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

:root {
    --primary: #6c5ce7;
    --color-purple-primary: #a855f7;
    --color-purple-light: rgba(168, 85, 247, 0.2);
    --color-purple-lighter: rgba(168, 85, 247, 0.1);
    --color-purple-border: rgba(168, 85, 247, 0.3);
    --color-purple-glow: rgba(168, 85, 247, 0.4);
    --color-purple-strong-glow: rgba(168, 85, 247, 0.3);
    --color-purple-gradient-start: rgba(168, 85, 247, 0.1);
    --color-purple-gradient-end: rgba(108, 92, 231, 0.05);

    --bg: #0f0f1e;
    --bg-light: #1a1a2e;
    --text: #e0e0e0;
    --text-light: #a0a0a0;
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;

    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 16px;
    --spacing-xl: 20px;
    --spacing-2xl: 24px;
    --spacing-3xl: 30px;
    --spacing-4xl: 40px;
    --spacing-5xl: 60px;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-full: 20px;

    --font-sm: 13px;
    --font-md: 14px;
    --font-lg: 18px;
    --font-xl: 20px;
    --font-2xl: 24px;
    --font-3xl: 32px;
    --font-4xl: 48px;

    --transition: all 0.3s;
}

body {
    font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, var(--bg) 0%, #1a0033 100%);
    color: var(--text);
    min-height: 100vh;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-xl);
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-xl) 0;
    margin-bottom: var(--spacing-3xl);
    border-bottom: 1px solid var(--color-purple-light);
}

.logo {
    font-size: var(--font-2xl);
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary) 0%, var(--color-purple-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav {
    display: flex;
    gap: var(--spacing-xl);
    align-items: center;
}

.nav-link {
    color: var(--text-light);
    text-decoration: none;
    cursor: pointer;
    transition: color var(--transition);
}

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

.btn {
    padding: 10px var(--spacing-xl);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: var(--font-md);
    font-weight: 600;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-md);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--color-purple-primary) 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px var(--color-purple-glow);
}

.btn-secondary {
    background: transparent;
    border: 1px solid var(--primary);
    color: var(--color-purple-primary);
}

.btn-secondary:hover {
    background: var(--color-purple-lighter);
}

.btn-text {
    background: none;
    color: var(--color-purple-primary);
    padding: 0;
}

.credits-badge {
    background: var(--color-purple-light);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-full);
    font-size: var(--font-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.credits-badge .icon {
    font-size: 16px;
}

.main-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4xl);
    align-items: center;
    margin-bottom: var(--spacing-5xl);
}

.hero-section h1 {
    font-size: var(--font-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-xl);
    line-height: 1.2;
}

.hero-section p {
    font-size: var(--font-lg);
    color: var(--text-light);
    margin-bottom: var(--spacing-3xl);
    line-height: 1.6;
}

.hero-cta {
    display: flex;
    gap: 15px;
    margin-bottom: var(--spacing-4xl);
}

.features-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.feature-item {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.feature-item .icon {
    font-size: 20px;
    color: var(--color-purple-primary);
    margin-top: 2px;
    flex-shrink: 0;
}

.feature-item .text {
    display: flex;
    flex-direction: column;
}

.feature-item .title {
    font-weight: 600;
    margin-bottom: 4px;
}

.feature-item .description {
    font-size: var(--font-sm);
    color: var(--text-light);
}

.hero-image {
    position: relative;
    height: 400px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: linear-gradient(135deg, var(--color-purple-gradient-start) 0%, var(--color-purple-gradient-end) 100%);
    border: 1px solid var(--color-purple-border);
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-image-placeholder {
    text-align: center;
    width: 100%;
    padding: var(--spacing-xl);
}

.hero-image-placeholder .icon {
    font-size: 80px;
    margin-bottom: var(--spacing-xl);
    opacity: 0.5;
}

.hero-mock {
    display: block;
    width: 100%;
    max-width: 560px;
    height: auto;
    margin: 0 auto;
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
}

.hero-image-caption,
.hero-image-placeholder p {
    color: var(--text-light);
    font-size: var(--font-md);
    margin-top: var(--spacing-md);
}

.section {
    margin-bottom: var(--spacing-5xl);
}

.section-title {
    font-size: var(--font-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-4xl);
    text-align: center;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-2xl);
}

.card {
    background: linear-gradient(135deg, var(--color-purple-gradient-start) 0%, var(--color-purple-gradient-end) 100%);
    border: 1px solid var(--color-purple-light);
    border-radius: var(--radius-md);
    padding: 28px;
    transition: var(--transition);
    cursor: pointer;
}

