:root {
    --black: #000000;
    --gold: #d4af37;
    --gold-light: #e5c158;
    --gold-dark: #b8941f;
    --white: #ffffff;
    --gray-light: #cccccc;
    --gray: #666666;
    --gray-dark: #333333;
    --overlay: rgba(0, 0, 0, 0.6);
    --overlay-heavy: rgba(0, 0, 0, 0.75);
}

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

body {
    font-family: 'Arial', sans-serif;
    background: linear-gradient(135deg, var(--black) 0%, var(--gray-dark) 100%);
    color: var(--white);
    min-height: 100vh;
    line-height: 1.6;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

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

.header h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--gold);
    text-shadow: 0 2px 4px var(--overlay);
}

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

.estimation-form {
    background: var(--gray-dark);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 8px 32px var(--overlay);
    border: 1px solid var(--gold);
}

.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: bold;
    color: var(--gold-light);
}

select, input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--gray);
    border-radius: 5px;
    background: var(--black);
    color: var(--white);
    font-size: 1rem;
    transition: all 0.3s ease;
}

select:focus, input:focus {
    outline: none;
    border-color: var(--gold);
    box-shadow: 0 0 0 3px var(--overlay);
}

select option {
    background: var(--black);
    color: var(--white);
}

.btn-primary {
    width: 100%;
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--gold) 0%, var(--gold-dark) 100%);
    color: var(--black);
    border: none;
    border-radius: 5px;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px var(--overlay);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    padding: 0.75rem 1.5rem;
    background: transparent;
    color: var(--gold);
    border: 2px solid var(--gold);
    border-radius: 5px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background: var(--gold);
    color: var(--black);
}

.result-section {
    background: var(--gray-dark);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 8px 32px var(--overlay);
    border: 1px solid var(--gold);
    text-align: center;
    margin-top: 2rem;
}

.price-display {
    margin: 2rem 0;
}

.price {
    font-size: 3rem;
    font-weight: bold;
    color: var(--gold);
    text-shadow: 0 2px 4px var(--overlay);
}

.result-details {
    color: var(--gray-light);
    margin-bottom: 1.5rem;
}

.error-message {
    color: #ff6b6b;
    font-size: 0.875rem;
    margin-top: 0.25rem;
    display: block;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: var(--overlay-heavy);
    backdrop-filter: blur(5px);
}

.modal-content {
    background: var(--gray-dark);
    margin: 5% auto;
    padding: 0;
    border-radius: 10px;
    width: 90%;
    max-width: 500px;
    box-shadow: 0 20px 60px var(--overlay);
    border: 1px solid var(--gold);
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    background: var(--black);
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--gold);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-radius: 10px 10px 0 0;
}

.modal-header h2 {
    color: var(--gold);
    margin: 0;
}

.close {
    color: var(--gray-light);
    font-size: 2rem;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s ease;
}

.close:hover {
    color: var(--gold);
}

.contact-form {
    padding: 2rem;
}

.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.form-actions .btn-primary,
.form-actions .btn-secondary {
    flex: 1;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    .header h1 {
        font-size: 2rem;
    }
    
    .estimation-form,
    .result-section {
        padding: 1.5rem;
    }
    
    .price {
        font-size: 2.5rem;
    }
    
    .modal-content {
        margin: 10% auto;
        width: 95%;
    }
    
    .contact-form {
        padding: 1.5rem;
    }
    
    .form-actions {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .header h1 {
        font-size: 1.75rem;
    }
    
    .estimation-form,
    .result-section {
        padding: 1rem;
    }
    
    .price {
        font-size: 2rem;
    }
    
    .modal-header {
        padding: 1rem 1.5rem;
    }
    
    .contact-form {
        padding: 1rem;
    }
}

/* Loading State */
.loading {
    opacity: 0.7;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--gold);
    border-top: 2px solid transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}