:root {
    --primary-color: #3b82f6;
    --primary-dark: #2563eb;
    --secondary-color: #10b981;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-light: #94a3b8;
    --background: #0f172a;
    --surface: #1e293b;
    --border: #334155;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.4);
    --gradient: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
}

.form-wrapper {
    background: var(--surface);
    border-radius: 24px;
    box-shadow: var(--shadow-lg);
    padding: 40px;
    max-width: 800px;
    width: 100%;
    position: relative;
    overflow: hidden;
    border: 1px solid var(--border);
}

.form-wrapper::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient);
}

.header {
    text-align: center;
    margin-bottom: 40px;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 16px;
}

.logo i {
    font-size: 32px;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo h1 {
    font-family: 'Cal Sans', sans-serif;
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header h2 {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.form-section {
    margin-bottom: 40px;
}

.form-section h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.plans-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 30px;
}

.plan-card {
    background: var(--background);
    border: 2px solid var(--border);
    border-radius: 16px;
    padding: 24px;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.plan-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
    background: var(--surface);
}

.plan-card.selected {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(16, 185, 129, 0.1));
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

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

.popular-badge {
    position: absolute;
    top: -1px;
    right: 20px;
    background: var(--gradient);
    color: white;
    padding: 6px 16px;
    border-radius: 0 0 12px 12px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.plan-header {
    text-align: center;
    margin-bottom: 20px;
}

.plan-header h4 {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

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

.price span {
    font-size: 1rem;
    font-weight: 400;
    color: var(--text-secondary);
}

.plan-features {
    list-style: none;
}

.plan-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 0;
    color: var(--text-secondary);
}

.plan-features i {
    color: var(--secondary-color);
    font-size: 0.9rem;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
    font-size: 0.95rem;
}

.form-group input {
    padding: 16px;
    border: 2px solid var(--border);
    border-radius: 12px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: var(--background);
    color: var(--text-primary);
}

.form-group input::placeholder {
    color: var(--text-light);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
    background: var(--surface);
}

.submit-btn {
    width: 100%;
    padding: 18px 32px;
    background: var(--gradient);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.submit-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.submit-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.submit-btn.loading {
    pointer-events: none;
}

.btn-text, .btn-loading {
    transition: opacity 0.3s ease;
}

.btn-loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    opacity: 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

.submit-btn.loading .btn-text {
    opacity: 0;
}

.submit-btn.loading .btn-loading {
    opacity: 1;
}

.notification {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    padding: 20px;
}

.notification.show {
    opacity: 1;
    visibility: visible;
}

.notification-content {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 40px;
    text-align: center;
    max-width: 400px;
    width: 100%;
    box-shadow: var(--shadow-lg);
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.notification.show .notification-content {
    transform: scale(1);
}

.notification-content i {
    font-size: 3rem;
    color: var(--secondary-color);
    margin-bottom: 20px;
}

.notification-content h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.notification-content p {
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.6;
}

.notification-close {
    background: var(--gradient);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.notification-close:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

.client-login-link {
    text-align: center;
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}

.client-login-link a {
    color: var(--text-secondary);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
    padding: 12px 20px;
    border-radius: 8px;
    border: 2px solid transparent;
}

.client-login-link a:hover {
    color: var(--primary-color);
    border-color: var(--primary-color);
    background: rgba(59, 130, 246, 0.1);
}

@media (max-width: 768px) {
    .form-wrapper {
        padding: 24px;
        margin: 10px;
        border-radius: 16px;
    }
    
    .plans-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .plan-card {
        padding: 20px;
    }
    
    .plan-card.popular {
        transform: none;
    }
    
    .form-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .logo h1 {
        font-size: 2rem;
    }
    
    .header h2 {
        font-size: 1.5rem;
    }
    
    .notification-content {
        padding: 30px 24px;
        margin: 20px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 10px;
    }
    
    .form-wrapper {
        padding: 20px;
    }
    
    .logo {
        flex-direction: column;
        gap: 8px;
    }
    
    .logo h1 {
        font-size: 1.8rem;
    }
    
    .header h2 {
        font-size: 1.3rem;
    }
    
    .plans-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .plan-card {
        padding: 16px;
    }
    
    .plan-header h4 {
        font-size: 1.1rem;
    }
    
    .price {
        font-size: 1rem;
    }
    
    .plan-features {
        font-size: 0.85rem;
    }
    
    .plan-features li {
        padding: 6px 0;
    }
    
    .popular-badge {
        font-size: 0.75rem;
        padding: 6px 14px;
    }
}