;
    transition: var(--transition);
}

.service-card:hover .card-icon {
    background: var(--primary);
    color: var(--accent);
}

.card-title {
    font-size: 1.4rem;
    margin-bottom: 12px;
}

.card-desc {
    color: var(--text-muted);
}

/* Clients & Testimonials Section */
.clients-logo-wrap {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 40px;
    margin-top: 50px;
    padding: 40px 0;
    border-top: 1px solid #e2e8f0;
    border-bottom: 1px solid #e2e8f0;
}

.client-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    color: #94a3b8;
    font-weight: 700;
    transition: var(--transition);
    filter: grayscale(100%);
    opacity: 0.7;
}

.client-logo:hover {
    filter: grayscale(0%);
    opacity: 1;
    color: var(--primary);
}

.client-logo i {
    font-size: 2rem;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.testimonial-card {
    background: #fff;
    padding: 40px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    position: relative;
    border: 1px solid #f1f5f9;
}

.quote-icon {
    position: absolute;
    top: -20px;
    left: 40px;
    width: 50px;
    height: 50px;
    background: var(--accent);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: 0 5px 15px rgba(243, 156, 18, 0.4);
}

.t-text {
    font-size: 1.1rem;
    font-style: italic;
    color: var(--text-main);
    margin-bottom: 24px;
    margin-top: 10px;
}

.t-author {
    display: flex;
    align-items: center;
    gap: 16px;
}

.t-avatar img {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid #f1f5f9;
}

.t-info h4 {
    color: var(--primary);
    font-size: 1.1rem;
}

.t-info span {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* Pricing */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 50px;
    align-items: center;
}

.pricing-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 45px 30px;
    box-shadow: var(--shadow-md);
    position: relative;
    border: 1px solid #e2e8f0;
    transition: var(--transition);
}

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

.pricing-card.popular {
    background: var(--primary);
    color: var(--white);
    transform: scale(1.05);
    border: none;
    box-shadow: 0 20px 30px rgba(59, 18, 24, 0.2);
}

.pricing-card.popular:hover {
    transform: scale(1.05) translateY(-5px);
}

.popular-badge {
    position: absolute;
    top: 0;
    right: 30px;
    background: var(--accent);
    color: #000;
    padding: 8px 16px;
    font-weight: 700;
    font-size: 0.875rem;
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
    text-transform: uppercase;
}

.pricing-header {
    text-align: center;
    margin-bottom: 30px;
    padding-bottom: 30px;
    border-bottom: 1px solid #e2e8f0;
}

.pricing-card.popular .pricing-header {
    border-color: rgba(255, 255, 255, 0.1);
}

.plan-name {
    font-size: 1.6rem;
    margin-bottom: 8px;
}

.plan-desc {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 20px;
}

.pricing-card.popular .plan-desc {
    color: rgba(255, 255, 255, 0.7);
}

.plan-price .price-val {
    font-size: 3rem;
    font-weight: 800;
    font-family: var(--font-heading);
    color: var(--primary);
}
.pricing-card.popular .plan-price .price-val { color: var(--white); }

.plan-price .price-period {
    color: var(--text-muted);
}
.pricing-card.popular .plan-price .price-period {
    color: rgba(255, 255, 255, 0.7);
}

.pricing-features ul li {
    margin-bottom: 16px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.pricing-features i {
    color: var(--accent);
    margin-top: 4px;
}

.pricing-features li.unavailable {
    color: var(--text-muted);
    text-decoration: line-through;
}

.pricing-features li.unavailable i {
    color: #cbd5e1;
}

.pricing-footer {
    margin-top: 30px;
}

/* Careers Section */
.gallery-wrap {
    margin-bottom: 60px;
}
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 15px;
    margin-top: 40px;
}
.gallery-img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    cursor: pointer;
    box-shadow: var(--shadow-sm);
}
.gallery-img:hover {
    transform: scale(1.03);
    box-shadow: var(--shadow-lg);
    z-index: 10;
}

