.form-container {
    max-width: 700px;
    margin: 2rem auto;
    padding: 0 1rem;

    h1 {
        text-align: center;
        color: var(--color-text-primary-light);
        margin-bottom: 2rem;
        font-size: 2rem;
    }
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;

    fieldset {
        border: 2px solid var(--color-border-light);
        border-radius: 0.5rem;
        padding: 2rem;
        margin: 0;
        background-color: var(--color-card-bg-light);
        box-shadow: var(--color-card-shadow-light);
        transition: background-color 0.5s ease, border-color 0.5s ease, box-shadow 0.5s ease;
    }

    legend {
        font-size: 1.5rem;
        font-weight: 600;
        color: var(--color-text-primary-light);
        margin-bottom: 1rem;
        padding: 0.5rem;
    }

    label {
        display: block;
        color: var(--color-text-secondary-light);
        font-weight: 500;
        margin-bottom: 1rem;

        input,
        textarea {
            display: block;
            width: 100%;
            margin-top: 0.5rem;
            transition: background-color 0.5s ease, border-color 0.5s ease, box-shadow 0.5s ease;
        }
    }

    input,
    textarea {
        padding: 0.75rem;
        border: 2px solid var(--color-border-light);
        border-radius: 0.375rem;
        font-family: var(--font-main);
        font-size: 1rem;
        background-color: var(--color-bg-light);
        color: var(--color-text-primary-light);
        transition: border-color 0.3s ease, box-shadow 0.3s ease;

        &:focus {
            outline: none;
            border-color: var(--active-color);
            box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
        }

        &:invalid:not(:focus):not(:placeholder-shown) {
            border-color: #dc3545;
            box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.1);
        }

        &:valid:not(:placeholder-shown) {
            border-color: #198754;
            box-shadow: 0 0 0 3px rgba(25, 135, 84, 0.1);
        }
        
        &:user-invalid {
            border-color: #dc3545;
            box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.1);
        }
        
        &:user-valid:not(:placeholder-shown) {
            border-color: #198754;
            box-shadow: 0 0 0 3px rgba(25, 135, 84, 0.1);
        }

        &::placeholder {
            color: var(--color-text-secondary-light);
            opacity: 0.6;
        }
    }

    textarea {
        resize: vertical;
        min-height: 100px;
    }

    .form-buttons {
        display: flex;
        gap: 1rem;
        justify-content: flex-end;
        margin-top: 1rem;
    }

    button {
        padding: 0.75rem 1.5rem;
        border: none;
        border-radius: 0.375rem;
        font-family: var(--font-main);
        font-size: 1rem;
        font-weight: 500;
        cursor: pointer;
        transition: background-color 0.3s ease, transform 0.2s ease;

        &[type="submit"] {
            background-color: var(--active-color);
            color: white;

            &:hover {
                background-color: var(--active-color-muted, #0056b3);
                transform: translateY(-1px);
            }

            &:active {
                transform: translateY(0);
            }
        }

        &[type="button"],
        &[type="reset"] {
            background-color: var(--color-border-light);
            color: var(--color-text-secondary-light);

            &:hover {
                background-color: var(--color-icon-hover-bg-light);
            }
        }
    }
}

.required-indicator {
    color: #dc3545;
    font-weight: bold;
    margin-left: 0.25rem;
}

.field-error {
    display: none;
}

#theme-toggle-checkbox:checked ~ main {
    .form-container h1 {
        color: var(--color-text-primary-dark);
    }

    .required-indicator {
        color: #ff6b6b;
    }

    .contact-form {
        
        fieldset {
            background-color: var(--color-card-bg-dark);
            border-color: var(--color-border-dark);
            box-shadow: var(--color-card-shadow-dark);
        }

        legend {
            color: var(--color-text-primary-dark);
        }

        label {
            color: var(--color-text-secondary-dark);
        }

        input,
        textarea {
            background-color: var(--color-bg-alt-dark);
            color: var(--color-text-primary-dark);
            border-color: var(--color-border-dark);

            &::placeholder {
                color: var(--color-text-muted-dark);
            }
            
            &:invalid:not(:focus):not(:placeholder-shown),
            &:user-invalid {
                border-color: #ff6b6b;
                box-shadow: 0 0 0 3px rgba(255, 107, 107, 0.1);
            }

            &:valid:not(:placeholder-shown),
            &:user-valid:not(:placeholder-shown) {
                border-color: #51cf66;
                box-shadow: 0 0 0 3px rgba(81, 207, 102, 0.1);
            }
        }

        button[type="button"],
        button[type="reset"] {
            background-color: var(--color-border-dark);
            color: var(--color-text-secondary-dark);

            &:hover {
                background-color: var(--color-icon-hover-bg-dark);
            }
        }
    }
}

@media (max-width: 768px) {
    .contact-form {
        
        fieldset {
            padding: 1.5rem;
        }
        
        .form-buttons {
            flex-direction: column;
        }
        
        button {
            width: 100%;
        }
    }
}