:root {
    --primary-color: #c41e3a; /* Traditional Vietnamese Red */
    --primary-light: #e63946;
    --accent-color: #d4af37; /* Gold */
    --text-dark: #1a1a1a;
    --text-light: #666;
    --bg-light: #fdfbf7;
    --glass-bg: rgba(255, 255, 255, 0.8);
    --glass-border: rgba(255, 255, 255, 0.2);
    --container-width: 1100px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

h1, h2, h3 {
    font-family: 'Playfair Display', serif;
    font-weight: 700;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header & Nav */
header {
    height: 80px;
    display: flex;
    align-items: center;
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(253, 251, 247, 0.9);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--primary-color);
}

#nav-logo {
    width: 32px;
    height: 32px;
    border-radius: 8px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-light);
    font-weight: 500;
    transition: var(--transition);
    font-size: 0.95rem;
}

.nav-links a:hover {
    color: var(--primary-color);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.8rem 1.8rem;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
    font-size: 0.95rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    box-shadow: 0 10px 20px rgba(196, 30, 58, 0.2);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 30px rgba(196, 30, 58, 0.3);
}

.btn-outline {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    padding: 0.6rem 1.4rem;
}

.btn-secondary {
    background: white;
    color: var(--text-dark);
    border: 1px solid rgba(0,0,0,0.1);
}

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

/* Hero Section */
.hero {
    padding: 180px 0 100px;
    position: relative;
    overflow: hidden;
}

.hero-content {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-text h1 {
    font-size: 3.5rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

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

.hero-text p {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 2.5rem;
    max-width: 500px;
}

.hero-btns {
    display: flex;
    gap: 1rem;
}

.hero-image {
    position: relative;
}

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 10px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
}

.mockup-img {
    width: 100%;
    border-radius: 16px;
    display: block;
}

/* Shapes */
.hero-bg-shapes .shape {
    position: absolute;
    z-index: -1;
    filter: blur(80px);
    border-radius: 50%;
}

.shape-1 {
    width: 400px;
    height: 400px;
    background: rgba(196, 30, 58, 0.1);
    top: -100px;
    right: -100px;
}

.shape-2 {
    width: 300px;
    height: 300px;
    background: rgba(212, 175, 55, 0.1);
    bottom: 50px;
    left: -50px;
}

/* Features */
.features {
    padding: 100px 0;
    background: white;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 4rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
}

.feature-card {
    padding: 2.5rem;
    border-radius: 24px;
    background: var(--bg-light);
    transition: var(--transition);
    border: 1px solid transparent;
}

.feature-card:hover {
    transform: translateY(-10px);
    background: white;
    box-shadow: 0 20px 40px rgba(0,0,0,0.05);
    border-color: rgba(196, 30, 58, 0.1);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.feature-card h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
}

.feature-card p {
    color: var(--text-light);
}

/* Preview Section */
.preview {
    padding: 100px 0;
    background: var(--bg-light);
}

.preview-container {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 5rem;
    align-items: center;
}

.preview-text h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.preview-list {
    list-style: none;
    margin-top: 2rem;
}

.preview-list li {
    padding-left: 1.5rem;
    position: relative;
    margin-bottom: 1rem;
    color: var(--text-light);
}

.preview-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.preview-visual img {
    width: 100%;
    border-radius: 24px;
    box-shadow: 0 30px 60px -12px rgba(0, 0, 0, 0.2);
}

.floating {
    animation: floating 3s ease-in-out infinite;
}

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

/* CTA Section */
.cta {
    padding: 100px 0;
}

.cta-card {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 32px;
    padding: 5rem;
    text-align: center;
    color: white;
}

.cta-card h2 {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.cta-card p {
    font-size: 1.2rem;
    margin-bottom: 2.5rem;
    opacity: 0.9;
}

/* Footer */
footer {
    padding: 80px 0 40px;
    background: #111;
    color: white;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-info h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--accent-color);
}

.footer-info p {
    opacity: 0.6;
    max-width: 300px;
}

.footer-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.link-group h4 {
    margin-bottom: 1.5rem;
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
}

.link-group ul {
    list-style: none;
}

.link-group ul li {
    margin-bottom: 0.8rem;
}

.link-group a {
    color: white;
    text-decoration: none;
    opacity: 0.6;
    transition: var(--transition);
}

.link-group a:hover {
    opacity: 1;
    color: var(--accent-color);
}

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    text-align: center;
    opacity: 0.4;
    font-size: 0.9rem;
}

.footer-bottom a {
    color: white;
    text-decoration: none;
}

/* Animations */
.fade-in {
    opacity: 0;
    animation: fadeIn 1s forwards;
}

.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }
.delay-3 { animation-delay: 0.6s; }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-up {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s ease-out;
}

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

/* Responsive */
@media (max-width: 968px) {
    .hero-content, .preview-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-text h1 {
        font-size: 2.8rem;
    }
    
    .hero-text p {
        margin: 0 auto 2.5rem;
    }
    
    .hero-btns {
        justify-content: center;
    }
    
    .preview-container {
        flex-direction: column-reverse;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .nav-links {
        display: none; /* Mobile nav could be added */
    }
}