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

:root {
    --primary: #10B981;
    --primary-dark: #059669;
    --primary-light: #D1FAE5;
    --secondary: #3B82F6;
    --dark: #1F2937;
    --gray: #6B7280;
    --light-gray: #F3F4F6;
    --white: #FFFFFF;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Sarabun', sans-serif;
    line-height: 1.6;
    color: var(--dark);
    background: var(--white);
}

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

/* Navigation */
.navbar {
    background: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.logo {
    font-size: 2rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: var(--dark);
    font-weight: 500;
    transition: color 0.3s;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    border: 2px solid transparent;
    cursor: pointer;
}

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

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

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

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

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

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

.btn-large {
    padding: 16px 32px;
    font-size: 1.1rem;
}

.btn-download {
    background: var(--white);
    border: 2px solid var(--primary);
    padding: 20px 30px;
    display: flex;
    align-items: center;
    gap: 15px;
    min-width: 250px;
}

.btn-download:hover {
    background: var(--primary-light);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

/* Hero Section */
.hero {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--white) 100%);
}

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

.badge {
    display: inline-block;
    background: var(--primary);
    color: var(--white);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--dark);
}

.hero-description {
    font-size: 1.2rem;
    color: var(--gray);
    margin-bottom: 30px;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    margin-bottom: 40px;
}

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

.stat {
    text-align: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
}

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

/* Phone Mockup */
.phone-mockup {
    position: relative;
    width: 300px;
    height: 600px;
    background: var(--dark);
    border-radius: 40px;
    padding: 15px;
    box-shadow: var(--shadow-lg);
    margin: 0 auto;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: var(--white);
    border-radius: 30px;
    overflow: hidden;
}

.phone-screen img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.placeholder-screen {
    padding: 20px;
}

.placeholder-header {
    font-size: 1.2rem;
    font-weight: 700;
    text-align: center;
    padding: 20px;
    background: var(--primary);
    color: var(--white);
    border-radius: 10px;
    margin-bottom: 20px;
}

.placeholder-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.placeholder-card {
    background: var(--light-gray);
    padding: 30px 20px;
    border-radius: 10px;
    text-align: center;
    font-weight: 600;
}

/* Features Section */
.features {
    padding: 80px 0;
    background: var(--white);
}

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

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 15px;
}

.section-header p {
    font-size: 1.2rem;
    color: var(--gray);
}

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

.feature-card {
    background: var(--white);
    padding: 30px;
    border-radius: 12px;
    border: 2px solid var(--light-gray);
    transition: all 0.3s;
}

.feature-card:hover {
    border-color: var(--primary);
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 15px;
}

.feature-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 10px;
}

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

/* Marketplace Section */
.marketplace {
    padding: 80px 0;
    background: var(--light-gray);
}

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

.marketplace h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.marketplace p {
    font-size: 1.1rem;
    color: var(--gray);
    margin-bottom: 30px;
}

.feature-list {
    list-style: none;
    margin-bottom: 30px;
}

.feature-list li {
    padding: 10px 0;
    font-size: 1.1rem;
}

.marketplace-card {
    background: var(--white);
    border-radius: 12px;
    padding: 25px;
    box-shadow: var(--shadow-lg);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--light-gray);
}

.card-header span:first-child {
    font-size: 1.5rem;
}

.card-product {
    margin-bottom: 20px;
}

.product-name {
    font-weight: 600;
    margin-bottom: 15px;
}

.product-price, .product-profit {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
}

.price-label, .profit-label {
    color: var(--gray);
    font-size: 0.9rem;
}

.price {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.profit {
    font-weight: 600;
    color: var(--secondary);
}

.card-button {
    width: 100%;
    padding: 15px;
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.card-button:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

/* Pricing Section */
.pricing {
    padding: 80px 0;
    background: var(--white);
}

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

.pricing-card {
    background: var(--white);
    border: 2px solid var(--light-gray);
    border-radius: 12px;
    padding: 40px 30px;
    position: relative;
    transition: all 0.3s;
}

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

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

.featured-badge {
    position: absolute;
    top: -15px;
    right: 30px;
    background: var(--primary);
    color: var(--white);
    padding: 8px 20px;
    border-radius: 20px;
    font-weight: 600;
}

.pricing-header {
    text-align: center;
    margin-bottom: 30px;
    padding-bottom: 30px;
    border-bottom: 2px solid var(--light-gray);
}

.pricing-header h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
}

.price {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.price-amount {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary);
}

.price-period {
    color: var(--gray);
    font-size: 0.9rem;
}

.pricing-features {
    list-style: none;
    margin-bottom: 30px;
}

.pricing-features li {
    padding: 12px 0;
    border-bottom: 1px solid var(--light-gray);
}

/* Download Section */
.download {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
    text-align: center;
}

.download h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.download p {
    font-size: 1.2rem;
    margin-bottom: 40px;
    opacity: 0.9;
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 40px;
}

.download-icon {
    font-size: 2.5rem;
}

.download-text {
    text-align: left;
}

.download-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--dark);
}

.download-subtitle {
    font-size: 0.9rem;
    color: var(--gray);
}

.download-info {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-bottom: 40px;
}

.info-item {
    opacity: 0.9;
}

.installation-guide {
    max-width: 600px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.1);
    padding: 30px;
    border-radius: 12px;
    text-align: left;
}

.installation-guide h3 {
    margin-bottom: 20px;
}

.installation-guide ol {
    padding-left: 20px;
}

.installation-guide li {
    padding: 8px 0;
}

/* Contact Section */
.contact {
    padding: 80px 0;
    background: var(--light-gray);
}

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

.contact-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 12px;
    text-align: center;
    transition: all 0.3s;
}

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

.contact-icon {
    font-size: 3rem;
    margin-bottom: 15px;
}

.contact-card h3 {
    margin-bottom: 10px;
}

.contact-card p {
    color: var(--primary);
    font-weight: 600;
}

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

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    margin-bottom: 20px;
    font-size: 1.2rem;
}

.footer-section p {
    opacity: 0.8;
    line-height: 1.8;
}

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

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

.footer-section a {
    color: var(--white);
    text-decoration: none;
    opacity: 0.8;
    transition: opacity 0.3s;
}

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

.social-links {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.social-link {
    display: inline-block;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.6;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

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

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

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

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

    .pricing-card.featured {
        transform: scale(1);
    }

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

    .download-info {
        flex-direction: column;
        gap: 10px;
    }

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

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