/* Careers Section */
.career-wrap {
    background: var(--primary);
    border-radius: var(--radius-lg);
    padding: 60px;
    color: #fff;
    position: relative;
    overflow: hidden;
}

.career-wrap::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(243, 156, 18, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

.badge-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(243, 156, 18, 0.2);
    color: var(--accent);
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 16px;
    letter-spacing: 1px;
}

.career-header h2 {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.career-header p {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.8);
    max-width: 600px;
    margin: 0 auto 40px auto;
}

.job-card {
    background: #fff;
    color: var(--text-main);
    border-radius: var(--radius-md);
    padding: 40px;
    box-shadow: var(--shadow-lg);
}

.job-title-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 20px;
    border-bottom: 2px solid #f1f5f9;
    margin-bottom: 30px;
}

.job-title-row h3 {
    font-size: 1.6rem;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 12px;
}

.job-count {
    background: #fef3c7;
    color: #d97706;
    padding: 6px 16px;
    border-radius: 50px;
    font-weight: 700;
    font-size: 0.95rem;
}

.job-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.jd-section h4 {
    font-size: 1.2rem;
    color: var(--primary-lighter);
    margin-bottom: 16px;
}

.jd-section ul {
    list-style: initial;
    padding-left: 20px;
}

.jd-section ul li {
    margin-bottom: 10px;
    font-size: 0.95rem;
    color: #475569;
}

.jd-section strong {
    color: var(--primary);
}

.job-apply {
    margin-top: 40px;
    padding: 24px;
    background: #fff5f5;
    border-radius: var(--radius-md);
    border-left: 6px solid var(--accent);
}

.job-apply p {
    margin-bottom: 8px;
    font-size: 1.05rem;
}

.job-apply i {
    color: var(--primary);
    width: 24px;
}

.job-apply .deadline {
    color: #dc2626;
    margin-top: 12px;
    font-weight: 500;
}

/* Contact */
.contact-wrap {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 1px solid #e2e8f0;
}

.contact-info {
    padding: 60px;
    background: var(--primary);
    color: var(--white);
    position: relative;
}

.contact-title {
    color: var(--white);
    margin-bottom: 16px;
    font-size: 2.2rem;
}

.contact-desc {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 40px;
    font-size: 1.1rem;
}

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

.info-item .icon {
    width: 50px;
    height: 50px;
    background: rgba(243, 156, 18, 0.15);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--accent);
    flex-shrink: 0;
}

.info-item h4 {
    margin-bottom: 5px;
    font-size: 1.1rem;
}

.info-item p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
}

.contact-form-wrap {
    background: var(--white);
    padding: 60px 40px;
    color: var(--text-main);
}

.contact-form h3 {
    margin-bottom: 30px;
    font-size: 2rem;
    color: var(--primary);
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--primary);
    font-size: 0.9rem;
}

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid #cbd5e1;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
    background: #f8fafc;
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--primary-lighter);
    box-shadow: 0 0 0 3px rgba(123, 36, 48, 0.1);
    background: #fff;
}

/* Footer */
.footer {
    background: #1C090C; /* Darkest Red/Black tint */
    color: rgba(255, 255, 255, 0.7);
    padding-top: 80px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1.2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 60px;
}

.footer-logo {
    margin-bottom: 20px;
}

.brand-col p {
    margin-bottom: 24px;
    line-height: 1.8;
}

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

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

.social-links a:hover {
    background: var(--accent);
    color: #fff;
}

.footer-col h4 {
    color: var(--white);
    font-size: 1.2rem;
    margin-bottom: 24px;
}

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

.footer-col ul li a:hover {
    color: var(--accent);
    padding-left: 5px;
}

.footer-contact-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}
.footer-contact-list i {
    color: var(--accent);
    margin-top: 4px;
}

.footer-bottom {
    background: #0D0406;
    padding: 24px 0;
    text-align: center;
    font-size: 0.9rem;
}

