.form-container {
    max-width: 800px;
    margin: 0 auto;
    background-color: #fff;
    padding: 2.5rem;
    border-radius: 8px;
    border: 1px solid #e0e0e0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.form-group {
    position: relative;
}

.form-group.full-width {
    margin-top: 22px;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: #333;
    font-weight: bold;
    font-size: 0.9rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    background-color: #f9f9f9;
    color: #333;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: #999;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #a10000; 
    box-shadow: 0 0 0 3px rgba(161, 0, 0, 0.1); 
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
    line-height: 1.6;
}

.error-message {
    font-size: 0.85rem;
    color: #d00;
    position: absolute;
    bottom: -1.3rem;
    left: 0;
    display: none;
    width: 100%;
}

.form-group.error input,
.form-group.error select,
.form-group.error textarea {
    border-color: #d00;
}

.form-group.error .error-message {
    display: block;
}

.form-success-message {
    display: none;
    color: #0a0;
    background-color: #f0fff0;
    border: 1px solid #c0e0c0;
    text-align: center;
    margin-bottom: 1.5rem;
    padding: 1rem;
    border-radius: 4px;
}

.form-success-message.show {
    display: block;
}

.submit-btn {
    width: 100%;
    padding: 1rem 2rem;
    margin-top: 30px;
    background-color: #a10000;
    color: #fff;
    border: none;
    border-radius: 5px;
    font-size: 1.1rem;
    font-weight: bold;
    font-family: inherit;
    cursor: pointer;
    text-align: center;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.submit-btn:hover {
    background-color: #800000;
    transform: translateY(-2px);
}

.submit-btn:disabled {
    background-color: #ccc;
    cursor: not-allowed;
    transform: none;
}

.submit-btn.loading {
    position: relative;
    color: transparent;
}

.submit-btn.loading::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 24px;
    top: 50%;
    left: 50%;
    margin-left: -12px;
    margin-top: -12px;
    border: 3px solid rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    border-top-color: #ffffff;
    animation: spin 1s linear infinite;
}

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

@media (max-width: 768px) {
    .form-container {
        padding: 2rem 1.5rem;
    }

    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
        margin-bottom: 0;
    }

    .form-group {
        margin-bottom: 1.2rem;
    }

    .form-group:last-child {
        margin-bottom: 0;
    }

    .form-group input,
    .form-group select,
    .form-group textarea {
        font-size: 16px;
    }

    .error-message {
        position: static;
        bottom: auto;
        margin-top: 0.5rem;
    }
}

@media (max-width: 480px) {
    .form-container {
        padding: 1.5rem 1rem;
    }

    .submit-btn {
        padding: 0.8rem 1.5rem;
        font-size: 1rem;
    }
}