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

:root {
    --primary: #00D9FF;
    --secondary: #7C3AED;
    --dark-bg: #0F0F1E;
    --card-bg: #1A1A2E;
    --text-primary: #FFFFFF;
    --text-secondary: #A0A0B0;
    --border: #2D2D3D;
    --success: #10B981;
    --error: #EF4444;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--dark-bg);
    color: var(--text-primary);
    line-height: 1.6;
}

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

/* Header */
.header {
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: bold;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s;
}

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

.user-menu {
    display: flex;
    align-items: center;
    gap: 1rem;
}

#userDisplay {
    color: var(--text-secondary);
}

#authBtn {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border: none;
    color: var(--dark-bg);
    padding: 0.5rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.3s;
}

#authBtn:hover {
    transform: scale(1.05);
}

/* Main */
.main {
    min-height: calc(100vh - 200px);
    padding: 3rem 0;
}

.page {
    display: none;
}

.page.active {
    display: block;
    animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 4rem 0;
    background: linear-gradient(135deg, rgba(0, 217, 255, 0.1), rgba(124, 58, 237, 0.1));
    border-radius: 1rem;
    margin-bottom: 4rem;
}

.hero h1 {
    font-size: 3.5rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-secondary);
}

/* Catalog Section */
.catalog {
    padding: 2rem 0;
}

.catalog h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 3rem;
}

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

.product-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 1rem;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s;
    cursor: pointer;
}

.product-card:hover {
    border-color: var(--primary);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 217, 255, 0.2);
}

.product-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.product-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.product-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    min-height: 60px;
}

.product-price {
    font-size: 2rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
}

.product-btn {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border: none;
    color: var(--dark-bg);
    padding: 0.75rem 2rem;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.3s;
    width: 100%;
}

.product-btn:hover {
    transform: scale(1.05);
}

/* Auth */
.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 200px);
}

.auth-box {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 1rem;
    padding: 3rem;
    width: 100%;
    max-width: 400px;
}

.auth-box h2 {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-box form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.auth-box input {
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 0.75rem;
    border-radius: 0.5rem;
    font-size: 1rem;
}

.auth-box input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 10px rgba(0, 217, 255, 0.3);
}

.auth-box button {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border: none;
    color: var(--dark-bg);
    padding: 0.75rem;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.3s;
}

.auth-box button:hover {
    transform: scale(1.05);
}

.auth-toggle {
    text-align: center;
    color: var(--text-secondary);
    margin-top: 1rem;
}

.auth-toggle a {
    color: var(--primary);
    text-decoration: none;
}

/* Product Detail */
.back-btn {
    background: none;
    border: none;
    color: var(--primary);
    font-size: 1rem;
    cursor: pointer;
    margin-bottom: 2rem;
    transition: color 0.3s;
}

.back-btn:hover {
    color: var(--secondary);
}

.product-detail {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 1rem;
    padding: 3rem;
    max-width: 600px;
    margin: 0 auto;
}

.product-detail h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.product-detail p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.product-detail-price {
    font-size: 2.5rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 2rem 0;
}

.buy-btn {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border: none;
    color: var(--dark-bg);
    padding: 1rem 2rem;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    font-size: 1rem;
    width: 100%;
    transition: transform 0.3s;
}

.buy-btn:hover {
    transform: scale(1.05);
}

/* Checkout */
.checkout-container {
    display: flex;
    justify-content: center;
}

.checkout-box {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 1rem;
    padding: 2rem;
    width: 100%;
    max-width: 500px;
}

.checkout-box h2 {
    margin-bottom: 2rem;
}

.checkout-info {
    background-color: rgba(0, 217, 255, 0.1);
    border: 1px solid var(--primary);
    border-radius: 0.5rem;
    padding: 1rem;
    margin-bottom: 2rem;
}

.checkout-info p {
    margin-bottom: 0.5rem;
}

.pix-code,
.qr-code {
    margin-bottom: 2rem;
}

.pix-code h3,
.qr-code h3 {
    margin-bottom: 1rem;
    color: var(--primary);
}

#pixCode {
    width: 100%;
    height: 100px;
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 1rem;
    border-radius: 0.5rem;
    font-family: monospace;
    font-size: 0.9rem;
    resize: none;
    margin-bottom: 0.5rem;
}

.copy-btn,
.confirm-btn {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border: none;
    color: var(--dark-bg);
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    width: 100%;
    margin-bottom: 1rem;
    transition: transform 0.3s;
}

.copy-btn:hover,
.confirm-btn:hover {
    transform: scale(1.05);
}

/* Purchases */
.purchases-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

.purchase-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 1rem;
    padding: 1.5rem;
}

.purchase-card h3 {
    margin-bottom: 0.5rem;
}

.purchase-status {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 0.25rem;
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.purchase-status.active {
    background-color: rgba(16, 185, 129, 0.2);
    color: var(--success);
}

.purchase-status.waiting {
    background-color: rgba(245, 158, 11, 0.2);
    color: #F59E0B;
}

.purchase-info {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.activate-btn {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border: none;
    color: var(--dark-bg);
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    width: 100%;
    transition: transform 0.3s;
}

.activate-btn:hover {
    transform: scale(1.05);
}

.activate-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Activation */
.activation-box {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 1rem;
    padding: 2rem;
    max-width: 500px;
    margin: 0 auto;
}

.activation-box h2 {
    margin-bottom: 2rem;
}

.activation-box form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.activation-box label {
    color: var(--text-secondary);
    font-weight: 600;
}

.activation-box input {
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 0.75rem;
    border-radius: 0.5rem;
}

.activation-box input:focus {
    outline: none;
    border-color: var(--primary);
}

.info {
    background-color: rgba(0, 217, 255, 0.1);
    border: 1px solid var(--primary);
    border-radius: 0.5rem;
    padding: 1rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.activation-box button {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border: none;
    color: var(--dark-bg);
    padding: 0.75rem;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.3s;
}

.activation-box button:hover {
    transform: scale(1.05);
}

/* Footer */
.footer {
    background-color: var(--card-bg);
    border-top: 1px solid var(--border);
    padding: 2rem 0;
    text-align: center;
    color: var(--text-secondary);
    margin-top: 4rem;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }

    .nav {
        gap: 1rem;
    }

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

    .header .container {
        flex-wrap: wrap;
    }
}