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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

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

/* Header */
.header {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
}

.logo img {
    height: 40px;
    width: auto;
}

.nav {
    display: flex;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-link:hover {
    color: #e53e3e;
}

.header-buttons {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.btn {
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    text-align: center;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
    display: inline-block;
}

.btn-primary {
    background: linear-gradient(135deg, #e53e3e, #d32f2f);
    color: white;
    box-shadow: 0 4px 15px rgba(229, 62, 62, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(229, 62, 62, 0.4);
}

.btn-outline {
    background: transparent;
    color: #e53e3e;
    border: 2px solid #e53e3e;
}

.btn-outline:hover {
    background: #e53e3e;
    color: white;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    color: #333;
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 600px;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: linear-gradient(135deg, #e53e3e, #d32f2f);
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0.1;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 3rem;
    font-weight: 900;
    color: white;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: rgba(255,255,255,0.9);
    margin-bottom: 2rem;
}

.hero-benefits {
    list-style: none;
    margin-bottom: 3rem;
}

.hero-benefits li {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    color: white;
    font-size: 1.1rem;
}

.hero-benefits .icon {
    width: 24px;
    height: 24px;
    color: #4ade80;
}

.highlight {
    color: #4ade80;
    font-weight: 700;
}

.btn-hero {
    background: linear-gradient(135deg, #4ade80, #22c55e);
    color: white;
    padding: 16px 32px;
    font-size: 1.2rem;
    border-radius: 12px;
    box-shadow: 0 6px 20px rgba(74, 222, 128, 0.3);
}

.btn-hero:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(74, 222, 128, 0.4);
}

.hero-image img {
    width: 100%;
    max-width: 400px;
    height: auto;
    border-radius: 20px;
}

/* Info Section */
.info-section {
    padding: 4rem 0;
    background: white;
}

.info-card {
    background: linear-gradient(135deg, #e53e3e, #d32f2f);
    border-radius: 20px;
    padding: 3rem;
    color: white;
    box-shadow: 0 10px 30px rgba(229, 62, 62, 0.2);
}

.info-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 2rem;
    text-align: center;
}

.info-content p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.feature {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: rgba(255,255,255,0.1);
    padding: 1.5rem;
    border-radius: 12px;
    backdrop-filter: blur(10px);
}

.feature-icon {
    width: 32px;
    height: 32px;
    color: #4ade80;
    flex-shrink: 0;
}

.cta-section {
    text-align: center;
    margin-top: 3rem;
}

.btn-large {
    padding: 18px 40px;
    font-size: 1.3rem;
    background: linear-gradient(135deg, #4ade80, #22c55e);
}

/* Content Section */
.content-section {
    padding: 4rem 0;
    background: white;
}

.content-article {
    max-width: 800px;
    margin: 0 auto;
}

.content-article h1 {
    font-size: 2.5rem;
    color: #1a1a1a;
    margin-bottom: 2rem;
    text-align: center;
}

.content-article h2 {
    font-size: 2rem;
    color: #e53e3e;
    margin: 3rem 0 1.5rem 0;
    border-bottom: 3px solid #e53e3e;
    padding-bottom: 0.5rem;
}

.content-article h3 {
    font-size: 1.5rem;
    color: #333;
    margin: 2rem 0 1rem 0;
}

.content-article p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    line-height: 1.7;
    color: #444;
}

.content-article strong {
    color: #e53e3e;
    font-weight: 600;
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #eee;
}

th {
    background: linear-gradient(135deg, #e53e3e, #d32f2f);
    color: white;
    font-weight: 600;
}

tr:hover {
    background: #f8f9fa;
}

/* Author Section */
.author-section {
    margin: 4rem 0;
    padding: 2rem 0;
    border-top: 1px solid #eee;
    border-bottom: 1px solid #eee;
}

.author-card {
    display: flex;
    gap: 2rem;
    align-items: center;
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 12px;
}

.author-avatar img {
    width: 80px;
    height: 80px;
    border-radius: 50%;
}

.author-name {
    font-size: 1.3rem;
    font-weight: 700;
    color: #333;
    margin-bottom: 0.5rem;
}

.author-title {
    font-size: 1rem;
    color: #e53e3e;
    font-weight: 600;
    margin-bottom: 1rem;
}

.author-bio {
    color: #666;
    line-height: 1.6;
}

/* Features Section */
.features-section {
    padding: 4rem 0;
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: #333;
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.2rem;
    color: #666;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.15);
}

.feature-icon-wrapper {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #e53e3e, #d32f2f);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem auto;
}

.feature-card .feature-icon {
    width: 40px;
    height: 40px;
    color: white;
}

.feature-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: #333;
    margin-bottom: 1rem;
}

.feature-description {
    color: #666;
    line-height: 1.6;
}

/* Footer */
.footer {
    background: #1a1a1a;
    color: white;
    padding: 4rem 0 2rem 0;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-logo img {
    height: 50px;
    margin-bottom: 1rem;
}

.footer-description {
    color: #ccc;
    margin-bottom: 2rem;
    line-height: 1.6;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-link {
    width: 40px;
    height: 40px;
    background: #333;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: background 0.3s;
}

.social-link:hover {
    background: #e53e3e;
}

.social-link svg {
    width: 20px;
    height: 20px;
}

.footer-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: #e53e3e;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.8rem;
}

.footer-links a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: #e53e3e;
}

.footer-bottom {
    border-top: 1px solid #333;
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-copyright {
    color: #999;
}

.disclaimer {
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

.footer-payment {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.payment-title {
    color: #ccc;
    font-size: 0.9rem;
}

.payment-methods {
    display: flex;
    gap: 0.5rem;
}

.payment-method {
    background: #333;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.9rem;
    color: white;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .info-card {
        padding: 2rem;
    }
    
    .info-title {
        font-size: 2rem;
    }
    
    .features {
        grid-template-columns: 1fr;
    }
    
    .feature {
        flex-direction: column;
        text-align: center;
    }
    
    .author-card {
        flex-direction: column;
        text-align: center;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    table {
        font-size: 0.9rem;
    }
    
    th, td {
        padding: 0.5rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-title {
        font-size: 1.8rem;
    }
    
    .btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
    
    .content-article h1 {
        font-size: 2rem;
    }
    
    .content-article h2 {
        font-size: 1.6rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
}