.card:hover {
    border-color: var(--color-purple-primary);
    box-shadow: 0 12px 40px var(--color-purple-light);
    transform: translateY(-4px);
}

.card-icon {
    font-size: 40px;
    margin-bottom: var(--spacing-lg);
}

.card-title {
    font-size: var(--font-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.card-description {
    font-size: var(--font-md);
    color: var(--text-light);
    line-height: 1.6;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-4xl);
}

.pricing-card {
    background: linear-gradient(135deg, var(--color-purple-gradient-start) 0%, var(--color-purple-gradient-end) 100%);
    border: 2px solid var(--color-purple-light);
    border-radius: var(--radius-md);
    padding: 32px;
    position: relative;
}

.pricing-card.featured {
    border-color: var(--color-purple-primary);
    box-shadow: 0 12px 40px var(--color-purple-strong-glow);
    transform: scale(1.05);
}

.pricing-card-badge {
    position: absolute;
    top: var(--spacing-xl);
    right: var(--spacing-xl);
    background: var(--color-purple-primary);
    color: white;
    padding: 6px var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: var(--font-sm);
    font-weight: 700;
}

.pricing-card-name {
    font-size: var(--font-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.pricing-card-price {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.pricing-card-currency {
    font-size: var(--font-lg);
    color: var(--text-light);
}

.pricing-card-period {
    color: var(--text-light);
    font-size: var(--font-sm);
    margin-bottom: var(--spacing-2xl);
}

.pricing-card-features {
    list-style: none;
    margin-bottom: var(--spacing-2xl);
}

.pricing-card-features li {
    padding: 10px 0;
    color: var(--text-light);
    font-size: var(--font-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.pricing-card-features li:before {
    content: '✓';
    color: var(--success);
    font-weight: 700;
}

.pricing-card-cta {
    width: 100%;
}

.auth-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.auth-modal.active {
    display: flex;
}

.auth-card {
    background: var(--bg-light);
    border: 1px solid var(--color-purple-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-4xl);
    max-width: 400px;
    width: 100%;
    animation: slideUp 0.3s ease;
}

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

.auth-card-title {
    font-size: var(--font-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-xl);
}

.form-group {
    margin-bottom: var(--spacing-xl);
}

.form-label {
    display: block;
    font-size: var(--font-sm);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-light);
}

.form-input {
    width: 100%;
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--color-purple-light);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: var(--font-md);
    transition: var(--transition);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-purple-primary);
    background: var(--color-purple-lighter);
}

.form-error {
    color: var(--error);
    font-size: var(--font-sm);
    margin-top: var(--spacing-sm);
}

.auth-footer {
    text-align: center;
    margin-top: var(--spacing-xl);
    font-size: var(--font-sm);
    color: var(--text-light);
}

.auth-footer button {
    background: none;
    border: none;
    color: var(--color-purple-primary);
    cursor: pointer;
    text-decoration: underline;
}

.tab-navigation {
    display: flex;
    gap: 10px;
    margin-bottom: var(--spacing-3xl);
    border-bottom: 1px solid var(--color-purple-light);
}

.tab-button {
    padding: var(--spacing-md) var(--spacing-xl);
    background: none;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    font-weight: 600;
    font-size: var(--font-md);
    border-bottom: 2px solid transparent;
    transition: var(--transition);
    margin-bottom: -1px;
}

.tab-button.active {
    color: var(--color-purple-primary);
    border-bottom-color: var(--color-purple-primary);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.alert {
    padding: var(--spacing-lg);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-xl);
    font-size: var(--font-md);
    animation: slideDown 0.3s ease;
}

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

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #10b981;
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #ef4444;
}

.alert-warning {
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.3);
    color: #f59e0b;
}

.loading {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid var(--color-purple-light);
    border-top-color: var(--color-purple-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

footer {
    text-align: center;
    padding: var(--spacing-4xl) 0 var(--spacing-xl);
    border-top: 1px solid var(--color-purple-light);
    color: var(--text-light);
    font-size: var(--font-sm);
}

footer .last-updated {
    margin-top: var(--spacing-xs);
    font-size: var(--font-xs, 0.75rem);
    opacity: 0.7;
}

@media (max-width: 768px) {
    .main-content {
        grid-template-columns: 1fr;
    }

    .hero-section h1 {
        font-size: var(--font-3xl);
    }

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

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

    header {
        flex-direction: column;
        gap: var(--spacing-xl);
    }

    .nav {
        flex-direction: column;
        width: 100%;
    }
}