/* Animations Reveal */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease-out;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 { transition-delay: 0.2s; }
.delay-2 { transition-delay: 0.4s; }

/* Responsive */
@media (max-width: 1024px) {
    .hero-title { font-size: 3rem; }
    .services-grid, .pricing-grid, .testimonials-grid { grid-template-columns: repeat(2, 1fr); }
    .pricing-card.popular { transform: none; }
    .pricing-card.popular:hover { transform: translateY(-5px); }
    .contact-wrap { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
    .job-details { grid-template-columns: 1fr; gap: 20px; }
}

@media (max-width: 768px) {
    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--primary);
        flex-direction: column;
        gap: 0;
        padding: 20px 0;
        clip-path: circle(0 at top right);
        transition: clip-path 0.5s ease-in-out;
    }

    .nav-links.active {
        clip-path: circle(150% at top right);
    }

    .nav-links li {
        text-align: center;
        padding: 15px 0;
    }

    .mobile-toggle { display: block; }
    .header .btn-outline { display: none; }
    
    .hero-content { grid-template-columns: 1fr; text-align: center; padding-top: 40px; }
    .hero-buttons { justify-content: center; }
    .about-grid { grid-template-columns: 1fr; }
    .experience-badge { right: 20px; bottom: -20px; padding: 15px 20px; }
    
    .services-grid, .pricing-grid, .testimonials-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 30px; }
    .contact-info, .contact-form-wrap, .career-wrap, .job-card { padding: 40px 20px; }
    .job-title-row { flex-direction: column; align-items: flex-start; gap: 15px; }
}

@media (max-width: 480px) {
    .hero-title { font-size: 2.2rem; }
    .hero-stats { grid-template-columns: 1fr; }
    .hero-stats .stat-item:last-child { grid-column: auto; }
    .pricing-card { padding: 30px 20px; }
    .clients-logo-wrap { gap: 20px; }
    .client-logo { justify-content: center; width: 100%; margin-bottom: 10px; }
}

/* Floating Actions (Góc trái dưới) */
.floating-actions {
    position: fixed;
    bottom: 30px;
    left: 30px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    z-index: 999;
}
.f-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.5rem;
    box-shadow: 0 4px 10px rgba(0,0,0,0.3);
    transition: var(--transition);
    position: relative;
    text-decoration: none;
}
.f-btn:hover {
    transform: scale(1.1) translateY(-3px);
    color: #fff;
}
.btn-zalo { background: #0068FF; font-family: sans-serif; font-weight: bold; font-size: 0.9rem; letter-spacing: 0.5px;}
.btn-fb { background: #1877F2; }
.btn-phone { background: #25D366; animation: wiggle 2s infinite; }
.btn-mail { background: #EA4335; }

@keyframes wiggle {
    0%, 10% { transform: rotate(0deg); }
    15% { transform: rotate(-15deg); }
    20% { transform: rotate(10deg); }
    25% { transform: rotate(-10deg); }
    30% { transform: rotate(5deg); }
    35%, 100% { transform: rotate(0deg); }
}

/* Scroll To Top (Góc phải dưới) */
.scroll-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--accent);
    color: #000;
    font-size: 1.5rem;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 10px rgba(0,0,0,0.3);
    z-index: 999;
    opacity: 0;
    pointer-events: none;
    transform: translateY(20px);
    transition: opacity 0.3s, transform 0.3s, background 0.3s;
}
.scroll-to-top.visible {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}
.scroll-to-top:hover {
    background: var(--accent-hover);
    transform: translateY(-3px);
}

@media (max-width: 768px) {
    .floating-actions { left: 15px; bottom: 15px; gap: 10px; }
    .f-btn { width: 45px; height: 45px; font-size: 1.2rem; }
    .btn-zalo { font-size: 0.8rem; }
    .scroll-to-top { right: 15px; bottom: 15px; width: 45px; height: 45px; font-size: 1.2rem; }
}