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

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

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

/* Navbar */
.navbar {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    color: white;
    font-size: 1.5rem;
    font-weight: bold;
}

.nav-logo i {
    margin-right: 10px;
    font-size: 1.8rem;
}

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

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

.nav-link:hover, .nav-link.active {
    color: #ffd700;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: white;
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
    margin-top: 70px;
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    animation: fadeInUp 1s ease;
}

.hero-content p {
    font-size: 1.3rem;
    margin-bottom: 30px;
    animation: fadeInUp 1s ease 0.2s both;
}

.cta-btn {
    background: #ffd700;
    color: #333;
    padding: 15px 40px;
    border: none;
    border-radius: 50px;
    font-size: 1.2rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s;
    animation: fadeInUp 1s ease 0.4s both;
}

.cta-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(255,215,0,0.4);
}

/* Products Section */
.products-section {
    padding: 100px 0;
    background: #f8f9fa;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: #333;
}

.category-tabs {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 12px 30px;
    border: 2px solid #667eea;
    background: white;
    color: #667eea;
    border-radius: 25px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s;
}

.tab-btn.active,
.tab-btn:hover {
    background: #667eea;
    color: white;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}

.product-card {
    background: white;
    border-radius: 20px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: all 0.3s;
    cursor: pointer;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.15);
}

.product-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    color: #667eea;
}

.product-card.pulsa .product-icon { color: #28a745; }
.product-card.data .product-icon { color: #007bff; }
.product-card.token .product-icon { color: #ffc107; }
.product-card.ewallet .product-icon { color: #17a2b8; }
.product-card.game .product-icon { color: #e83e8c; }

.product-name {
    font-size: 1.3rem;
    font-weight: bold;
    margin-bottom: 10px;
    color: #333;
}

.product-price {
    font-size: 1.5rem;
    font-weight: bold;
    color: #28a745;
    margin-bottom: 20px;
}

.product-select {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 12px 25px;
    border-radius: 25px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s;
}

.product-select:hover {
    transform: translateY(-2px);
}

/* Transaction Section */
.transaction-section {
    padding: 100px 0;
    background: white;
}

.transaction-form {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: start;
}

.product-detail {
    background: #f8f9fa;
    padding: 40px;
    border-radius: 20px;
    min-height: 400px;
}

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

.product-selected img {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    margin-bottom: 20px;
    background: #667eea;
}

.product-selected h3 {
    font-size: 1.8rem;
    margin-bottom: 10px;
    color: #333;
}

.product-selected .price {
    font-size: 2rem;
    font-weight: bold;
    color: #28a745;
    margin-bottom: 20px;
}

.payment-form {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #333;
}

.form-group input {
    width: 100%;
    padding: 15px;
    border: 2px solid #e9ecef;
    border-radius: 10px;
    font-size: 1.1rem;
    transition: border-color 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: #667eea;
}

.buy-btn {
    width: 100%;
    background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
    color: white;
    border: none;
    padding: 20px;
    border-radius: 15px;
    font-size: 1.3rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s;
}

.buy-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 30px rgba(40,167,69,0.4);
}

.buy-btn:disabled {
    background: #6c757d;
    cursor: not-allowed;
    transform: none;
}

/* Notification */
.notification {
    position: fixed;
    top: 100px;
    right: -400px;
    padding: 20px 30px;
    background: #28a745;
    color: white;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    z-index: 2000;
    transition: all 0.3s;
}

.notification.show {
    right: 20px;
}

.notification.error {
    background: #dc3545;
}

/* Loading */
.loading {
    text-align: center;
    padding: 40px;
    color: #666;
    font-style: italic;
}

/* Responsive */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: #667eea;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        padding: 20px 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .transaction-form {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .category-tabs {
        justify-content: flex-start;
        overflow-x: auto;
        padding-bottom: 10px;
    }
}

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